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PIKApp/app/display/pikadisplayshell-tool-events.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <math.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "display-types.h"
#include "tools/tools-types.h"
#include "config/pikadisplayconfig.h"
#include "core/pika.h"
#include "core/pika-filter-history.h"
#include "core/pikacontext.h"
#include "core/pikaimage.h"
#include "core/pikaimage-pick-item.h"
#include "core/pikaitem.h"
#include "menus/menus.h"
#include "widgets/pikaaction.h"
#include "widgets/pikacontrollers.h"
#include "widgets/pikacontrollerkeyboard.h"
#include "widgets/pikacontrollerwheel.h"
#include "widgets/pikadeviceinfo.h"
#include "widgets/pikadeviceinfo-coords.h"
#include "widgets/pikadevicemanager.h"
#include "widgets/pikadevices.h"
#include "widgets/pikadialogfactory.h"
#include "widgets/pikadoubleaction.h"
#include "widgets/pikaenumaction.h"
#include "widgets/pikauimanager.h"
#include "widgets/pikawidgets-utils.h"
#include "tools/pikaguidetool.h"
#include "tools/pikamovetool.h"
#include "tools/pikapainttool.h"
#include "tools/pikasamplepointtool.h"
#include "tools/pikatoolcontrol.h"
#include "tools/tool_manager.h"
#include "pikacanvas.h"
#include "pikadisplay.h"
#include "pikadisplayshell.h"
#include "pikadisplayshell-autoscroll.h"
#include "pikadisplayshell-cursor.h"
#include "pikadisplayshell-grab.h"
#include "pikadisplayshell-layer-select.h"
#include "pikadisplayshell-rotate.h"
#include "pikadisplayshell-scale.h"
#include "pikadisplayshell-scroll.h"
#include "pikadisplayshell-tool-events.h"
#include "pikadisplayshell-transform.h"
#include "pikamodifiersmanager.h"
#include "pikaimagewindow.h"
#include "pikamotionbuffer.h"
#include "pikastatusbar.h"
#include "pika-intl.h"
#include "pika-log.h"
/* local function prototypes */
static GdkModifierType
pika_display_shell_key_to_state (gint key);
static GdkModifierType
pika_display_shell_button_to_state (gint button);
static void pika_display_shell_proximity_in (PikaDisplayShell *shell);
static void pika_display_shell_proximity_out (PikaDisplayShell *shell);
static gboolean pika_display_shell_check_device (PikaDisplayShell *shell,
GdkEvent *event,
gboolean *device_changed);
static void pika_display_shell_check_device_cursor (PikaDisplayShell *shell);
static void pika_display_shell_start_scrolling (PikaDisplayShell *shell,
const GdkEvent *event,
GdkModifierType state,
gint x,
gint y);
static void pika_display_shell_stop_scrolling (PikaDisplayShell *shell,
const GdkEvent *event);
static void pika_display_shell_handle_scrolling (PikaDisplayShell *shell,
GdkModifierType state,
gint x,
gint y);
static void pika_display_shell_rotate_gesture_maybe_get_state (GtkGestureRotate *gesture,
GdkEventSequence *sequence,
guint *maybe_out_state);
static void pika_display_shell_space_pressed (PikaDisplayShell *shell,
const GdkEvent *event);
static void pika_display_shell_released (PikaDisplayShell *shell,
const GdkEvent *event,
const PikaCoords *image_coords);
static gboolean pika_display_shell_tab_pressed (PikaDisplayShell *shell,
const GdkEventKey *event);
static void pika_display_shell_update_focus (PikaDisplayShell *shell,
gboolean focus_in,
const PikaCoords *image_coords,
GdkModifierType state);
static void pika_display_shell_update_cursor (PikaDisplayShell *shell,
const PikaCoords *display_coords,
const PikaCoords *image_coords,
GdkModifierType state,
gboolean update_software_cursor);
static gboolean pika_display_shell_initialize_tool (PikaDisplayShell *shell,
const PikaCoords *image_coords,
GdkModifierType state);
static void pika_display_shell_get_event_coords (PikaDisplayShell *shell,
const GdkEvent *event,
PikaCoords *display_coords,
GdkModifierType *state,
guint32 *time);
static void pika_display_shell_untransform_event_coords (PikaDisplayShell *shell,
const PikaCoords *display_coords,
PikaCoords *image_coords,
gboolean *update_software_cursor);
static void pika_display_shell_activate_action (Pika *pika,
const gchar *action_desc,
GVariant *value);
static gboolean pika_display_triggers_context_menu (const GdkEvent *event,
PikaDisplayShell *shell,
Pika *pika,
const PikaCoords *image_coords,
gboolean force);
/* public functions */
gboolean
pika_display_shell_events (GtkWidget *widget,
GdkEvent *event,
PikaDisplayShell *shell)
{
Pika *pika;
gboolean set_display = FALSE;
/* are we in destruction? */
if (! shell->display || ! pika_display_get_shell (shell->display))
return TRUE;
pika = pika_display_get_pika (shell->display);
switch (event->type)
{
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
{
GdkEventKey *kevent = (GdkEventKey *) event;
if (pika->busy)
return TRUE;
/* do not process most key events while BUTTON1 is down. We do this
* so tools keep the modifier state they were in when BUTTON1 was
* pressed and to prevent accelerators from being invoked.
*/
if (kevent->state & GDK_BUTTON1_MASK)
{
if (kevent->keyval == GDK_KEY_Shift_L ||
kevent->keyval == GDK_KEY_Shift_R ||
kevent->keyval == GDK_KEY_Control_L ||
kevent->keyval == GDK_KEY_Control_R ||
kevent->keyval == GDK_KEY_Alt_L ||
kevent->keyval == GDK_KEY_Alt_R ||
kevent->keyval == GDK_KEY_Meta_L ||
kevent->keyval == GDK_KEY_Meta_R ||
kevent->keyval == GDK_KEY_space ||
kevent->keyval == GDK_KEY_KP_Space)
{
break;
}
return TRUE;
}
switch (kevent->keyval)
{
case GDK_KEY_Left: case GDK_KEY_Right:
case GDK_KEY_Up: case GDK_KEY_Down:
case GDK_KEY_space:
case GDK_KEY_KP_Space:
case GDK_KEY_Tab:
case GDK_KEY_KP_Tab:
case GDK_KEY_ISO_Left_Tab:
case GDK_KEY_Alt_L: case GDK_KEY_Alt_R:
case GDK_KEY_Shift_L: case GDK_KEY_Shift_R:
case GDK_KEY_Control_L: case GDK_KEY_Control_R:
case GDK_KEY_Meta_L: case GDK_KEY_Meta_R:
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
case GDK_KEY_ISO_Enter:
case GDK_KEY_BackSpace:
case GDK_KEY_Escape:
break;
default:
if (shell->space_release_pending ||
shell->button1_release_pending ||
shell->mod_action != PIKA_MODIFIER_ACTION_NONE)
return TRUE;
break;
}
set_display = TRUE;
break;
}
case GDK_BUTTON_PRESS:
case GDK_SCROLL:
set_display = TRUE;
break;
case GDK_FOCUS_CHANGE:
{
GdkEventFocus *fevent = (GdkEventFocus *) event;
if (fevent->in && shell->display->config->activate_on_focus)
set_display = TRUE;
}
break;
default:
break;
}
/* Setting the context's display automatically sets the image, too */
if (set_display)
pika_context_set_display (pika_get_user_context (pika), shell->display);
return FALSE;
}
static gboolean
pika_display_shell_canvas_no_image_events (GtkWidget *canvas,
GdkEvent *event,
PikaDisplayShell *shell)
{
switch (event->type)
{
case GDK_2BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
PikaUIManager *manager = menus_get_image_manager_singleton (shell->display->pika);
pika_ui_manager_activate_action (manager, "file", "file-open");
}
return TRUE;
}
break;
case GDK_BUTTON_PRESS:
if (gdk_event_triggers_context_menu (event))
{
pika_ui_manager_ui_popup_at_pointer (shell->popup_manager,
"/image-menubar",
GTK_WIDGET (shell),
(GdkEvent *) event,
NULL, NULL);
return TRUE;
}
break;
case GDK_KEY_PRESS:
{
GdkEventKey *kevent = (GdkEventKey *) event;
if (kevent->keyval == GDK_KEY_Tab ||
kevent->keyval == GDK_KEY_KP_Tab ||
kevent->keyval == GDK_KEY_ISO_Left_Tab)
{
return pika_display_shell_tab_pressed (shell, kevent);
}
}
break;
default:
break;
}
return FALSE;
}
gboolean
pika_display_shell_canvas_tool_events (GtkWidget *canvas,
GdkEvent *event,
PikaDisplayShell *shell)
{
PikaDisplay *display;
PikaImage *image;
Pika *pika;
PikaModifiersManager *mod_manager;
PikaCoords display_coords;
PikaCoords image_coords;
GdkModifierType state;
guint32 time;
gboolean device_changed = FALSE;
gboolean return_val = FALSE;
gboolean update_sw_cursor = FALSE;
g_return_val_if_fail (gtk_widget_get_realized (canvas), FALSE);
/* are we in destruction? */
if (! shell->display || ! pika_display_get_shell (shell->display))
return TRUE;
/* set the active display before doing any other canvas event processing */
if (pika_display_shell_events (canvas, event, shell))
return TRUE;
/* events on overlays have a different window, but these windows'
* user_data can still be the canvas, we need to check manually if
* the event's window and the canvas' window are different.
*/
if (event->any.window != gtk_widget_get_window (canvas))
{
GtkWidget *event_widget;
gdk_window_get_user_data (event->any.window, (gpointer) &event_widget);
/* if the event came from a different window than the canvas',
* check if it came from a canvas child and bail out.
*/
if (gtk_widget_get_ancestor (event_widget, PIKA_TYPE_CANVAS))
return FALSE;
}
display = shell->display;
pika = pika_display_get_pika (display);
image = pika_display_get_image (display);
if (! image)
return pika_display_shell_canvas_no_image_events (canvas, event, shell);
PIKA_LOG (TOOL_EVENTS, "event (display %p): %s",
display, pika_print_event (event));
if (pika_display_shell_check_device (shell, event, &device_changed))
return TRUE;
pika_display_shell_get_event_coords (shell, event,
&display_coords,
&state, &time);
pika_display_shell_untransform_event_coords (shell,
&display_coords, &image_coords,
&update_sw_cursor);
/* If the device (and maybe the tool) has changed, update the new
* tool's state
*/
if (device_changed && gtk_widget_has_focus (canvas))
{
pika_display_shell_update_focus (shell, TRUE,
&image_coords, state);
}
mod_manager = PIKA_MODIFIERS_MANAGER (shell->display->config->modifiers_manager);
switch (event->type)
{
case GDK_ENTER_NOTIFY:
{
GdkEventCrossing *cevent = (GdkEventCrossing *) event;
if (cevent->mode != GDK_CROSSING_NORMAL)
return TRUE;
/* ignore enter notify while we have a grab */
if (shell->grab_pointer)
return TRUE;
pika_display_shell_proximity_in (shell);
update_sw_cursor = TRUE;
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
}
break;
case GDK_LEAVE_NOTIFY:
{
GdkEventCrossing *cevent = (GdkEventCrossing *) event;
if (cevent->mode != GDK_CROSSING_NORMAL)
return TRUE;
/* ignore leave notify while we have a grab */
if (shell->grab_pointer)
return TRUE;
pika_display_shell_proximity_out (shell);
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
}
break;
case GDK_PROXIMITY_IN:
pika_display_shell_proximity_in (shell);
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
break;
case GDK_PROXIMITY_OUT:
pika_display_shell_proximity_out (shell);
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
break;
case GDK_FOCUS_CHANGE:
{
GdkEventFocus *fevent = (GdkEventFocus *) event;
if (fevent->in)
{
if (G_UNLIKELY (! gtk_widget_has_focus (canvas)))
g_warning ("%s: FOCUS_IN but canvas has no focus", G_STRFUNC);
/* ignore focus changes while we have a grab */
if (shell->grab_pointer)
return TRUE;
/* press modifier keys when the canvas gets the focus */
pika_display_shell_update_focus (shell, TRUE,
&image_coords, state);
}
else
{
if (G_UNLIKELY (gtk_widget_has_focus (canvas)))
g_warning ("%s: FOCUS_OUT but canvas has focus", G_STRFUNC);
/* ignore focus changes while we have a grab */
if (shell->grab_pointer)
return TRUE;
/* release modifier keys when the canvas loses the focus */
pika_display_shell_update_focus (shell, FALSE,
&image_coords, 0);
}
}
break;
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
GdkModifierType button_state;
/* ignore new mouse events */
if (pika->busy ||
shell->mod_action != PIKA_MODIFIER_ACTION_NONE ||
shell->grab_pointer ||
shell->button1_release_pending)
return TRUE;
button_state = pika_display_shell_button_to_state (bevent->button);
state |= button_state;
/* ignore new buttons while another button is down */
if (((state & (GDK_BUTTON1_MASK)) && (state & (GDK_BUTTON2_MASK |
GDK_BUTTON3_MASK))) ||
((state & (GDK_BUTTON2_MASK)) && (state & (GDK_BUTTON1_MASK |
GDK_BUTTON3_MASK))) ||
((state & (GDK_BUTTON3_MASK)) && (state & (GDK_BUTTON1_MASK |
GDK_BUTTON2_MASK))))
return TRUE;
/* focus the widget if it isn't; if the toplevel window
* already has focus, this will generate a FOCUS_IN on the
* canvas immediately, therefore we do this before logging
* the BUTTON_PRESS.
*/
if (! gtk_widget_has_focus (canvas))
gtk_widget_grab_focus (canvas);
/* if the toplevel window didn't have focus, the above
* gtk_widget_grab_focus() didn't set the canvas' HAS_FOCUS
* flags, and didn't trigger a FOCUS_IN, but the tool needs
* to be set up correctly regardless, so simply do the
* same things here, it's safe to do them redundantly.
*/
pika_display_shell_update_focus (shell, TRUE,
&image_coords, state);
pika_display_shell_update_cursor (shell, &display_coords,
&image_coords, state & ~button_state,
FALSE);
if (bevent->button == 1)
{
if (! pika_display_shell_pointer_grab (shell, event,
GDK_POINTER_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK))
return TRUE;
if (pika_display_shell_initialize_tool (shell,
&image_coords, state))
{
PikaTool *active_tool;
PikaMotionMode motion_mode;
PikaCoords last_motion;
active_tool = tool_manager_get_active (pika);
motion_mode = pika_tool_control_get_motion_mode (active_tool->control);
if (motion_mode == PIKA_MOTION_MODE_EXACT)
{
/* enable motion compression for the canvas window for the
* duration of the stroke
*/
gdk_window_set_event_compression (gtk_widget_get_window (canvas), FALSE);
}
/* Use the last evaluated velocity&direction instead of the
* button_press event's ones because the click is
* usually at the same spot as the last motion event
* which would give us bogus derivate dynamics.
*/
pika_motion_buffer_begin_stroke (shell->motion_buffer, time,
&last_motion);
image_coords.velocity = last_motion.velocity;
image_coords.direction = last_motion.direction;
tool_manager_button_press_active (pika,
&image_coords,
time, state,
PIKA_BUTTON_PRESS_NORMAL,
display);
}
}
else
{
GdkDevice *device;
PikaModifierAction action;
const gchar *action_desc = NULL;
device = gdk_event_get_source_device (event);
action = pika_modifiers_manager_get_action (mod_manager, device,
bevent->button, bevent->state,
&action_desc);
shell->mod_action = action;
switch (action)
{
case PIKA_MODIFIER_ACTION_MENU:
pika_display_triggers_context_menu (event, shell, pika, &image_coords, TRUE);
shell->mod_action = PIKA_MODIFIER_ACTION_NONE;
break;
case PIKA_MODIFIER_ACTION_PANNING:
case PIKA_MODIFIER_ACTION_ZOOMING:
case PIKA_MODIFIER_ACTION_ROTATING:
case PIKA_MODIFIER_ACTION_STEP_ROTATING:
case PIKA_MODIFIER_ACTION_LAYER_PICKING:
case PIKA_MODIFIER_ACTION_BRUSH_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_BRUSH_RADIUS_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_TOOL_OPACITY:
pika_display_shell_start_scrolling (shell, event, state,
bevent->x, bevent->y);
break;
case PIKA_MODIFIER_ACTION_ACTION:
shell->mod_action_desc = g_strdup (action_desc);
break;
case PIKA_MODIFIER_ACTION_NONE:
pika_display_triggers_context_menu (event, shell, pika, &image_coords, FALSE);
break;
}
}
return_val = TRUE;
}
break;
case GDK_2BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
PikaTool *active_tool;
if (pika->busy)
return TRUE;
active_tool = tool_manager_get_active (pika);
if (bevent->button == 1 &&
active_tool &&
pika_tool_control_is_active (active_tool->control) &&
pika_tool_control_get_wants_double_click (active_tool->control))
{
tool_manager_button_press_active (pika,
&image_coords,
time, state,
PIKA_BUTTON_PRESS_DOUBLE,
display);
}
/* don't update the cursor again on double click */
return TRUE;
}
break;
case GDK_3BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
PikaTool *active_tool;
if (pika->busy)
return TRUE;
active_tool = tool_manager_get_active (pika);
if (bevent->button == 1 &&
active_tool &&
pika_tool_control_is_active (active_tool->control) &&
pika_tool_control_get_wants_triple_click (active_tool->control))
{
tool_manager_button_press_active (pika,
&image_coords,
time, state,
PIKA_BUTTON_PRESS_TRIPLE,
display);
}
/* don't update the cursor again on triple click */
return TRUE;
}
break;
case GDK_BUTTON_RELEASE:
{
GdkEventButton *bevent = (GdkEventButton *) event;
PikaTool *active_tool;
pika_display_shell_autoscroll_stop (shell);
if (bevent->button == 1 && shell->button1_release_pending)
{
pika_display_shell_released (shell, event, NULL);
return TRUE;
}
if (pika->busy)
return TRUE;
active_tool = tool_manager_get_active (pika);
state &= ~pika_display_shell_button_to_state (bevent->button);
if (bevent->button == 1)
{
/* If we don't have a grab, this is a release paired with
* a button press we intentionally ignored because we had
* a grab on another device at the time of the press
*/
if (! shell->grab_pointer || shell->mod_action != PIKA_MODIFIER_ACTION_NONE)
return TRUE;
if (active_tool &&
(! pika_image_is_empty (image) ||
pika_tool_control_get_handle_empty_image (active_tool->control)))
{
pika_motion_buffer_end_stroke (shell->motion_buffer);
gdk_window_set_event_compression (
gtk_widget_get_window (canvas), TRUE);
if (pika_tool_control_is_active (active_tool->control))
{
tool_manager_button_release_active (pika,
&image_coords,
time, state,
display);
}
}
/* update the tool's modifier state because it didn't get
* key events while BUTTON1 was down
*/
if (gtk_widget_has_focus (canvas))
pika_display_shell_update_focus (shell, TRUE,
&image_coords, state);
else
pika_display_shell_update_focus (shell, FALSE,
&image_coords, 0);
pika_display_shell_pointer_ungrab (shell, event);
}
else
{
switch (shell->mod_action)
{
case PIKA_MODIFIER_ACTION_MENU:
break;
case PIKA_MODIFIER_ACTION_PANNING:
case PIKA_MODIFIER_ACTION_ZOOMING:
case PIKA_MODIFIER_ACTION_ROTATING:
case PIKA_MODIFIER_ACTION_STEP_ROTATING:
case PIKA_MODIFIER_ACTION_LAYER_PICKING:
if (shell->mod_action != PIKA_MODIFIER_ACTION_NONE &&
! shell->button1_release_pending &&
(! shell->space_release_pending ||
shell->display->config->space_bar_action != PIKA_SPACE_BAR_ACTION_PAN))
pika_display_shell_stop_scrolling (shell, event);
break;
case PIKA_MODIFIER_ACTION_BRUSH_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_BRUSH_RADIUS_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_TOOL_OPACITY:
pika_display_shell_stop_scrolling (shell, event);
break;
case PIKA_MODIFIER_ACTION_ACTION:
pika_display_shell_activate_action (pika, shell->mod_action_desc, NULL);
g_clear_pointer (&shell->mod_action_desc, g_free);
break;
case PIKA_MODIFIER_ACTION_NONE:
break;
}
shell->mod_action = PIKA_MODIFIER_ACTION_NONE;
}
return_val = TRUE;
}
break;
case GDK_SCROLL:
{
GdkEventScroll *sevent = (GdkEventScroll *) event;
PikaController *wheel = pika_controllers_get_wheel (pika);
if (! wheel ||
! pika_controller_wheel_scroll (PIKA_CONTROLLER_WHEEL (wheel),
sevent))
{
if (state & pika_get_toggle_behavior_mask ())
{
gdouble delta;
switch (sevent->direction)
{
case GDK_SCROLL_UP:
pika_display_shell_scale (shell,
PIKA_ZOOM_IN,
0.0,
PIKA_ZOOM_FOCUS_POINTER);
break;
case GDK_SCROLL_DOWN:
pika_display_shell_scale (shell,
PIKA_ZOOM_OUT,
0.0,
PIKA_ZOOM_FOCUS_POINTER);
break;
case GDK_SCROLL_SMOOTH:
gdk_event_get_scroll_deltas (event, NULL, &delta);
pika_display_shell_scale (shell,
PIKA_ZOOM_SMOOTH,
delta,
PIKA_ZOOM_FOCUS_POINTER);
break;
default:
break;
}
}
else
{
gdouble value_x;
gdouble value_y;
pika_scroll_adjustment_values (sevent,
shell->hsbdata,
shell->vsbdata,
&value_x, &value_y);
gtk_adjustment_set_value (shell->hsbdata, value_x);
gtk_adjustment_set_value (shell->vsbdata, value_y);
}
}
pika_display_shell_untransform_event_coords (shell,
&display_coords,
&image_coords,
&update_sw_cursor);
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
return_val = TRUE;
}
break;
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
if (pika->busy)
return TRUE;
/* call proximity_in() here because the pointer might already
* be in proximity when the canvas starts to receive events,
* like when a new image has been created into an empty
* display
*/
pika_display_shell_proximity_in (shell);
update_sw_cursor = TRUE;
if (shell->mod_action != PIKA_MODIFIER_ACTION_NONE ||
shell->space_release_pending)
{
pika_display_shell_handle_scrolling (shell,
state, mevent->x, mevent->y);
}
else if (state & GDK_BUTTON1_MASK)
{
PikaTool *active_tool;
PikaMotionMode motion_mode;
active_tool = tool_manager_get_active (pika);
motion_mode = pika_tool_control_get_motion_mode (
active_tool->control);
if (active_tool &&
pika_tool_control_is_active (active_tool->control) &&
(! pika_image_is_empty (image) ||
pika_tool_control_get_handle_empty_image (active_tool->control)))
{
GdkTimeCoord **history_events;
gint n_history_events;
guint32 last_motion_time;
/* if the first mouse button is down, check for automatic
* scrolling...
*/
if ((mevent->x < 0 ||
mevent->y < 0 ||
mevent->x > shell->disp_width ||
mevent->y > shell->disp_height) &&
! pika_tool_control_get_scroll_lock (active_tool->control))
{
pika_display_shell_autoscroll_start (shell, state, mevent);
}
/* gdk_device_get_history() has several quirks. First
* is that events with borderline timestamps at both
* ends are included. Because of that we need to add 1
* to lower border. The second is due to poor X event
* resolution. We need to do -1 to ensure that the
* amount of events between timestamps is final or
* risk losing some.
*/
last_motion_time =
pika_motion_buffer_get_last_motion_time (shell->motion_buffer);
if (motion_mode == PIKA_MOTION_MODE_EXACT &&
shell->display->config->use_event_history &&
gdk_device_get_history (mevent->device, mevent->window,
last_motion_time + 1,
mevent->time - 1,
&history_events,
&n_history_events))
{
PikaDeviceInfo *device;
gint i;
device = pika_device_info_get_by_device (mevent->device);
for (i = 0; i < n_history_events; i++)
{
pika_device_info_get_time_coords (device,
history_events[i],
&display_coords);
pika_display_shell_untransform_event_coords (shell,
&display_coords,
&image_coords,
NULL);
/* Early removal of useless events saves CPU time.
*/
if (pika_motion_buffer_motion_event (shell->motion_buffer,
&image_coords,
history_events[i]->time,
TRUE))
{
pika_motion_buffer_request_stroke (shell->motion_buffer,
state,
history_events[i]->time);
}
}
gdk_device_free_history (history_events, n_history_events);
}
else
{
gboolean event_fill = (motion_mode == PIKA_MOTION_MODE_EXACT);
/* Early removal of useless events saves CPU time.
*/
if (pika_motion_buffer_motion_event (shell->motion_buffer,
&image_coords,
time,
event_fill))
{
pika_motion_buffer_request_stroke (shell->motion_buffer,
state,
time);
}
}
}
}
if (! (state &
(GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)))
{
/* Early removal of useless events saves CPU time.
* Pass event_fill = FALSE since we are only hovering.
*/
if (pika_motion_buffer_motion_event (shell->motion_buffer,
&image_coords,
time,
FALSE))
{
pika_motion_buffer_request_hover (shell->motion_buffer,
state,
shell->proximity);
}
}
return_val = TRUE;
}
break;
case GDK_KEY_PRESS:
{
GdkEventKey *kevent = (GdkEventKey *) event;
PikaTool *active_tool;
active_tool = tool_manager_get_active (pika);
if (state & GDK_BUTTON1_MASK)
{
if (kevent->keyval == GDK_KEY_Alt_L ||
kevent->keyval == GDK_KEY_Alt_R ||
kevent->keyval == GDK_KEY_Shift_L ||
kevent->keyval == GDK_KEY_Shift_R ||
kevent->keyval == GDK_KEY_Control_L ||
kevent->keyval == GDK_KEY_Control_R ||
kevent->keyval == GDK_KEY_Meta_L ||
kevent->keyval == GDK_KEY_Meta_R)
{
GdkModifierType key;
key = pika_display_shell_key_to_state (kevent->keyval);
state |= key;
if (active_tool &&
pika_tool_control_is_active (active_tool->control) &&
! pika_image_is_empty (image))
{
tool_manager_active_modifier_state_active (pika, state,
display);
}
}
}
else
{
gboolean arrow_key = FALSE;
tool_manager_focus_display_active (pika, display);
if (pika_tool_control_get_wants_all_key_events (active_tool->control))
{
if (tool_manager_key_press_active (pika, kevent, display))
{
/* FIXME: need to do some of the stuff below, like
* calling oper_update()
*/
return TRUE;
}
}
if (! gtk_widget_has_focus (shell->canvas))
{
/* The event was in an overlay widget and not handled
* there, make sure the overlay widgets are keyboard
* navigatable by letting the generic widget handlers
* deal with the event.
*/
return FALSE;
}
if (pika_display_shell_key_to_state (kevent->keyval) == GDK_MOD1_MASK)
/* Make sure the picked layer is reset. */
shell->picked_layer = NULL;
switch (kevent->keyval)
{
case GDK_KEY_Left:
case GDK_KEY_Right:
case GDK_KEY_Up:
case GDK_KEY_Down:
arrow_key = TRUE;
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
case GDK_KEY_ISO_Enter:
case GDK_KEY_BackSpace:
case GDK_KEY_Escape:
if (! pika_image_is_empty (image))
return_val = tool_manager_key_press_active (pika,
kevent,
display);
if (! return_val)
{
PikaController *keyboard = pika_controllers_get_keyboard (pika);
if (keyboard)
return_val =
pika_controller_keyboard_key_press (PIKA_CONTROLLER_KEYBOARD (keyboard),
kevent);
}
/* always swallow arrow keys, we don't want focus keynav */
if (! return_val)
return_val = arrow_key;
break;
case GDK_KEY_space:
case GDK_KEY_KP_Space:
if (shell->button1_release_pending)
shell->space_release_pending = TRUE;
else
pika_display_shell_space_pressed (shell, event);
return_val = TRUE;
break;
case GDK_KEY_Tab:
case GDK_KEY_KP_Tab:
case GDK_KEY_ISO_Left_Tab:
pika_display_shell_tab_pressed (shell, kevent);
return_val = TRUE;
break;
/* Update the state based on modifiers being pressed */
case GDK_KEY_Alt_L: case GDK_KEY_Alt_R:
case GDK_KEY_Shift_L: case GDK_KEY_Shift_R:
case GDK_KEY_Control_L: case GDK_KEY_Control_R:
case GDK_KEY_Meta_L: case GDK_KEY_Meta_R:
{
GdkModifierType key;
key = pika_display_shell_key_to_state (kevent->keyval);
state |= key;
if (! pika_image_is_empty (image))
tool_manager_modifier_state_active (pika, state, display);
}
break;
}
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
}
}
break;
case GDK_KEY_RELEASE:
{
GdkEventKey *kevent = (GdkEventKey *) event;
PikaTool *active_tool;
active_tool = tool_manager_get_active (pika);
if (shell->mod_action == PIKA_MODIFIER_ACTION_LAYER_PICKING)
{
/* As a special exception, we finalize the layer picking
* action in the key release event. This allows one to
* click multiple times and keep a state of the last picked
* layer.
* */
PikaStatusbar *statusbar;
statusbar = pika_display_shell_get_statusbar (shell);
pika_statusbar_pop_temp (statusbar);
shell->picked_layer = NULL;
shell->mod_action = PIKA_MODIFIER_ACTION_NONE;
}
else if (shell->mod_action != PIKA_MODIFIER_ACTION_NONE &&
(state & pika_get_all_modifiers_mask ()) == 0)
{
pika_display_shell_stop_scrolling (shell, event);
}
if ((state & GDK_BUTTON1_MASK) &&
(! shell->space_release_pending ||
(kevent->keyval != GDK_KEY_space &&
kevent->keyval != GDK_KEY_KP_Space)))
{
if (kevent->keyval == GDK_KEY_Alt_L ||
kevent->keyval == GDK_KEY_Alt_R ||
kevent->keyval == GDK_KEY_Shift_L ||
kevent->keyval == GDK_KEY_Shift_R ||
kevent->keyval == GDK_KEY_Control_L ||
kevent->keyval == GDK_KEY_Control_R ||
kevent->keyval == GDK_KEY_Meta_L ||
kevent->keyval == GDK_KEY_Meta_R)
{
GdkModifierType key;
key = pika_display_shell_key_to_state (kevent->keyval);
state &= ~key;
if (active_tool &&
pika_tool_control_is_active (active_tool->control) &&
! pika_image_is_empty (image))
{
tool_manager_active_modifier_state_active (pika, state,
display);
}
}
}
else
{
tool_manager_focus_display_active (pika, display);
if (pika_tool_control_get_wants_all_key_events (active_tool->control))
{
if (tool_manager_key_release_active (pika, kevent, display))
{
/* FIXME: need to do some of the stuff below, like
* calling oper_update()
*/
return TRUE;
}
}
if (! gtk_widget_has_focus (shell->canvas))
{
/* The event was in an overlay widget and not handled
* there, make sure the overlay widgets are keyboard
* navigatable by letting the generic widget handlers
* deal with the event.
*/
return FALSE;
}
switch (kevent->keyval)
{
case GDK_KEY_space:
case GDK_KEY_KP_Space:
if ((state & GDK_BUTTON1_MASK))
{
shell->button1_release_pending = TRUE;
shell->space_release_pending = FALSE;
/* We need to ungrab the pointer in order to catch
* button release events.
*/
if (shell->grab_pointer)
pika_display_shell_pointer_ungrab (shell, event);
}
else
{
pika_display_shell_released (shell, event, NULL);
}
return_val = TRUE;
break;
/* Update the state based on modifiers being pressed */
case GDK_KEY_Alt_L: case GDK_KEY_Alt_R:
case GDK_KEY_Shift_L: case GDK_KEY_Shift_R:
case GDK_KEY_Control_L: case GDK_KEY_Control_R:
case GDK_KEY_Meta_L: case GDK_KEY_Meta_R:
{
GdkModifierType key;
key = pika_display_shell_key_to_state (kevent->keyval);
state &= ~key;
/* For all modifier keys: call the tools
* modifier_state *and* oper_update method so tools
* can choose if they are interested in the press
* itself or only in the resulting state
*/
if (! pika_image_is_empty (image))
tool_manager_modifier_state_active (pika, state, display);
}
break;
}
tool_manager_oper_update_active (pika,
&image_coords, state,
shell->proximity,
display);
}
}
break;
default:
break;
}
/* if we reached this point in pika_busy mode, return now */
if (pika->busy)
return return_val;
/* cursor update */
pika_display_shell_update_cursor (shell, &display_coords, &image_coords,
state, update_sw_cursor);
return return_val;
}
void
pika_display_shell_canvas_grab_notify (GtkWidget *canvas,
gboolean was_grabbed,
PikaDisplayShell *shell)
{
PikaDisplay *display;
PikaImage *image;
Pika *pika;
/* are we in destruction? */
if (! shell->display || ! pika_display_get_shell (shell->display))
return;
display = shell->display;
pika = pika_display_get_pika (display);
image = pika_display_get_image (display);
if (! image)
return;
PIKA_LOG (TOOL_EVENTS, "grab_notify (display %p): was_grabbed = %s",
display, was_grabbed ? "TRUE" : "FALSE");
if (! was_grabbed)
{
if (! pika_image_is_empty (image))
{
PikaTool *active_tool = tool_manager_get_active (pika);
if (active_tool && active_tool->focus_display == display)
{
tool_manager_modifier_state_active (pika, 0, display);
}
}
}
}
/* The ratio of the following defines what finger movement we interpret as
* a rotation versus zoom gesture. If finger movement is partially a zoom
* and partially a rotation, the detected gesture will be whichever gesture
* we detect first
*
* Let's define "finger movement angle" as the angle between the direction of
* finger movement and the line between fingers. If this angle is zero then
* the gesture is completely a zoom gesture. If this angle is 90 degrees
* then the gesture is completely a rotation gesture.
*
* The boundary finger movement angle (below which the gesture is zoom gesture
* and above which the gesture is rotate gesture) will be defined as follows:
*
* boundary = arctan(deg2rad(ROTATE_GESTURE_ACTIVATION_DEG_DIFF) /
* (ZOOM_GESTURE_ACTIVATION_SCALE_DIFF / 2))
*
* Note that ZOOM_GESTURE_ACTIVATION_SCALE_DIFF needs to be divided by 2
* because both fingers are moving so the distance between them is increasing
* twice as fast.
*
* We probably want boundary angle to be around 60 degrees to prevent
* accidentally starting rotations.
*
* With ZOOM_GESTURE_ACTIVATION_SCALE_DIFF==0.02 and
* ROTATE_GESTURE_ACTIVATION_DEG_DIFF==1 boundary is 60.2 degrees.
*/
#define ZOOM_GESTURE_ACTIVATION_SCALE_DIFF 0.02
#define ROTATE_GESTURE_ACTIVATION_DEG_DIFF 1
void
pika_display_shell_zoom_gesture_begin (GtkGestureZoom *gesture,
GdkEventSequence *sequence,
PikaDisplayShell *shell)
{
shell->last_zoom_scale = gtk_gesture_zoom_get_scale_delta (gesture);
}
void
pika_display_shell_zoom_gesture_update (GtkGestureZoom *gesture,
GdkEventSequence *sequence,
PikaDisplayShell *shell)
{
gdouble current_scale;
gdouble delta;
if (shell->rotate_gesture_active)
return;
/* we only activate zoom gesture handling if rotate gesture was inactive and
* the zoom difference is significant enough */
current_scale = gtk_gesture_zoom_get_scale_delta (gesture);
if (!shell->zoom_gesture_active &&
current_scale > (1 - ZOOM_GESTURE_ACTIVATION_SCALE_DIFF) &&
current_scale < (1 + ZOOM_GESTURE_ACTIVATION_SCALE_DIFF))
return;
shell->zoom_gesture_active = TRUE;
delta = (current_scale - shell->last_zoom_scale) / shell->last_zoom_scale;
shell->last_zoom_scale = current_scale;
pika_display_shell_scale (shell,
PIKA_ZOOM_PINCH,
delta,
PIKA_ZOOM_FOCUS_POINTER);
}
void
pika_display_shell_zoom_gesture_end (GtkGestureZoom *gesture,
GdkEventSequence *sequence,
PikaDisplayShell *shell)
{
shell->zoom_gesture_active = FALSE;
}
void
pika_display_shell_rotate_gesture_begin (GtkGestureRotate *gesture,
GdkEventSequence *sequence,
PikaDisplayShell *shell)
{
shell->initial_gesture_rotate_angle = shell->rotate_angle;
shell->last_gesture_rotate_state = 0;
pika_display_shell_rotate_gesture_maybe_get_state (gesture, sequence,
&shell->last_gesture_rotate_state);
}
void
pika_display_shell_rotate_gesture_update (GtkGestureRotate *gesture,
GdkEventSequence *sequence,
PikaDisplayShell *shell)
{
gdouble angle;
gdouble angle_delta_deg;
gboolean constrain;
/* we only activate rotate gesture handling if zoom gesture was inactive and
* the rotation is significant enough */
if (shell->zoom_gesture_active)
return;
angle_delta_deg = 180.0 * gtk_gesture_rotate_get_angle_delta (gesture) / G_PI;
if (!shell->rotate_gesture_active &&
angle_delta_deg > -ROTATE_GESTURE_ACTIVATION_DEG_DIFF &&
angle_delta_deg < ROTATE_GESTURE_ACTIVATION_DEG_DIFF)
return;
shell->rotate_gesture_active = TRUE;
angle = shell->initial_gesture_rotate_angle + angle_delta_deg;
pika_display_shell_rotate_gesture_maybe_get_state (gesture, sequence,
&shell->last_gesture_rotate_state);
constrain = (shell->last_gesture_rotate_state & GDK_CONTROL_MASK) ? TRUE : FALSE;
pika_display_shell_rotate_to (shell, constrain ? RINT (angle / 15.0) * 15.0 : angle);
}
void
pika_display_shell_rotate_gesture_end (GtkGestureRotate *gesture,
GdkEventSequence *sequence,
PikaDisplayShell *shell)
{
shell->rotate_gesture_active = FALSE;
}
void
pika_display_shell_buffer_stroke (PikaMotionBuffer *buffer,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplayShell *shell)
{
PikaDisplay *display = shell->display;
Pika *pika = pika_display_get_pika (display);
PikaTool *active_tool;
active_tool = tool_manager_get_active (pika);
if (active_tool &&
pika_tool_control_is_active (active_tool->control))
{
tool_manager_motion_active (pika,
coords, time, state,
display);
}
}
void
pika_display_shell_buffer_hover (PikaMotionBuffer *buffer,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplayShell *shell)
{
PikaDisplay *display = shell->display;
Pika *pika = pika_display_get_pika (display);
PikaTool *active_tool;
active_tool = tool_manager_get_active (pika);
if (active_tool &&
! pika_tool_control_is_active (active_tool->control))
{
tool_manager_oper_update_active (pika,
coords, state, proximity,
display);
}
}
static gboolean
pika_display_shell_ruler_button_press (GtkWidget *widget,
GdkEventButton *event,
PikaDisplayShell *shell,
PikaOrientationType orientation)
{
PikaDisplay *display = shell->display;
if (display->pika->busy)
return TRUE;
if (! pika_display_get_image (display))
return TRUE;
if (event->type == GDK_BUTTON_PRESS && event->button == 1)
{
PikaTool *active_tool = tool_manager_get_active (display->pika);
if (active_tool)
{
pika_display_shell_update_focus (shell, TRUE,
NULL, event->state);
if (pika_display_shell_pointer_grab (shell, (GdkEvent *) event,
GDK_POINTER_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK))
{
if (event->state & pika_get_toggle_behavior_mask ())
{
pika_sample_point_tool_start_new (active_tool, display);
}
else
{
pika_guide_tool_start_new (active_tool, display,
orientation);
}
return TRUE;
}
}
}
return FALSE;
}
gboolean
pika_display_shell_hruler_button_press (GtkWidget *widget,
GdkEventButton *event,
PikaDisplayShell *shell)
{
return pika_display_shell_ruler_button_press (widget, event, shell,
PIKA_ORIENTATION_HORIZONTAL);
}
gboolean
pika_display_shell_vruler_button_press (GtkWidget *widget,
GdkEventButton *event,
PikaDisplayShell *shell)
{
return pika_display_shell_ruler_button_press (widget, event, shell,
PIKA_ORIENTATION_VERTICAL);
}
/* private functions */
static GdkModifierType
pika_display_shell_key_to_state (gint key)
{
/* FIXME: need some proper GDK API to figure this */
switch (key)
{
case GDK_KEY_Alt_L:
case GDK_KEY_Alt_R:
return GDK_MOD1_MASK;
case GDK_KEY_Shift_L:
case GDK_KEY_Shift_R:
return GDK_SHIFT_MASK;
case GDK_KEY_Control_L:
case GDK_KEY_Control_R:
return GDK_CONTROL_MASK;
#ifdef GDK_WINDOWING_QUARTZ
case GDK_KEY_Meta_L:
case GDK_KEY_Meta_R:
return GDK_MOD2_MASK;
#endif
default:
return 0;
}
}
static GdkModifierType
pika_display_shell_button_to_state (gint button)
{
if (button == 1)
return GDK_BUTTON1_MASK;
else if (button == 2)
return GDK_BUTTON2_MASK;
else if (button == 3)
return GDK_BUTTON3_MASK;
return 0;
}
static void
pika_display_shell_proximity_in (PikaDisplayShell *shell)
{
if (! shell->proximity)
{
shell->proximity = TRUE;
pika_display_shell_check_device_cursor (shell);
}
}
static void
pika_display_shell_proximity_out (PikaDisplayShell *shell)
{
if (shell->proximity)
{
shell->proximity = FALSE;
pika_display_shell_clear_software_cursor (shell);
}
}
static gboolean
pika_display_shell_check_device (PikaDisplayShell *shell,
GdkEvent *event,
gboolean *device_changed)
{
Pika *pika = pika_display_get_pika (shell->display);
GdkDevice *device;
GdkDevice *grab_device;
/* Find out what device the event occurred upon */
device = pika_devices_get_from_event (pika, event, &grab_device);
if (device)
{
/* While we have a grab, ignore all events from all other devices
* of the same type
*/
if (event->type != GDK_KEY_PRESS &&
event->type != GDK_KEY_RELEASE &&
event->type != GDK_FOCUS_CHANGE)
{
if ((shell->grab_pointer && (shell->grab_pointer != grab_device)) ||
(shell->grab_pointer_source && (shell->grab_pointer_source != device)))
{
PIKA_LOG (TOOL_EVENTS,
"ignoring pointer event from '%s' while waiting for event from '%s'\n",
gdk_device_get_name (device),
gdk_device_get_name (shell->grab_pointer_source));
return TRUE;
}
}
if (! pika->busy && pika_devices_check_change (pika, device))
{
pika_display_shell_check_device_cursor (shell);
*device_changed = TRUE;
}
}
return FALSE;
}
static void
pika_display_shell_check_device_cursor (PikaDisplayShell *shell)
{
PikaDeviceManager *manager;
PikaDeviceInfo *current_device;
manager = pika_devices_get_manager (shell->display->pika);
current_device = pika_device_manager_get_current_device (manager);
shell->draw_cursor = ! pika_device_info_has_cursor (current_device);
}
static void
pika_display_shell_start_scrolling (PikaDisplayShell *shell,
const GdkEvent *event,
GdkModifierType state,
gint x,
gint y)
{
PikaModifierAction mod_action = shell->mod_action;
if (mod_action == PIKA_MODIFIER_ACTION_NONE && shell->space_release_pending)
{
/* XXX The space actions are still hard-coded (instead of
* customizable throguh PikaModifiersManager). It might be
* interesting to make them customizable later.
*/
GdkModifierType state = 0;
gdk_event_get_state (event, &state);
state &= pika_get_all_modifiers_mask ();
if (state == 0)
mod_action = PIKA_MODIFIER_ACTION_PANNING;
else if (state == pika_get_extend_selection_mask ())
mod_action = PIKA_MODIFIER_ACTION_ROTATING;
else if (state == (pika_get_extend_selection_mask () | GDK_CONTROL_MASK))
mod_action = PIKA_MODIFIER_ACTION_STEP_ROTATING;
else if (state == pika_get_toggle_behavior_mask ())
mod_action = PIKA_MODIFIER_ACTION_ZOOMING;
}
shell->scroll_start_x = x;
shell->scroll_start_y = y;
shell->scroll_last_x = x;
shell->scroll_last_y = y;
shell->rotate_drag_angle = shell->rotate_angle;
switch (mod_action)
{
case PIKA_MODIFIER_ACTION_ROTATING:
case PIKA_MODIFIER_ACTION_STEP_ROTATING:
pika_display_shell_set_override_cursor (shell,
(PikaCursorType) GDK_EXCHANGE);
break;
case PIKA_MODIFIER_ACTION_ZOOMING:
pika_display_shell_set_override_cursor (shell,
(PikaCursorType) PIKA_CURSOR_ZOOM);
break;
case PIKA_MODIFIER_ACTION_LAYER_PICKING:
{
PikaImage *image = pika_display_get_image (shell->display);
PikaLayer *layer;
PikaCoords image_coords;
PikaCoords display_coords;
guint32 time;
pika_display_shell_set_override_cursor (shell,
(PikaCursorType) PIKA_CURSOR_CROSSHAIR);
pika_display_shell_get_event_coords (shell, event,
&display_coords,
&state, &time);
pika_display_shell_untransform_event_coords (shell,
&display_coords, &image_coords,
NULL);
layer = pika_image_pick_layer (image,
(gint) image_coords.x,
(gint) image_coords.y,
shell->picked_layer);
if (layer && ! pika_image_get_floating_selection (image))
{
GList *layers = pika_image_get_selected_layers (image);
if (g_list_length (layers) != 1 || layer != layers->data)
{
PikaStatusbar *statusbar;
layers = g_list_prepend (NULL, layer);
pika_image_set_selected_layers (image, layers);
g_list_free (layers);
statusbar = pika_display_shell_get_statusbar (shell);
pika_statusbar_push_temp (statusbar, PIKA_MESSAGE_INFO,
PIKA_ICON_LAYER,
_("Layer picked: '%s'"),
pika_object_get_name (layer));
}
shell->picked_layer = layer;
}
}
break;
case PIKA_MODIFIER_ACTION_BRUSH_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_BRUSH_RADIUS_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_TOOL_OPACITY:
{
Pika *pika = pika_display_get_pika (shell->display);
PikaTool *active_tool = tool_manager_get_active (pika);
if (PIKA_IS_PAINT_TOOL (active_tool))
pika_paint_tool_force_draw (PIKA_PAINT_TOOL (active_tool), TRUE);
}
case PIKA_MODIFIER_ACTION_MENU:
case PIKA_MODIFIER_ACTION_PANNING:
case PIKA_MODIFIER_ACTION_ACTION:
case PIKA_MODIFIER_ACTION_NONE:
pika_display_shell_set_override_cursor (shell,
(PikaCursorType) GDK_FLEUR);
break;
}
}
static void
pika_display_shell_stop_scrolling (PikaDisplayShell *shell,
const GdkEvent *event)
{
pika_display_shell_unset_override_cursor (shell);
switch (shell->mod_action)
{
case PIKA_MODIFIER_ACTION_BRUSH_PIXEL_SIZE:
case PIKA_MODIFIER_ACTION_BRUSH_RADIUS_PIXEL_SIZE:
{
Pika *pika = pika_display_get_pika (shell->display);
PikaTool *active_tool = tool_manager_get_active (pika);
if (PIKA_IS_PAINT_TOOL (active_tool))
pika_paint_tool_force_draw (PIKA_PAINT_TOOL (active_tool), FALSE);
}
break;
default:
break;
}
shell->mod_action = PIKA_MODIFIER_ACTION_NONE;
shell->scroll_start_x = 0;
shell->scroll_start_y = 0;
shell->scroll_last_x = 0;
shell->scroll_last_y = 0;
shell->rotate_drag_angle = 0.0;
}
static void
pika_display_shell_handle_scrolling (PikaDisplayShell *shell,
GdkModifierType state,
gint x,
gint y)
{
PikaModifierAction mod_action = shell->mod_action;
gboolean constrain = FALSE;
gboolean size_update_pos = TRUE;
gdouble size_multiplier = 1.0;
if (mod_action == PIKA_MODIFIER_ACTION_NONE && shell->space_release_pending)
{
state &= pika_get_all_modifiers_mask ();
if (state == 0)
mod_action = PIKA_MODIFIER_ACTION_PANNING;
else if (state == pika_get_extend_selection_mask ())
mod_action = PIKA_MODIFIER_ACTION_ROTATING;
else if (state == (pika_get_extend_selection_mask () | GDK_CONTROL_MASK))
mod_action = PIKA_MODIFIER_ACTION_STEP_ROTATING;
else if (state == pika_get_toggle_behavior_mask ())
mod_action = PIKA_MODIFIER_ACTION_ZOOMING;
}
else if (mod_action == PIKA_MODIFIER_ACTION_ROTATING ||
mod_action == PIKA_MODIFIER_ACTION_STEP_ROTATING)
{
state &= pika_get_all_modifiers_mask ();
/* Allow switching from the constrained to non-constrained
* variant, back and forth, during a single scroll.
*/
if (state == pika_get_extend_selection_mask ())
mod_action = PIKA_MODIFIER_ACTION_ROTATING;
else if (state == (pika_get_extend_selection_mask () | GDK_CONTROL_MASK))
mod_action = PIKA_MODIFIER_ACTION_STEP_ROTATING;
}
switch (mod_action)
{
case PIKA_MODIFIER_ACTION_STEP_ROTATING:
constrain = TRUE;
case PIKA_MODIFIER_ACTION_ROTATING:
pika_display_shell_rotate_drag (shell,
shell->scroll_last_x,
shell->scroll_last_y,
x,
y,
constrain);
break;
case PIKA_MODIFIER_ACTION_ZOOMING:
pika_display_shell_scale_drag (shell,
shell->scroll_start_x,
shell->scroll_start_y,
shell->scroll_last_x - x,
shell->scroll_last_y - y);
break;
case PIKA_MODIFIER_ACTION_BRUSH_RADIUS_PIXEL_SIZE:
size_multiplier = 2.0;
size_update_pos = FALSE;
case PIKA_MODIFIER_ACTION_BRUSH_PIXEL_SIZE:
{
PikaDisplay *display = shell->display;
Pika *pika = pika_display_get_pika (display);
PikaTool *active_tool = tool_manager_get_active (pika);
const gchar *action;
gint size;
/* Size in image pixels: distance between start and current
* position.
*/
size = (gint) (sqrt (pow ((x - shell->scroll_start_x) / shell->scale_x, 2) +
pow ((y - shell->scroll_start_y) / shell->scale_y, 2)));
/* TODO: different logics with "lock brush to view". */
/* TODO 2: scale aware? */
action = pika_tool_control_get_action_pixel_size (active_tool->control);
if (action)
{
pika_display_shell_activate_action (pika, action,
g_variant_new_double ((gdouble) size * size_multiplier));
if (size_update_pos)
{
PikaCoords display_coords;
PikaCoords coords;
display_coords.x = shell->scroll_start_x + (x - shell->scroll_start_x) / 2;
display_coords.y = shell->scroll_start_y + (y - shell->scroll_start_y) / 2;
pika_display_shell_untransform_event_coords (shell,
&display_coords, &coords,
NULL);
pika_tool_oper_update (active_tool, &coords, 0, TRUE, display);
}
}
else
{
action = pika_tool_control_get_action_size (active_tool->control);
if (action)
{
/* Special trick with these enum actions. If using any
* positive value, we get the PIKA_ACTION_SELECT_SET behavior
* which sets to the given value.
*/
pika_display_shell_activate_action (pika, action,
g_variant_new_int32 (size));
}
}
}
break;
case PIKA_MODIFIER_ACTION_TOOL_OPACITY:
{
PikaDisplay *display = shell->display;
Pika *pika = pika_display_get_pika (display);
PikaTool *active_tool = tool_manager_get_active (pika);
const gchar *action;
gint size;
/* Size in image pixels: distance between start and current
* position.
*/
size = (gint) (sqrt (pow ((x - shell->scroll_start_x) / shell->scale_x, 2) +
pow ((y - shell->scroll_start_y) / shell->scale_y, 2)));
action = pika_tool_control_get_action_opacity (active_tool->control);
if (action)
{
/* Special trick with these enum actions. If using any
* positive value, we get the PIKA_ACTION_SELECT_SET behavior
* which sets to the given value.
*/
pika_display_shell_activate_action (pika, action,
g_variant_new_int32 (size));
}
}
break;
case PIKA_MODIFIER_ACTION_PANNING:
pika_display_shell_scroll (shell,
shell->scroll_last_x - x,
shell->scroll_last_y - y);
break;
case PIKA_MODIFIER_ACTION_LAYER_PICKING:
/* Do nothing. We only pick the layer on click. */
case PIKA_MODIFIER_ACTION_MENU:
case PIKA_MODIFIER_ACTION_NONE:
case PIKA_MODIFIER_ACTION_ACTION:
break;
}
shell->scroll_last_x = x;
shell->scroll_last_y = y;
}
static void
pika_display_shell_rotate_gesture_maybe_get_state (GtkGestureRotate *gesture,
GdkEventSequence *sequence,
guint *maybe_out_state)
{
/* The only way to get any access to any data about events handled by the
* GtkGestureRotate is through its last_event. The set of events handled by
* GtkGestureRotate is not fully defined so we can't guarantee that last_event
* will be of event type that has a state field (though touch and gesture
* events do have that).
*
* Usually this would not be a problem, but when handling a gesture we don't
* want to repeatedly switch between a valid state and its default value if
* last_event happens to not have it. Thus we store the last valid state
* and only update it if we get a valid state from last_event.
*/
guint state = 0;
const GdkEvent *last_event;
last_event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
if (last_event == NULL)
return;
if (gdk_event_get_state (last_event, &state))
*maybe_out_state = state;
}
static void
pika_display_shell_space_pressed (PikaDisplayShell *shell,
const GdkEvent *event)
{
Pika *pika = pika_display_get_pika (shell->display);
if (shell->space_release_pending || shell->mod_action != PIKA_MODIFIER_ACTION_NONE)
return;
shell->space_release_pending = TRUE;
switch (shell->display->config->space_bar_action)
{
case PIKA_SPACE_BAR_ACTION_NONE:
break;
case PIKA_SPACE_BAR_ACTION_PAN:
{
PikaDeviceManager *manager;
PikaDeviceInfo *current_device;
PikaCoords coords;
GdkModifierType state = 0;
manager = pika_devices_get_manager (pika);
current_device = pika_device_manager_get_current_device (manager);
pika_device_info_get_device_coords (current_device,
gtk_widget_get_window (shell->canvas),
&coords);
gdk_event_get_state (event, &state);
pika_display_shell_start_scrolling (shell, event, state,
coords.x, coords.y);
}
break;
case PIKA_SPACE_BAR_ACTION_MOVE:
{
PikaTool *active_tool = tool_manager_get_active (pika);
if (active_tool || ! PIKA_IS_MOVE_TOOL (active_tool))
{
GdkModifierType state;
shell->space_shaded_tool =
pika_object_get_name (active_tool->tool_info);
pika_context_set_tool (pika_get_user_context (pika),
pika_get_tool_info (pika, "pika-move-tool"));
gdk_event_get_state (event, &state);
pika_display_shell_update_focus (shell, TRUE,
NULL, state);
}
}
break;
}
}
static void
pika_display_shell_released (PikaDisplayShell *shell,
const GdkEvent *event,
const PikaCoords *image_coords)
{
Pika *pika = pika_display_get_pika (shell->display);
if (! shell->space_release_pending &&
! shell->button1_release_pending)
return;
switch (shell->display->config->space_bar_action)
{
case PIKA_SPACE_BAR_ACTION_NONE:
break;
case PIKA_SPACE_BAR_ACTION_PAN:
pika_display_shell_stop_scrolling (shell, event);
break;
case PIKA_SPACE_BAR_ACTION_MOVE:
if (shell->space_shaded_tool)
{
pika_context_set_tool (pika_get_user_context (pika),
pika_get_tool_info (pika,
shell->space_shaded_tool));
shell->space_shaded_tool = NULL;
if (gtk_widget_has_focus (shell->canvas))
{
GdkModifierType state;
gdk_event_get_state (event, &state);
pika_display_shell_update_focus (shell, TRUE,
image_coords, state);
}
else
{
pika_display_shell_update_focus (shell, FALSE,
image_coords, 0);
}
}
break;
}
shell->space_release_pending = FALSE;
shell->button1_release_pending = FALSE;
}
static gboolean
pika_display_shell_tab_pressed (PikaDisplayShell *shell,
const GdkEventKey *kevent)
{
PikaUIManager *manager = menus_get_image_manager_singleton (shell->display->pika);
PikaImage *image = pika_display_get_image (shell->display);
if (kevent->state & GDK_CONTROL_MASK)
{
if (image && ! pika_image_is_empty (image))
{
if (kevent->keyval == GDK_KEY_Tab ||
kevent->keyval == GDK_KEY_KP_Tab)
pika_display_shell_layer_select_init (shell, (GdkEvent *) kevent,
1);
else
pika_display_shell_layer_select_init (shell, (GdkEvent *) kevent,
-1);
return TRUE;
}
}
else if (kevent->state & GDK_MOD1_MASK)
{
if (image)
{
if (kevent->keyval == GDK_KEY_Tab ||
kevent->keyval == GDK_KEY_KP_Tab)
pika_ui_manager_activate_action (manager, "windows",
"windows-show-display-next");
else
pika_ui_manager_activate_action (manager, "windows",
"windows-show-display-previous");
return TRUE;
}
}
else
{
pika_ui_manager_activate_action (manager, "windows",
"windows-hide-docks");
return TRUE;
}
return FALSE;
}
static void
pika_display_shell_update_focus (PikaDisplayShell *shell,
gboolean focus_in,
const PikaCoords *image_coords,
GdkModifierType state)
{
Pika *pika = pika_display_get_pika (shell->display);
if (focus_in)
{
tool_manager_focus_display_active (pika, shell->display);
tool_manager_modifier_state_active (pika, state, shell->display);
}
else
{
tool_manager_focus_display_active (pika, NULL);
}
if (image_coords)
tool_manager_oper_update_active (pika,
image_coords, state,
shell->proximity,
shell->display);
}
static void
pika_display_shell_update_cursor (PikaDisplayShell *shell,
const PikaCoords *display_coords,
const PikaCoords *image_coords,
GdkModifierType state,
gboolean update_software_cursor)
{
PikaDisplay *display = shell->display;
Pika *pika = pika_display_get_pika (display);
PikaImage *image = pika_display_get_image (display);
PikaTool *active_tool;
if (! shell->display->config->cursor_updating)
return;
active_tool = tool_manager_get_active (pika);
if (active_tool && image)
{
if ((! pika_image_is_empty (image) ||
pika_tool_control_get_handle_empty_image (active_tool->control)) &&
! (state & (GDK_BUTTON1_MASK |
GDK_BUTTON2_MASK |
GDK_BUTTON3_MASK)))
{
tool_manager_cursor_update_active (pika,
image_coords, state,
display);
}
else if (pika_image_is_empty (image) &&
! pika_tool_control_get_handle_empty_image (active_tool->control))
{
pika_display_shell_set_cursor (shell,
PIKA_CURSOR_MOUSE,
pika_tool_control_get_tool_cursor (active_tool->control),
PIKA_CURSOR_MODIFIER_BAD);
}
}
else
{
pika_display_shell_set_cursor (shell,
PIKA_CURSOR_MOUSE,
PIKA_TOOL_CURSOR_NONE,
PIKA_CURSOR_MODIFIER_BAD);
}
if (update_software_cursor)
{
PikaCursorPrecision precision = PIKA_CURSOR_PRECISION_PIXEL_CENTER;
if (active_tool)
precision = pika_tool_control_get_precision (active_tool->control);
pika_display_shell_update_software_cursor (shell,
precision,
(gint) display_coords->x,
(gint) display_coords->y,
image_coords->x,
image_coords->y);
}
}
static gboolean
pika_display_shell_initialize_tool (PikaDisplayShell *shell,
const PikaCoords *image_coords,
GdkModifierType state)
{
PikaDisplay *display = shell->display;
PikaImage *image = pika_display_get_image (display);
Pika *pika = pika_display_get_pika (display);
gboolean initialized = FALSE;
PikaTool *active_tool;
active_tool = tool_manager_get_active (pika);
if (active_tool &&
(! pika_image_is_empty (image) ||
pika_tool_control_get_handle_empty_image (active_tool->control)))
{
/* initialize the current tool if it has no drawables */
if (! active_tool->drawables)
{
initialized = tool_manager_initialize_active (pika, display);
}
else if (! pika_image_equal_selected_drawables (image, active_tool->drawables) &&
(! pika_tool_control_get_preserve (active_tool->control) &&
(pika_tool_control_get_dirty_mask (active_tool->control) &
PIKA_DIRTY_ACTIVE_DRAWABLE)))
{
PikaProcedure *procedure = g_object_get_data (G_OBJECT (active_tool),
"pika-gegl-procedure");
if (image == pika_item_get_image (PIKA_ITEM (active_tool->drawables->data)))
{
/* When changing between drawables if the *same* image,
* stop the tool using its dirty action, so it doesn't
* get committed on tool change, in case its dirty action
* is HALT. This is a pure "probably better this way"
* decision because the user is likely changing their
* mind or was simply on the wrong layer. See bug #776370.
*
* See also issues #1180 and #1202 for cases where we
* actually *don't* want to halt the tool here, but rather
* commit it, hence the use of the tool's dirty action.
*/
tool_manager_control_active (
pika,
pika_tool_control_get_dirty_action (active_tool->control),
active_tool->display);
}
if (procedure)
{
/* We can't just recreate an operation tool, we must
* make sure the right stuff gets set on it, so
* re-activate the procedure that created it instead of
* just calling pika_context_tool_changed(). See
* PikaGeglProcedure and bug #776370.
*/
PikaUIManager *manager;
manager = menus_get_image_manager_singleton (shell->display->pika);
pika_filter_history_add (pika, procedure);
pika_ui_manager_activate_action (manager, "filters",
"filters-reshow");
/* the procedure already initialized the tool; don't
* reinitialize it below, since this can lead to errors.
*/
initialized = TRUE;
}
else
{
/* create a new one, deleting the current */
pika_context_tool_changed (pika_get_user_context (pika));
}
/* make sure the newly created tool has the right state */
pika_display_shell_update_focus (shell, TRUE, image_coords, state);
if (! initialized)
initialized = tool_manager_initialize_active (pika, display);
}
else
{
initialized = TRUE;
}
}
return initialized;
}
static void
pika_display_shell_get_event_coords (PikaDisplayShell *shell,
const GdkEvent *event,
PikaCoords *display_coords,
GdkModifierType *state,
guint32 *time)
{
Pika *pika = pika_display_get_pika (shell->display);
PikaDeviceManager *manager;
PikaDeviceInfo *current_device;
manager = pika_devices_get_manager (pika);
current_device = pika_device_manager_get_current_device (manager);
pika_device_info_get_event_coords (current_device,
gtk_widget_get_window (shell->canvas),
event,
display_coords);
pika_device_info_get_event_state (current_device,
gtk_widget_get_window (shell->canvas),
event,
state);
*time = gdk_event_get_time (event);
}
static void
pika_display_shell_untransform_event_coords (PikaDisplayShell *shell,
const PikaCoords *display_coords,
PikaCoords *image_coords,
gboolean *update_software_cursor)
{
Pika *pika = pika_display_get_pika (shell->display);
PikaTool *active_tool;
/* PikaCoords passed to tools are ALWAYS in image coordinates */
pika_display_shell_untransform_coords (shell,
display_coords,
image_coords);
active_tool = tool_manager_get_active (pika);
if (active_tool && pika_tool_control_get_snap_to (active_tool->control))
{
gint x, y, width, height;
pika_tool_control_get_snap_offsets (active_tool->control,
&x, &y, &width, &height);
if (pika_display_shell_snap_coords (shell,
image_coords,
x, y, width, height))
{
if (update_software_cursor)
*update_software_cursor = TRUE;
}
}
}
static void
pika_display_shell_activate_action (Pika *pika,
const gchar *action_name,
GVariant *value)
{
g_return_if_fail (action_name != NULL);
if (action_name)
{
GAction *action;
action = g_action_map_lookup_action (G_ACTION_MAP (pika->app), action_name);
if (action == NULL)
{
g_printerr ("%s: ignoring unknown action '%s'.\n",
G_STRFUNC, action_name);
}
else if (PIKA_IS_ENUM_ACTION (action) &&
PIKA_ENUM_ACTION (action)->value_variable)
{
pika_action_emit_activate (PIKA_ACTION (action), value);
}
else if (PIKA_IS_DOUBLE_ACTION (action))
{
pika_action_emit_activate (PIKA_ACTION (action), value);
}
else
{
pika_action_activate (PIKA_ACTION (action));
}
}
}
/* Replace gdk_event_triggers_context_menu() as we don't want to trigger
* anymore on right click, as we have our own system.
* But we trigger with %GDK_MODIFIER_INTENT_CONTEXT_MENU mask.
*/
static gboolean
pika_display_triggers_context_menu (const GdkEvent *event,
PikaDisplayShell *shell,
Pika *pika,
const PikaCoords *image_coords,
gboolean force)
{
if (event->type == GDK_BUTTON_PRESS)
{
const GdkEventButton *bevent = (const GdkEventButton *) event;
gboolean triggers = force;
g_return_val_if_fail (GDK_IS_WINDOW (bevent->window), FALSE);
if (! force)
{
GdkDisplay *display;
GdkModifierType modifier;
display = gdk_window_get_display (bevent->window);
modifier = gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display),
GDK_MODIFIER_INTENT_CONTEXT_MENU);
triggers = (modifier != 0 &&
bevent->button == GDK_BUTTON_PRIMARY &&
! (bevent->state & (GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)) &&
(bevent->state & modifier));
}
if (triggers)
{
PikaUIManager *ui_manager;
const gchar *ui_path;
ui_manager = tool_manager_get_popup_active (pika,
image_coords,
bevent->state,
shell->display,
&ui_path);
if (! ui_manager)
{
ui_manager = shell->popup_manager;
ui_path = "/image-menubar";
}
pika_ui_manager_ui_popup_at_pointer (ui_manager, ui_path,
GTK_WIDGET (shell),
event, NULL, NULL);
return TRUE;
}
}
return FALSE;
}
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