PIKApp/app/widgets/pikacellrendererviewable.c

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2023-09-26 00:35:21 +02:00
/* 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
*
* pikacellrendererviewable.c
* Copyright (C) 2003 Michael Natterer <mitch@gimp.org>
*
* 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 <gegl.h>
#include <gtk/gtk.h>
#include "widgets-types.h"
#include "libpikabase/pikabase.h"
#include "core/pikamarshal.h"
#include "core/pikaviewable.h"
#include "pikacellrendererviewable.h"
#include "pikaview-popup.h"
#include "pikaviewrenderer.h"
enum
{
PRE_CLICKED,
CLICKED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_RENDERER
};
static void pika_cell_renderer_viewable_finalize (GObject *object);
static void pika_cell_renderer_viewable_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void pika_cell_renderer_viewable_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void pika_cell_renderer_viewable_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *rectangle,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height);
static void pika_cell_renderer_viewable_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
static gboolean pika_cell_renderer_viewable_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
G_DEFINE_TYPE (PikaCellRendererViewable, pika_cell_renderer_viewable,
GTK_TYPE_CELL_RENDERER)
#define parent_class pika_cell_renderer_viewable_parent_class
static guint viewable_cell_signals[LAST_SIGNAL] = { 0 };
static void
pika_cell_renderer_viewable_class_init (PikaCellRendererViewableClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
/**
* PikaCellRendererViewable::pre-clicked:
* @cell:
* @path:
* @state:
*
* Called early on a viewable cell when it is clicked, typically
* before selection code is invoked for example.
*
* Returns: %TRUE if the signal handled the event and event
* propagation should stop, for example preventing a
* selection from happening, %FALSE to continue as normal
**/
viewable_cell_signals[PRE_CLICKED] =
g_signal_new ("pre-clicked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (PikaCellRendererViewableClass, pre_clicked),
g_signal_accumulator_true_handled, NULL,
pika_marshal_BOOLEAN__STRING_FLAGS,
G_TYPE_BOOLEAN, 2,
G_TYPE_STRING,
GDK_TYPE_MODIFIER_TYPE);
/**
* PikaCellRendererViewable::clicked:
* @cell:
* @path:
* @state:
*
* Called late on a viewable cell when it is clicked, typically
* after selection code has been invoked for example.
**/
viewable_cell_signals[CLICKED] =
g_signal_new ("clicked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (PikaCellRendererViewableClass, clicked),
NULL, NULL,
pika_marshal_VOID__STRING_FLAGS,
G_TYPE_NONE, 2,
G_TYPE_STRING,
GDK_TYPE_MODIFIER_TYPE);
object_class->finalize = pika_cell_renderer_viewable_finalize;
object_class->get_property = pika_cell_renderer_viewable_get_property;
object_class->set_property = pika_cell_renderer_viewable_set_property;
cell_class->get_size = pika_cell_renderer_viewable_get_size;
cell_class->render = pika_cell_renderer_viewable_render;
cell_class->activate = pika_cell_renderer_viewable_activate;
klass->clicked = NULL;
g_object_class_install_property (object_class, PROP_RENDERER,
g_param_spec_object ("renderer",
NULL, NULL,
PIKA_TYPE_VIEW_RENDERER,
PIKA_PARAM_READWRITE));
}
static void
pika_cell_renderer_viewable_init (PikaCellRendererViewable *cellviewable)
{
g_object_set (cellviewable,
"mode", GTK_CELL_RENDERER_MODE_ACTIVATABLE,
NULL);
}
static void
pika_cell_renderer_viewable_finalize (GObject *object)
{
PikaCellRendererViewable *cell = PIKA_CELL_RENDERER_VIEWABLE (object);
g_clear_object (&cell->renderer);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_cell_renderer_viewable_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
PikaCellRendererViewable *cell = PIKA_CELL_RENDERER_VIEWABLE (object);
switch (param_id)
{
case PROP_RENDERER:
g_value_set_object (value, cell->renderer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
pika_cell_renderer_viewable_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
PikaCellRendererViewable *cell = PIKA_CELL_RENDERER_VIEWABLE (object);
switch (param_id)
{
case PROP_RENDERER:
{
PikaViewRenderer *renderer = g_value_dup_object (value);
if (cell->renderer)
g_object_unref (cell->renderer);
cell->renderer = renderer;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
pika_cell_renderer_viewable_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
PikaCellRendererViewable *cellviewable;
gfloat xalign, yalign;
gint xpad, ypad;
gint view_width = 0;
gint view_height = 0;
gint calc_width;
gint calc_height;
gtk_cell_renderer_get_alignment (cell, &xalign, &yalign);
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
cellviewable = PIKA_CELL_RENDERER_VIEWABLE (cell);
if (cellviewable->renderer)
{
view_width = (cellviewable->renderer->width +
2 * cellviewable->renderer->border_width);
view_height = (cellviewable->renderer->height +
2 * cellviewable->renderer->border_width);
}
calc_width = (gint) xpad * 2 + view_width;
calc_height = (gint) ypad * 2 + view_height;
if (x_offset) *x_offset = 0;
if (y_offset) *y_offset = 0;
if (cell_area && view_width > 0 && view_height > 0)
{
if (x_offset)
{
*x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
1.0 - xalign : xalign) *
(cell_area->width - calc_width - 2 * xpad));
*x_offset = (MAX (*x_offset, 0) + xpad);
}
if (y_offset)
{
*y_offset = (yalign * (cell_area->height - calc_height - 2 * ypad));
*y_offset = (MAX (*y_offset, 0) + ypad);
}
}
if (width) *width = calc_width;
if (height) *height = calc_height;
}
static void
pika_cell_renderer_viewable_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
PikaCellRendererViewable *cellviewable;
cellviewable = PIKA_CELL_RENDERER_VIEWABLE (cell);
if (cellviewable->renderer)
{
if (! (flags & GTK_CELL_RENDERER_SELECTED))
{
/* this is an ugly hack. The cell state should be passed to
* the view renderer, so that it can adjust its border.
* (or something like this) */
if (cellviewable->renderer->border_type == PIKA_VIEW_BORDER_WHITE)
pika_view_renderer_set_border_type (cellviewable->renderer,
PIKA_VIEW_BORDER_BLACK);
pika_view_renderer_remove_idle (cellviewable->renderer);
}
cairo_translate (cr, cell_area->x, cell_area->y);
pika_view_renderer_draw (cellviewable->renderer, widget, cr,
cell_area->width,
cell_area->height);
}
}
static gboolean
pika_cell_renderer_viewable_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
PikaCellRendererViewable *cellviewable;
cellviewable = PIKA_CELL_RENDERER_VIEWABLE (cell);
if (cellviewable->renderer)
{
GdkModifierType state = 0;
if (event && ((GdkEventAny *) event)->type == GDK_BUTTON_PRESS)
state = ((GdkEventButton *) event)->state;
if (! event ||
(((GdkEventAny *) event)->type == GDK_BUTTON_PRESS &&
((GdkEventButton *) event)->button == 1))
{
pika_cell_renderer_viewable_clicked (cellviewable, path, state);
return TRUE;
}
}
return FALSE;
}
GtkCellRenderer *
pika_cell_renderer_viewable_new (void)
{
return g_object_new (PIKA_TYPE_CELL_RENDERER_VIEWABLE, NULL);
}
gboolean
pika_cell_renderer_viewable_pre_clicked (PikaCellRendererViewable *cell,
const gchar *path,
GdkModifierType state)
{
gboolean handled = FALSE;
g_return_val_if_fail (PIKA_IS_CELL_RENDERER_VIEWABLE (cell), FALSE);
g_return_val_if_fail (path != NULL, FALSE);
g_signal_emit (cell,
viewable_cell_signals[PRE_CLICKED],
0 /*detail*/,
path, state,
&handled);
return handled;
}
void
pika_cell_renderer_viewable_clicked (PikaCellRendererViewable *cell,
const gchar *path,
GdkModifierType state)
{
g_return_if_fail (PIKA_IS_CELL_RENDERER_VIEWABLE (cell));
g_return_if_fail (path != NULL);
if (cell->renderer)
{
GdkEvent *event = gtk_get_current_event ();
if (event)
{
GdkEventButton *bevent = (GdkEventButton *) event;
GdkModifierType modifiers = gtk_accelerator_get_default_mod_mask ();
if (bevent->type == GDK_BUTTON_PRESS &&
(bevent->state & modifiers) == 0 &&
(bevent->button == 1 || bevent->button == 2))
{
pika_view_popup_show (gtk_get_event_widget (event),
bevent,
cell->renderer->context,
cell->renderer->viewable,
cell->renderer->width,
cell->renderer->height,
cell->renderer->dot_for_dot);
}
gdk_event_free (event);
}
}
/* emit the signal last so no callback effects can set
* cell->renderer to NULL.
*/
g_signal_emit (cell, viewable_cell_signals[CLICKED], 0, path, state);
}