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-rw-r--r--app/tools/gimpmagnifytool.c293
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diff --git a/app/tools/gimpmagnifytool.c b/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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