298 lines
11 KiB
C
298 lines
11 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikamath/pikamath.h"
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#include "libpikawidgets/pikawidgets.h"
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#include "tools-types.h"
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#include "config/pikaguiconfig.h"
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#include "core/pikaimage.h"
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#include "widgets/pikahelp-ids.h"
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#include "widgets/pikawidgets-utils.h"
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#include "display/pikacanvasrectangle.h"
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#include "display/pikadisplay.h"
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#include "display/pikadisplayshell.h"
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#include "display/pikadisplayshell-scale.h"
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#include "pikamagnifyoptions.h"
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#include "pikamagnifytool.h"
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#include "pikatoolcontrol.h"
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#include "pika-intl.h"
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static void pika_magnify_tool_button_press (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonPressType press_type,
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PikaDisplay *display);
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static void pika_magnify_tool_button_release (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonReleaseType release_type,
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PikaDisplay *display);
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static void pika_magnify_tool_motion (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaDisplay *display);
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static void pika_magnify_tool_modifier_key (PikaTool *tool,
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GdkModifierType key,
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gboolean press,
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GdkModifierType state,
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PikaDisplay *display);
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static void pika_magnify_tool_cursor_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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PikaDisplay *display);
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static void pika_magnify_tool_draw (PikaDrawTool *draw_tool);
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static void pika_magnify_tool_update_items (PikaMagnifyTool *magnify);
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G_DEFINE_TYPE (PikaMagnifyTool, pika_magnify_tool, PIKA_TYPE_DRAW_TOOL)
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#define parent_class pika_magnify_tool_parent_class
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void
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pika_magnify_tool_register (PikaToolRegisterCallback callback,
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gpointer data)
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{
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(* callback) (PIKA_TYPE_MAGNIFY_TOOL,
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PIKA_TYPE_MAGNIFY_OPTIONS,
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pika_magnify_options_gui,
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0,
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"pika-zoom-tool",
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_("Zoom"),
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_("Zoom Tool: Adjust the zoom level"),
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N_("_Zoom"), "Z",
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NULL, PIKA_HELP_TOOL_ZOOM,
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PIKA_ICON_TOOL_ZOOM,
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data);
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}
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static void
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pika_magnify_tool_class_init (PikaMagnifyToolClass *klass)
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{
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PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
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PikaDrawToolClass *draw_tool_class = PIKA_DRAW_TOOL_CLASS (klass);
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tool_class->button_press = pika_magnify_tool_button_press;
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tool_class->button_release = pika_magnify_tool_button_release;
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tool_class->motion = pika_magnify_tool_motion;
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tool_class->modifier_key = pika_magnify_tool_modifier_key;
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tool_class->cursor_update = pika_magnify_tool_cursor_update;
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draw_tool_class->draw = pika_magnify_tool_draw;
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}
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static void
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pika_magnify_tool_init (PikaMagnifyTool *magnify_tool)
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{
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PikaTool *tool = PIKA_TOOL (magnify_tool);
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pika_tool_control_set_scroll_lock (tool->control, TRUE);
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pika_tool_control_set_handle_empty_image (tool->control, TRUE);
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pika_tool_control_set_wants_click (tool->control, TRUE);
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pika_tool_control_set_snap_to (tool->control, FALSE);
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pika_tool_control_set_tool_cursor (tool->control,
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PIKA_TOOL_CURSOR_ZOOM);
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pika_tool_control_set_cursor_modifier (tool->control,
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PIKA_CURSOR_MODIFIER_PLUS);
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pika_tool_control_set_toggle_cursor_modifier (tool->control,
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PIKA_CURSOR_MODIFIER_MINUS);
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magnify_tool->x = 0;
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magnify_tool->y = 0;
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magnify_tool->w = 0;
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magnify_tool->h = 0;
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}
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static void
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pika_magnify_tool_button_press (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonPressType press_type,
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PikaDisplay *display)
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{
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PikaMagnifyTool *magnify = PIKA_MAGNIFY_TOOL (tool);
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magnify->x = coords->x;
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magnify->y = coords->y;
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magnify->w = 0;
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magnify->h = 0;
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pika_tool_control_activate (tool->control);
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tool->display = display;
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pika_draw_tool_start (PIKA_DRAW_TOOL (tool), display);
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}
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static void
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pika_magnify_tool_button_release (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaButtonReleaseType release_type,
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PikaDisplay *display)
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{
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PikaMagnifyTool *magnify = PIKA_MAGNIFY_TOOL (tool);
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PikaMagnifyOptions *options = PIKA_MAGNIFY_TOOL_GET_OPTIONS (tool);
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PikaDisplayShell *shell = pika_display_get_shell (tool->display);
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pika_draw_tool_stop (PIKA_DRAW_TOOL (tool));
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pika_tool_control_halt (tool->control);
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switch (release_type)
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{
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case PIKA_BUTTON_RELEASE_CLICK:
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case PIKA_BUTTON_RELEASE_NO_MOTION:
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pika_display_shell_scale (shell,
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options->zoom_type,
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0.0,
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PIKA_ZOOM_FOCUS_POINTER);
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break;
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case PIKA_BUTTON_RELEASE_NORMAL:
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{
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gdouble x, y;
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gdouble width, height;
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gboolean resize_window;
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x = (magnify->w < 0) ? magnify->x + magnify->w : magnify->x;
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y = (magnify->h < 0) ? magnify->y + magnify->h : magnify->y;
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width = (magnify->w < 0) ? -magnify->w : magnify->w;
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height = (magnify->h < 0) ? -magnify->h : magnify->h;
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/* Resize windows only in multi-window mode */
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resize_window = (options->auto_resize &&
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! PIKA_GUI_CONFIG (display->config)->single_window_mode);
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pika_display_shell_scale_to_rectangle (shell,
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options->zoom_type,
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x, y, width, height,
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resize_window);
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}
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break;
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default:
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break;
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}
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}
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static void
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pika_magnify_tool_motion (PikaTool *tool,
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const PikaCoords *coords,
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guint32 time,
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GdkModifierType state,
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PikaDisplay *display)
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{
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PikaMagnifyTool *magnify = PIKA_MAGNIFY_TOOL (tool);
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magnify->w = coords->x - magnify->x;
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magnify->h = coords->y - magnify->y;
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pika_magnify_tool_update_items (magnify);
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}
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static void
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pika_magnify_tool_modifier_key (PikaTool *tool,
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GdkModifierType key,
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gboolean press,
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GdkModifierType state,
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PikaDisplay *display)
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{
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PikaMagnifyOptions *options = PIKA_MAGNIFY_TOOL_GET_OPTIONS (tool);
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if (key == pika_get_toggle_behavior_mask ())
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{
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switch (options->zoom_type)
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{
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case PIKA_ZOOM_IN:
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g_object_set (options, "zoom-type", PIKA_ZOOM_OUT, NULL);
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break;
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case PIKA_ZOOM_OUT:
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g_object_set (options, "zoom-type", PIKA_ZOOM_IN, NULL);
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break;
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default:
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break;
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}
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}
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}
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static void
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pika_magnify_tool_cursor_update (PikaTool *tool,
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const PikaCoords *coords,
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GdkModifierType state,
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PikaDisplay *display)
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{
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PikaMagnifyOptions *options = PIKA_MAGNIFY_TOOL_GET_OPTIONS (tool);
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pika_tool_control_set_toggled (tool->control,
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options->zoom_type == PIKA_ZOOM_OUT);
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PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
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}
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static void
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pika_magnify_tool_draw (PikaDrawTool *draw_tool)
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{
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PikaMagnifyTool *magnify = PIKA_MAGNIFY_TOOL (draw_tool);
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magnify->rectangle =
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pika_draw_tool_add_rectangle (draw_tool, FALSE,
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magnify->x,
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magnify->y,
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magnify->w,
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magnify->h);
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}
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static void
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pika_magnify_tool_update_items (PikaMagnifyTool *magnify)
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{
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if (pika_draw_tool_is_active (PIKA_DRAW_TOOL (magnify)))
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{
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pika_canvas_rectangle_set (magnify->rectangle,
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magnify->x,
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magnify->y,
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magnify->w,
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magnify->h);
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}
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}
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