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gimp/app/tools/gimpmagnifytool.c

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/* GIMP - The GNU Image Manipulation Program
* 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 <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpguiconfig.h"
#include "core/gimpimage.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpcanvasrectangle.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-scale.h"
#include "gimpmagnifyoptions.h"
#include "gimpmagnifytool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
static void gimp_magnify_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_magnify_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_magnify_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_magnify_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_magnify_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_magnify_tool_draw (GimpDrawTool *draw_tool);
static void gimp_magnify_tool_update_items (GimpMagnifyTool *magnify);
G_DEFINE_TYPE (GimpMagnifyTool, gimp_magnify_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_magnify_tool_parent_class
void
gimp_magnify_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_MAGNIFY_TOOL,
GIMP_TYPE_MAGNIFY_OPTIONS,
gimp_magnify_options_gui,
0,
"gimp-zoom-tool",
_("Zoom"),
_("Zoom Tool: Adjust the zoom level"),
N_("_Zoom"), "Z",
NULL, GIMP_HELP_TOOL_ZOOM,
GIMP_ICON_TOOL_ZOOM,
data);
}
static void
gimp_magnify_tool_class_init (GimpMagnifyToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
tool_class->button_press = gimp_magnify_tool_button_press;
tool_class->button_release = gimp_magnify_tool_button_release;
tool_class->motion = gimp_magnify_tool_motion;
tool_class->modifier_key = gimp_magnify_tool_modifier_key;
tool_class->cursor_update = gimp_magnify_tool_cursor_update;
draw_tool_class->draw = gimp_magnify_tool_draw;
}
static void
gimp_magnify_tool_init (GimpMagnifyTool *magnify_tool)
{
GimpTool *tool = GIMP_TOOL (magnify_tool);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_tool_control_set_handle_empty_image (tool->control, TRUE);
gimp_tool_control_set_wants_click (tool->control, TRUE);
gimp_tool_control_set_snap_to (tool->control, FALSE);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_ZOOM);
gimp_tool_control_set_cursor_modifier (tool->control,
GIMP_CURSOR_MODIFIER_PLUS);
gimp_tool_control_set_toggle_cursor_modifier (tool->control,
GIMP_CURSOR_MODIFIER_MINUS);
magnify_tool->x = 0;
magnify_tool->y = 0;
magnify_tool->w = 0;
magnify_tool->h = 0;
}
static void
gimp_magnify_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpMagnifyTool *magnify = GIMP_MAGNIFY_TOOL (tool);
magnify->x = coords->x;
magnify->y = coords->y;
magnify->w = 0;
magnify->h = 0;
gimp_tool_control_activate (tool->control);
tool->display = display;
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
}
static void
gimp_magnify_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpMagnifyTool *magnify = GIMP_MAGNIFY_TOOL (tool);
GimpMagnifyOptions *options = GIMP_MAGNIFY_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
gimp_tool_control_halt (tool->control);
switch (release_type)
{
case GIMP_BUTTON_RELEASE_CLICK:
case GIMP_BUTTON_RELEASE_NO_MOTION:
gimp_display_shell_scale (shell,
options->zoom_type,
0.0,
GIMP_ZOOM_FOCUS_POINTER);
break;
case GIMP_BUTTON_RELEASE_NORMAL:
{
gdouble x, y;
gdouble width, height;
gboolean resize_window;
x = (magnify->w < 0) ? magnify->x + magnify->w : magnify->x;
y = (magnify->h < 0) ? magnify->y + magnify->h : magnify->y;
width = (magnify->w < 0) ? -magnify->w : magnify->w;
height = (magnify->h < 0) ? -magnify->h : magnify->h;
/* Resize windows only in multi-window mode */
resize_window = (options->auto_resize &&
! GIMP_GUI_CONFIG (display->config)->single_window_mode);
gimp_display_shell_scale_to_rectangle (shell,
options->zoom_type,
x, y, width, height,
resize_window);
}
break;
default:
break;
}
}
static void
gimp_magnify_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpMagnifyTool *magnify = GIMP_MAGNIFY_TOOL (tool);
magnify->w = coords->x - magnify->x;
magnify->h = coords->y - magnify->y;
gimp_magnify_tool_update_items (magnify);
}
static void
gimp_magnify_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpMagnifyOptions *options = GIMP_MAGNIFY_TOOL_GET_OPTIONS (tool);
if (key == gimp_get_toggle_behavior_mask ())
{
switch (options->zoom_type)
{
case GIMP_ZOOM_IN:
g_object_set (options, "zoom-type", GIMP_ZOOM_OUT, NULL);
break;
case GIMP_ZOOM_OUT:
g_object_set (options, "zoom-type", GIMP_ZOOM_IN, NULL);
break;
default:
break;
}
}
}
static void
gimp_magnify_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpMagnifyOptions *options = GIMP_MAGNIFY_TOOL_GET_OPTIONS (tool);
gimp_tool_control_set_toggled (tool->control,
options->zoom_type == GIMP_ZOOM_OUT);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
gimp_magnify_tool_draw (GimpDrawTool *draw_tool)
{
GimpMagnifyTool *magnify = GIMP_MAGNIFY_TOOL (draw_tool);
magnify->rectangle =
gimp_draw_tool_add_rectangle (draw_tool, FALSE,
magnify->x,
magnify->y,
magnify->w,
magnify->h);
}
static void
gimp_magnify_tool_update_items (GimpMagnifyTool *magnify)
{
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (magnify)))
{
gimp_canvas_rectangle_set (magnify->rectangle,
magnify->x,
magnify->y,
magnify->w,
magnify->h);
}
}
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