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gimp/app/display/gimpdisplayshell-tool-events.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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "display-types.h"
#include "tools/tools-types.h"
#include "config/gimpdisplayconfig.h"
#include "core/gimp.h"
#include "core/gimpimage.h"
#include "widgets/gimpcontrollers.h"
#include "widgets/gimpcontrollerkeyboard.h"
#include "widgets/gimpcontrollermouse.h"
#include "widgets/gimpcontrollerwheel.h"
#include "widgets/gimpdeviceinfo.h"
#include "widgets/gimpdeviceinfo-coords.h"
#include "widgets/gimpdevicemanager.h"
#include "widgets/gimpdevices.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimpuimanager.h"
#include "widgets/gimpwidgets-utils.h"
#include "tools/gimpimagemaptool.h"
#include "tools/gimpmovetool.h"
#include "tools/gimppainttool.h"
#include "tools/gimptoolcontrol.h"
#include "tools/tool_manager.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-autoscroll.h"
#include "gimpdisplayshell-cursor.h"
#include "gimpdisplayshell-grab.h"
#include "gimpdisplayshell-layer-select.h"
#include "gimpdisplayshell-rotate.h"
#include "gimpdisplayshell-scale.h"
#include "gimpdisplayshell-scroll.h"
#include "gimpdisplayshell-tool-events.h"
#include "gimpdisplayshell-transform.h"
#include "gimpimagewindow.h"
#include "gimpmotionbuffer.h"
#include "gimp-log.h"
/* local function prototypes */
static GdkModifierType
gimp_display_shell_key_to_state (gint key);
static GdkModifierType
gimp_display_shell_button_to_state (gint button);
static void gimp_display_shell_proximity_in (GimpDisplayShell *shell);
static void gimp_display_shell_proximity_out (GimpDisplayShell *shell);
static void gimp_display_shell_check_device_cursor (GimpDisplayShell *shell);
static void gimp_display_shell_start_scrolling (GimpDisplayShell *shell,
const GdkEvent *event,
GdkModifierType state,
gint x,
gint y);
static void gimp_display_shell_stop_scrolling (GimpDisplayShell *shell,
const GdkEvent *event);
static void gimp_display_shell_space_pressed (GimpDisplayShell *shell,
const GdkEvent *event);
static void gimp_display_shell_space_released (GimpDisplayShell *shell,
const GdkEvent *event,
const GimpCoords *image_coords);
static gboolean gimp_display_shell_tab_pressed (GimpDisplayShell *shell,
const GdkEventKey *event);
static void gimp_display_shell_update_focus (GimpDisplayShell *shell,
gboolean focus_in,
const GimpCoords *image_coords,
GdkModifierType state);
static void gimp_display_shell_update_cursor (GimpDisplayShell *shell,
const GimpCoords *display_coords,
const GimpCoords *image_coords,
GdkModifierType state,
gboolean update_software_cursor);
static gboolean gimp_display_shell_initialize_tool (GimpDisplayShell *shell,
const GimpCoords *image_coords,
GdkModifierType state);
static void gimp_display_shell_get_event_coords (GimpDisplayShell *shell,
const GdkEvent *event,
GimpCoords *display_coords,
GdkModifierType *state,
guint32 *time);
static void gimp_display_shell_untransform_event_coords (GimpDisplayShell *shell,
const GimpCoords *display_coords,
GimpCoords *image_coords,
gboolean *update_software_cursor);
static GdkEvent * gimp_display_shell_compress_motion (GimpDisplayShell *shell);
/* public functions */
gboolean
gimp_display_shell_events (GtkWidget *widget,
GdkEvent *event,
GimpDisplayShell *shell)
{
Gimp *gimp;
gboolean set_display = FALSE;
/* are we in destruction? */
if (! shell->display || ! gimp_display_get_shell (shell->display))
return TRUE;
gimp = gimp_display_get_gimp (shell->display);
switch (event->type)
{
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
{
GdkEventKey *kevent = (GdkEventKey *) event;
if (gimp->busy)
return TRUE;
/* do not process any 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)
{
break;
}
if (event->type == GDK_KEY_PRESS)
{
if ((kevent->keyval == GDK_KEY_space ||
kevent->keyval == GDK_KEY_KP_Space) && shell->space_release_pending)
{
shell->space_pressed = TRUE;
shell->space_release_pending = FALSE;
}
}
else
{
if ((kevent->keyval == GDK_KEY_space ||
kevent->keyval == GDK_KEY_KP_Space) && shell->space_pressed)
{
shell->space_pressed = FALSE;
shell->space_release_pending = TRUE;
}
}
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_pressed || shell->scrolling)
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)
gimp_context_set_display (gimp_get_user_context (gimp), shell->display);
return FALSE;
}
static gboolean
gimp_display_shell_canvas_no_image_events (GtkWidget *canvas,
GdkEvent *event,
GimpDisplayShell *shell)
{
switch (event->type)
{
case GDK_2BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
GimpImageWindow *window = gimp_display_shell_get_window (shell);
GimpUIManager *manager = gimp_image_window_get_ui_manager (window);
gimp_ui_manager_activate_action (manager, "file", "file-open");
}
return TRUE;
}
break;
case GDK_BUTTON_PRESS:
if (gdk_event_triggers_context_menu (event))
{
gimp_ui_manager_ui_popup (shell->popup_manager,
"/dummy-menubar/image-popup",
GTK_WIDGET (shell),
NULL, NULL, 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 gimp_display_shell_tab_pressed (shell, kevent);
}
}
break;
default:
break;
}
return FALSE;
}
gboolean
gimp_display_shell_canvas_tool_events (GtkWidget *canvas,
GdkEvent *event,
GimpDisplayShell *shell)
{
GimpDisplay *display;
GimpImage *image;
Gimp *gimp;
GimpCoords display_coords;
GimpCoords 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 || ! gimp_display_get_shell (shell->display))
return TRUE;
/* set the active display before doing any other canvas event processing */
if (gimp_display_shell_events (canvas, event, shell))
return TRUE;
/* ignore events on overlays, which are the canvas' children
*/
if (gtk_widget_is_ancestor (gtk_get_event_widget (event), shell->canvas))
{
return FALSE;
}
display = shell->display;
gimp = gimp_display_get_gimp (display);
image = gimp_display_get_image (display);
if (! image)
return gimp_display_shell_canvas_no_image_events (canvas, event, shell);
GIMP_LOG (TOOL_EVENTS, "event (display %p): %s",
display, gimp_print_event (event));
/* Find out what device the event occurred upon */
if (! gimp->busy &&
! shell->inferior_ignore_mode &&
gimp_devices_check_change (gimp, event))
{
gimp_display_shell_check_device_cursor (shell);
device_changed = TRUE;
}
gimp_display_shell_get_event_coords (shell, event,
&display_coords,
&state, &time);
gimp_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))
{
gimp_display_shell_update_focus (shell, TRUE,
&image_coords, state);
}
switch (event->type)
{
case GDK_ENTER_NOTIFY:
{
GdkEventCrossing *cevent = (GdkEventCrossing *) event;
if (shell->inferior_ignore_mode)
{
shell->inferior_ignore_mode = FALSE;
gtk_widget_set_extension_events (shell->canvas,
GDK_EXTENSION_EVENTS_ALL);
}
if (cevent->mode != GDK_CROSSING_NORMAL)
return TRUE;
/* ignore enter notify while we have a grab */
if (shell->pointer_grabbed)
return TRUE;
gimp_display_shell_proximity_in (shell);
update_sw_cursor = TRUE;
tool_manager_oper_update_active (gimp,
&image_coords, state,
shell->proximity,
display);
}
break;
case GDK_LEAVE_NOTIFY:
{
GdkEventCrossing *cevent = (GdkEventCrossing *) event;
if (cevent->detail == GDK_NOTIFY_INFERIOR)
{
shell->inferior_ignore_mode = TRUE;
gtk_widget_set_extension_events (shell->canvas,
GDK_EXTENSION_EVENTS_NONE);
}
if (cevent->mode != GDK_CROSSING_NORMAL)
return TRUE;
/* ignore leave notify while we have a grab */
if (shell->pointer_grabbed)
return TRUE;
gimp_display_shell_proximity_out (shell);
tool_manager_oper_update_active (gimp,
&image_coords, state,
shell->proximity,
display);
}
break;
case GDK_PROXIMITY_IN:
gimp_display_shell_proximity_in (shell);
tool_manager_oper_update_active (gimp,
&image_coords, state,
shell->proximity,
display);
break;
case GDK_PROXIMITY_OUT:
gimp_display_shell_proximity_out (shell);
tool_manager_oper_update_active (gimp,
&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->pointer_grabbed)
return TRUE;
/* press modifier keys when the canvas gets the focus */
gimp_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->pointer_grabbed)
return TRUE;
/* release modifier keys when the canvas loses the focus */
gimp_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 (gimp->busy || shell->scrolling || shell->pointer_grabbed)
return TRUE;
button_state = gimp_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.
*/
gimp_display_shell_update_focus (shell, TRUE,
&image_coords, state);
gimp_display_shell_update_cursor (shell, &display_coords,
&image_coords, state & ~button_state,
FALSE);
if (gdk_event_triggers_context_menu (event))
{
GimpUIManager *ui_manager;
const gchar *ui_path;
ui_manager = tool_manager_get_popup_active (gimp,
&image_coords, state,
display,
&ui_path);
if (ui_manager)
{
gimp_ui_manager_ui_popup (ui_manager,
ui_path,
GTK_WIDGET (shell),
NULL, NULL, NULL, NULL);
}
else
{
gimp_ui_manager_ui_popup (shell->popup_manager,
"/dummy-menubar/image-popup",
GTK_WIDGET (shell),
NULL, NULL, NULL, NULL);
}
}
else if (bevent->button == 1)
{
if (! gimp_display_shell_pointer_grab (shell, NULL, 0))
return TRUE;
if (! shell->space_pressed && ! shell->space_release_pending)
if (! gimp_display_shell_keyboard_grab (shell, event))
{
gimp_display_shell_pointer_ungrab (shell, NULL);
return TRUE;
}
if (gimp_display_shell_initialize_tool (shell,
&image_coords, state))
{
GimpCoords last_motion;
/* Use the last evaluated dynamic axes 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 dynamics.
*/
gimp_motion_buffer_begin_stroke (shell->motion_buffer, time,
&last_motion);
last_motion.x = image_coords.x;
last_motion.y = image_coords.y;
last_motion.pressure = image_coords.pressure;
last_motion.xtilt = image_coords.xtilt;
last_motion.ytilt = image_coords.ytilt;
last_motion.wheel = image_coords.wheel;
last_motion.xscale = image_coords.xscale;
last_motion.yscale = image_coords.yscale;
image_coords = last_motion;
tool_manager_button_press_active (gimp,
&image_coords,
time, state,
GIMP_BUTTON_PRESS_NORMAL,
display);
}
}
else if (bevent->button == 2)
{
gimp_display_shell_start_scrolling (shell, NULL, state,
bevent->x, bevent->y);
}
return_val = TRUE;
}
break;
case GDK_2BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
GimpTool *active_tool;
if (gimp->busy)
return TRUE;
active_tool = tool_manager_get_active (gimp);
if (bevent->button == 1 &&
active_tool &&
gimp_tool_control_is_active (active_tool->control) &&
gimp_tool_control_get_wants_double_click (active_tool->control))
{
tool_manager_button_press_active (gimp,
&image_coords,
time, state,
GIMP_BUTTON_PRESS_DOUBLE,
display);
}
/* don't update the cursor again on double click */
return TRUE;
}
break;
case GDK_3BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
GimpTool *active_tool;
if (gimp->busy)
return TRUE;
active_tool = tool_manager_get_active (gimp);
if (bevent->button == 1 &&
active_tool &&
gimp_tool_control_is_active (active_tool->control) &&
gimp_tool_control_get_wants_triple_click (active_tool->control))
{
tool_manager_button_press_active (gimp,
&image_coords,
time, state,
GIMP_BUTTON_PRESS_TRIPLE,
display);
}
/* don't update the cursor again on triple click */
return TRUE;
}
break;
case GDK_BUTTON_RELEASE:
{
GdkEventButton *bevent = (GdkEventButton *) event;
GimpTool *active_tool;
gimp_display_shell_autoscroll_stop (shell);
if (gimp->busy)
return TRUE;
active_tool = tool_manager_get_active (gimp);
state &= ~gimp_display_shell_key_to_state (bevent->button);
if (bevent->button == 1)
{
if (! shell->pointer_grabbed || shell->scrolling)
return TRUE;
if (! shell->space_pressed && ! shell->space_release_pending)
gimp_display_shell_keyboard_ungrab (shell, event);
if (active_tool &&
(! gimp_image_is_empty (image) ||
gimp_tool_control_get_handle_empty_image (active_tool->control)))
{
gimp_motion_buffer_end_stroke (shell->motion_buffer);
if (gimp_tool_control_is_active (active_tool->control))
{
tool_manager_button_release_active (gimp,
&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))
gimp_display_shell_update_focus (shell, TRUE,
&image_coords, state);
else
gimp_display_shell_update_focus (shell, FALSE,
&image_coords, 0);
gimp_display_shell_pointer_ungrab (shell, NULL);
if (shell->space_release_pending)
gimp_display_shell_space_released (shell, event, &image_coords);
}
else if (bevent->button == 2)
{
if (shell->scrolling)
gimp_display_shell_stop_scrolling (shell, NULL);
}
else if (bevent->button == 3)
{
/* nop */
}
else
{
GdkEventButton *bevent = (GdkEventButton *) event;
GimpController *mouse = gimp_controllers_get_mouse (gimp);
if (!(shell->scrolling || shell->pointer_grabbed) &&
mouse && gimp_controller_mouse_button (GIMP_CONTROLLER_MOUSE (mouse),
bevent))
{
return TRUE;
}
}
return_val = TRUE;
}
break;
case GDK_SCROLL:
{
GdkEventScroll *sevent = (GdkEventScroll *) event;
GimpController *wheel = gimp_controllers_get_wheel (gimp);
if (! wheel ||
! gimp_controller_wheel_scroll (GIMP_CONTROLLER_WHEEL (wheel),
sevent))
{
GdkScrollDirection direction = sevent->direction;
if (state & gimp_get_toggle_behavior_mask ())
{
switch (direction)
{
case GDK_SCROLL_UP:
gimp_display_shell_scale (shell,
GIMP_ZOOM_IN,
0.0,
GIMP_ZOOM_FOCUS_BEST_GUESS);
break;
case GDK_SCROLL_DOWN:
gimp_display_shell_scale (shell,
GIMP_ZOOM_OUT,
0.0,
GIMP_ZOOM_FOCUS_BEST_GUESS);
break;
default:
break;
}
}
else
{
GtkAdjustment *adj = NULL;
gdouble value;
if (state & GDK_SHIFT_MASK)
switch (direction)
{
case GDK_SCROLL_UP: direction = GDK_SCROLL_LEFT; break;
case GDK_SCROLL_DOWN: direction = GDK_SCROLL_RIGHT; break;
case GDK_SCROLL_LEFT: direction = GDK_SCROLL_UP; break;
case GDK_SCROLL_RIGHT: direction = GDK_SCROLL_DOWN; break;
}
switch (direction)
{
case GDK_SCROLL_LEFT:
case GDK_SCROLL_RIGHT:
adj = shell->hsbdata;
break;
case GDK_SCROLL_UP:
case GDK_SCROLL_DOWN:
adj = shell->vsbdata;
break;
}
value = (gtk_adjustment_get_value (adj) +
((direction == GDK_SCROLL_UP ||
direction == GDK_SCROLL_LEFT) ?
-gtk_adjustment_get_page_increment (adj) / 2 :
gtk_adjustment_get_page_increment (adj) / 2));
value = CLAMP (value,
gtk_adjustment_get_lower (adj),
gtk_adjustment_get_upper (adj) -
gtk_adjustment_get_page_size (adj));
gtk_adjustment_set_value (adj, value);
}
}
gimp_display_shell_untransform_event_coords (shell,
&display_coords,
&image_coords,
&update_sw_cursor);
tool_manager_oper_update_active (gimp,
&image_coords, state,
shell->proximity,
display);
return_val = TRUE;
}
break;
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
GdkEvent *compressed_motion = NULL;
GimpMotionMode motion_mode = GIMP_MOTION_MODE_EXACT;
GimpTool *active_tool;
if (gimp->busy)
return TRUE;
active_tool = tool_manager_get_active (gimp);
if (active_tool)
motion_mode = gimp_tool_control_get_motion_mode (active_tool->control);
if (shell->scrolling ||
motion_mode == GIMP_MOTION_MODE_COMPRESS)
{
compressed_motion = gimp_display_shell_compress_motion (shell);
if (compressed_motion && ! shell->scrolling)
{
gimp_display_shell_get_event_coords (shell,
compressed_motion,
&display_coords,
&state, &time);
gimp_display_shell_untransform_event_coords (shell,
&display_coords,
&image_coords,
NULL);
}
}
/* 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
*/
gimp_display_shell_proximity_in (shell);
update_sw_cursor = TRUE;
if (shell->scrolling)
{
const gint x = (compressed_motion
? ((GdkEventMotion *) compressed_motion)->x
: mevent->x);
const gint y = (compressed_motion
? ((GdkEventMotion *) compressed_motion)->y
: mevent->y);
if (shell->rotating)
{
gboolean constrain = (state & GDK_CONTROL_MASK) ? TRUE : FALSE;
gimp_display_shell_rotate_drag (shell,
shell->scroll_last_x,
shell->scroll_last_y,
x,
y,
constrain);
}
else
{
gimp_display_shell_scroll (shell,
shell->scroll_last_x - x,
shell->scroll_last_y - y);
}
shell->scroll_last_x = x;
shell->scroll_last_y = y;
}
else if (state & GDK_BUTTON1_MASK)
{
if (active_tool &&
gimp_tool_control_is_active (active_tool->control) &&
(! gimp_image_is_empty (image) ||
gimp_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) &&
! gimp_tool_control_get_scroll_lock (active_tool->control))
{
gimp_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 =
gimp_motion_buffer_get_last_motion_time (shell->motion_buffer);
if (motion_mode == GIMP_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))
{
GimpDeviceInfo *device;
gint i;
device = gimp_device_info_get_by_device (mevent->device);
for (i = 0; i < n_history_events; i++)
{
gimp_device_info_get_time_coords (device,
history_events[i],
&display_coords);
gimp_display_shell_untransform_event_coords (shell,
&display_coords,
&image_coords,
NULL);
/* Early removal of useless events saves CPU time.
*/
if (gimp_motion_buffer_motion_event (shell->motion_buffer,
&image_coords,
history_events[i]->time,
TRUE))
{
gimp_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 == GIMP_MOTION_MODE_EXACT);
/* Early removal of useless events saves CPU time.
*/
if (gimp_motion_buffer_motion_event (shell->motion_buffer,
&image_coords,
time,
event_fill))
{
gimp_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 (gimp_motion_buffer_motion_event (shell->motion_buffer,
&image_coords,
time,
FALSE))
{
gimp_motion_buffer_request_hover (shell->motion_buffer,
state,
shell->proximity);
}
}
if (compressed_motion)
gdk_event_free (compressed_motion);
return_val = TRUE;
}
break;
case GDK_KEY_PRESS:
{
GdkEventKey *kevent = (GdkEventKey *) event;
GimpTool *active_tool;
active_tool = tool_manager_get_active (gimp);
if (state & GDK_BUTTON1_MASK)
{
switch (kevent->keyval)
{
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 = gimp_display_shell_key_to_state (kevent->keyval);
state |= key;
if (active_tool &&
gimp_tool_control_is_active (active_tool->control) &&
! gimp_image_is_empty (image))
{
tool_manager_active_modifier_state_active (gimp, state,
display);
}
}
break;
}
}
else
{
gboolean arrow_key = FALSE;
tool_manager_focus_display_active (gimp, display);
if (gimp_tool_control_get_wants_all_key_events (active_tool->control))
{
if (tool_manager_key_press_active (gimp, 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_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 (! gimp_image_is_empty (image))
return_val = tool_manager_key_press_active (gimp,
kevent,
display);
if (! return_val)
{
GimpController *keyboard = gimp_controllers_get_keyboard (gimp);
if (keyboard)
return_val =
gimp_controller_keyboard_key_press (GIMP_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:
gimp_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:
gimp_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 = gimp_display_shell_key_to_state (kevent->keyval);
state |= key;
if (! gimp_image_is_empty (image))
tool_manager_modifier_state_active (gimp, state, display);
}
break;
}
tool_manager_oper_update_active (gimp,
&image_coords, state,
shell->proximity,
display);
}
}
break;
case GDK_KEY_RELEASE:
{
GdkEventKey *kevent = (GdkEventKey *) event;
GimpTool *active_tool;
active_tool = tool_manager_get_active (gimp);
if (state & GDK_BUTTON1_MASK)
{
switch (kevent->keyval)
{
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 = gimp_display_shell_key_to_state (kevent->keyval);
state &= ~key;
if (active_tool &&
gimp_tool_control_is_active (active_tool->control) &&
! gimp_image_is_empty (image))
{
tool_manager_active_modifier_state_active (gimp, state,
display);
}
}
break;
}
}
else
{
tool_manager_focus_display_active (gimp, display);
if (gimp_tool_control_get_wants_all_key_events (active_tool->control))
{
if (tool_manager_key_release_active (gimp, 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:
gimp_display_shell_space_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 = gimp_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 (! gimp_image_is_empty (image))
tool_manager_modifier_state_active (gimp, state, display);
}
break;
}
tool_manager_oper_update_active (gimp,
&image_coords, state,
shell->proximity,
display);
}
}
break;
default:
break;
}
/* if we reached this point in gimp_busy mode, return now */
if (gimp->busy)
return return_val;
/* cursor update */
gimp_display_shell_update_cursor (shell, &display_coords, &image_coords,
state, update_sw_cursor);
return return_val;
}
void
gimp_display_shell_buffer_stroke (GimpMotionBuffer *buffer,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplayShell *shell)
{
GimpDisplay *display = shell->display;
Gimp *gimp = gimp_display_get_gimp (display);
GimpTool *active_tool;
active_tool = tool_manager_get_active (gimp);
if (active_tool &&
gimp_tool_control_is_active (active_tool->control))
{
tool_manager_motion_active (gimp,
coords, time, state,
display);
}
}
void
gimp_display_shell_buffer_hover (GimpMotionBuffer *buffer,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplayShell *shell)
{
GimpDisplay *display = shell->display;
Gimp *gimp = gimp_display_get_gimp (display);
GimpTool *active_tool;
active_tool = tool_manager_get_active (gimp);
if (active_tool &&
! gimp_tool_control_is_active (active_tool->control))
{
tool_manager_oper_update_active (gimp,
coords, state, proximity,
display);
}
}
static gboolean
gimp_display_shell_ruler_button_press (GtkWidget *widget,
GdkEventButton *event,
GimpDisplayShell *shell,
gboolean horizontal)
{
GimpDisplay *display = shell->display;
if (display->gimp->busy)
return TRUE;
if (! gimp_display_get_image (display))
return TRUE;
if (event->type == GDK_BUTTON_PRESS && event->button == 1)
{
GimpTool *active_tool;
gboolean sample_point;
active_tool = tool_manager_get_active (display->gimp);
sample_point = (event->state & gimp_get_toggle_behavior_mask ());
if (! ((sample_point && (GIMP_IS_COLOR_TOOL (active_tool) &&
! GIMP_IS_IMAGE_MAP_TOOL (active_tool) &&
! (GIMP_IS_PAINT_TOOL (active_tool) &&
! GIMP_PAINT_TOOL (active_tool)->pick_colors)))
||
(! sample_point && GIMP_IS_MOVE_TOOL (active_tool))))
{
GimpToolInfo *tool_info;
tool_info = gimp_get_tool_info (display->gimp,
sample_point ?
"gimp-color-picker-tool" :
"gimp-move-tool");
if (tool_info)
gimp_context_set_tool (gimp_get_user_context (display->gimp),
tool_info);
}
active_tool = tool_manager_get_active (display->gimp);
if (active_tool)
{
gimp_display_shell_update_focus (shell, TRUE,
NULL, event->state);
if (gimp_display_shell_pointer_grab (shell, NULL, 0))
{
if (gimp_display_shell_keyboard_grab (shell,
(GdkEvent *) event))
{
if (sample_point)
gimp_color_tool_start_sample_point (active_tool, display);
else if (horizontal)
gimp_move_tool_start_hguide (active_tool, display);
else
gimp_move_tool_start_vguide (active_tool, display);
return TRUE;
}
else
{
gimp_display_shell_pointer_ungrab (shell, NULL);
}
}
}
}
return FALSE;
}
gboolean
gimp_display_shell_hruler_button_press (GtkWidget *widget,
GdkEventButton *event,
GimpDisplayShell *shell)
{
return gimp_display_shell_ruler_button_press (widget, event, shell, TRUE);
}
gboolean
gimp_display_shell_vruler_button_press (GtkWidget *widget,
GdkEventButton *event,
GimpDisplayShell *shell)
{
return gimp_display_shell_ruler_button_press (widget, event, shell, FALSE);
}
/* private functions */
static GdkModifierType
gimp_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
gimp_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
gimp_display_shell_proximity_in (GimpDisplayShell *shell)
{
if (! shell->proximity)
{
shell->proximity = TRUE;
gimp_display_shell_check_device_cursor (shell);
}
}
static void
gimp_display_shell_proximity_out (GimpDisplayShell *shell)
{
if (shell->proximity)
{
shell->proximity = FALSE;
gimp_display_shell_clear_software_cursor (shell);
}
}
static void
gimp_display_shell_check_device_cursor (GimpDisplayShell *shell)
{
GimpDeviceManager *manager;
GimpDeviceInfo *current_device;
manager = gimp_devices_get_manager (shell->display->gimp);
current_device = gimp_device_manager_get_current_device (manager);
shell->draw_cursor = ! gimp_device_info_has_cursor (current_device);
}
static void
gimp_display_shell_start_scrolling (GimpDisplayShell *shell,
const GdkEvent *event,
GdkModifierType state,
gint x,
gint y)
{
g_return_if_fail (! shell->scrolling);
gimp_display_shell_pointer_grab (shell, event, GDK_POINTER_MOTION_MASK);
shell->scrolling = TRUE;
shell->scroll_last_x = x;
shell->scroll_last_y = y;
shell->rotating = (state & GDK_SHIFT_MASK) ? TRUE : FALSE;
shell->rotate_drag_angle = shell->rotate_angle;
if (shell->rotating)
gimp_display_shell_set_override_cursor (shell,
(GimpCursorType) GDK_EXCHANGE);
else
gimp_display_shell_set_override_cursor (shell,
(GimpCursorType) GDK_FLEUR);
}
static void
gimp_display_shell_stop_scrolling (GimpDisplayShell *shell,
const GdkEvent *event)
{
g_return_if_fail (shell->scrolling);
gimp_display_shell_unset_override_cursor (shell);
shell->scrolling = FALSE;
shell->scroll_last_x = 0;
shell->scroll_last_y = 0;
shell->rotating = FALSE;
shell->rotate_drag_angle = 0.0;
gimp_display_shell_pointer_ungrab (shell, event);
}
static void
gimp_display_shell_space_pressed (GimpDisplayShell *shell,
const GdkEvent *event)
{
Gimp *gimp = gimp_display_get_gimp (shell->display);
if (shell->space_pressed)
return;
if (! gimp_display_shell_keyboard_grab (shell, event))
return;
switch (shell->display->config->space_bar_action)
{
case GIMP_SPACE_BAR_ACTION_NONE:
break;
case GIMP_SPACE_BAR_ACTION_PAN:
{
GimpDeviceManager *manager;
GimpDeviceInfo *current_device;
GimpCoords coords;
GdkModifierType state = 0;
manager = gimp_devices_get_manager (gimp);
current_device = gimp_device_manager_get_current_device (manager);
gimp_device_info_get_device_coords (current_device,
gtk_widget_get_window (shell->canvas),
&coords);
gdk_event_get_state (event, &state);
gimp_display_shell_start_scrolling (shell, event, state,
coords.x, coords.y);
}
break;
case GIMP_SPACE_BAR_ACTION_MOVE:
{
GimpTool *active_tool = tool_manager_get_active (gimp);
if (active_tool || ! GIMP_IS_MOVE_TOOL (active_tool))
{
GdkModifierType state;
shell->space_shaded_tool =
gimp_object_get_name (active_tool->tool_info);
gimp_context_set_tool (gimp_get_user_context (gimp),
gimp_get_tool_info (gimp, "gimp-move-tool"));
gdk_event_get_state (event, &state);
gimp_display_shell_update_focus (shell, TRUE,
NULL, state);
}
}
break;
}
shell->space_pressed = TRUE;
}
static void
gimp_display_shell_space_released (GimpDisplayShell *shell,
const GdkEvent *event,
const GimpCoords *image_coords)
{
Gimp *gimp = gimp_display_get_gimp (shell->display);
if (! shell->space_pressed && ! shell->space_release_pending)
return;
switch (shell->display->config->space_bar_action)
{
case GIMP_SPACE_BAR_ACTION_NONE:
break;
case GIMP_SPACE_BAR_ACTION_PAN:
gimp_display_shell_stop_scrolling (shell, event);
break;
case GIMP_SPACE_BAR_ACTION_MOVE:
if (shell->space_shaded_tool)
{
gimp_context_set_tool (gimp_get_user_context (gimp),
gimp_get_tool_info (gimp,
shell->space_shaded_tool));
shell->space_shaded_tool = NULL;
if (gtk_widget_has_focus (shell->canvas))
{
GdkModifierType state;
gdk_event_get_state (event, &state);
gimp_display_shell_update_focus (shell, TRUE,
image_coords, state);
}
else
{
gimp_display_shell_update_focus (shell, FALSE,
image_coords, 0);
}
}
break;
}
gimp_display_shell_keyboard_ungrab (shell, event);
shell->space_pressed = FALSE;
shell->space_release_pending = FALSE;
}
static gboolean
gimp_display_shell_tab_pressed (GimpDisplayShell *shell,
const GdkEventKey *kevent)
{
GimpImageWindow *window = gimp_display_shell_get_window (shell);
GimpUIManager *manager = gimp_image_window_get_ui_manager (window);
GimpImage *image = gimp_display_get_image (shell->display);
if (kevent->state & GDK_CONTROL_MASK)
{
if (image && ! gimp_image_is_empty (image))
{
if (kevent->keyval == GDK_KEY_Tab ||
kevent->keyval == GDK_KEY_KP_Tab)
gimp_display_shell_layer_select_init (shell,
1, kevent->time);
else
gimp_display_shell_layer_select_init (shell,
-1, kevent->time);
return TRUE;
}
}
else if (kevent->state & GDK_MOD1_MASK)
{
if (image)
{
if (kevent->keyval == GDK_KEY_Tab ||
kevent->keyval == GDK_KEY_KP_Tab)
gimp_ui_manager_activate_action (manager, "windows",
"windows-show-display-next");
else
gimp_ui_manager_activate_action (manager, "windows",
"windows-show-display-previous");
return TRUE;
}
}
else
{
gimp_ui_manager_activate_action (manager, "windows",
"windows-hide-docks");
return TRUE;
}
return FALSE;
}
static void
gimp_display_shell_update_focus (GimpDisplayShell *shell,
gboolean focus_in,
const GimpCoords *image_coords,
GdkModifierType state)
{
Gimp *gimp = gimp_display_get_gimp (shell->display);
if (focus_in)
{
tool_manager_focus_display_active (gimp, shell->display);
tool_manager_modifier_state_active (gimp, state, shell->display);
}
else
{
tool_manager_focus_display_active (gimp, NULL);
}
if (image_coords)
tool_manager_oper_update_active (gimp,
image_coords, state,
shell->proximity,
shell->display);
}
static void
gimp_display_shell_update_cursor (GimpDisplayShell *shell,
const GimpCoords *display_coords,
const GimpCoords *image_coords,
GdkModifierType state,
gboolean update_software_cursor)
{
GimpDisplay *display = shell->display;
Gimp *gimp = gimp_display_get_gimp (display);
GimpImage *image = gimp_display_get_image (display);
GimpTool *active_tool;
if (! shell->display->config->cursor_updating)
return;
active_tool = tool_manager_get_active (gimp);
if (active_tool)
{
if ((! gimp_image_is_empty (image) ||
gimp_tool_control_get_handle_empty_image (active_tool->control)) &&
! (state & (GDK_BUTTON1_MASK |
GDK_BUTTON2_MASK |
GDK_BUTTON3_MASK)))
{
tool_manager_cursor_update_active (gimp,
image_coords, state,
display);
}
else if (gimp_image_is_empty (image) &&
! gimp_tool_control_get_handle_empty_image (active_tool->control))
{
gimp_display_shell_set_cursor (shell,
GIMP_CURSOR_MOUSE,
gimp_tool_control_get_tool_cursor (active_tool->control),
GIMP_CURSOR_MODIFIER_BAD);
}
}
else
{
gimp_display_shell_set_cursor (shell,
GIMP_CURSOR_MOUSE,
GIMP_TOOL_CURSOR_NONE,
GIMP_CURSOR_MODIFIER_BAD);
}
if (update_software_cursor)
{
GimpCursorPrecision precision = GIMP_CURSOR_PRECISION_PIXEL_CENTER;
if (active_tool)
precision = gimp_tool_control_get_precision (active_tool->control);
gimp_display_shell_update_software_cursor (shell,
precision,
(gint) display_coords->x,
(gint) display_coords->y,
image_coords->x,
image_coords->y);
}
}
static gboolean
gimp_display_shell_initialize_tool (GimpDisplayShell *shell,
const GimpCoords *image_coords,
GdkModifierType state)
{
GimpDisplay *display = shell->display;
GimpImage *image = gimp_display_get_image (display);
Gimp *gimp = gimp_display_get_gimp (display);
gboolean initialized = FALSE;
GimpTool *active_tool;
active_tool = tool_manager_get_active (gimp);
if (active_tool &&
(! gimp_image_is_empty (image) ||
gimp_tool_control_get_handle_empty_image (active_tool->control)))
{
initialized = TRUE;
/* initialize the current tool if it has no drawable */
if (! active_tool->drawable)
{
initialized = tool_manager_initialize_active (gimp, display);
}
else if ((active_tool->drawable !=
gimp_image_get_active_drawable (image)) &&
(! gimp_tool_control_get_preserve (active_tool->control) &&
(gimp_tool_control_get_dirty_mask (active_tool->control) &
GIMP_DIRTY_ACTIVE_DRAWABLE)))
{
/* create a new one, deleting the current */
gimp_context_tool_changed (gimp_get_user_context (gimp));
/* make sure the newly created tool has the right state */
gimp_display_shell_update_focus (shell, TRUE, image_coords, state);
initialized = tool_manager_initialize_active (gimp, display);
}
}
return initialized;
}
static void
gimp_display_shell_get_event_coords (GimpDisplayShell *shell,
const GdkEvent *event,
GimpCoords *display_coords,
GdkModifierType *state,
guint32 *time)
{
Gimp *gimp = gimp_display_get_gimp (shell->display);
GimpDeviceManager *manager;
GimpDeviceInfo *current_device;
manager = gimp_devices_get_manager (gimp);
current_device = gimp_device_manager_get_current_device (manager);
gimp_device_info_get_event_coords (current_device,
gtk_widget_get_window (shell->canvas),
event,
display_coords);
gimp_device_info_get_event_state (current_device,
gtk_widget_get_window (shell->canvas),
event,
state);
*time = gdk_event_get_time (event);
}
static void
gimp_display_shell_untransform_event_coords (GimpDisplayShell *shell,
const GimpCoords *display_coords,
GimpCoords *image_coords,
gboolean *update_software_cursor)
{
Gimp *gimp = gimp_display_get_gimp (shell->display);
GimpTool *active_tool;
/* GimpCoords passed to tools are ALWAYS in image coordinates */
gimp_display_shell_untransform_coords (shell,
display_coords,
image_coords);
active_tool = tool_manager_get_active (gimp);
if (active_tool && gimp_tool_control_get_snap_to (active_tool->control))
{
gint x, y, width, height;
gimp_tool_control_get_snap_offsets (active_tool->control,
&x, &y, &width, &height);
if (gimp_display_shell_snap_coords (shell,
image_coords,
x, y, width, height))
{
if (update_software_cursor)
*update_software_cursor = TRUE;
}
}
}
/* gimp_display_shell_compress_motion:
*
* This function walks the whole GDK event queue seeking motion events
* corresponding to the widget 'widget'. If it finds any it will
* remove them from the queue, and return the most recent motion event.
* Otherwise it will return NULL.
*
* The gimp_display_shell_compress_motion function source may be re-used under
* the XFree86-style license. <adam@gimp.org>
*/
static GdkEvent *
gimp_display_shell_compress_motion (GimpDisplayShell *shell)
{
GList *requeued_events = NULL;
const GList *list;
GdkEvent *last_motion = NULL;
/* Move the entire GDK event queue to a private list, filtering
* out any motion events for the desired widget.
*/
while (gdk_events_pending ())
{
GdkEvent *event = gdk_event_get ();
if (!event)
{
/* Do nothing */
}
else if ((gtk_get_event_widget (event) == shell->canvas) &&
(event->any.type == GDK_MOTION_NOTIFY))
{
if (last_motion)
gdk_event_free (last_motion);
last_motion = event;
}
else if ((gtk_get_event_widget (event) == shell->canvas) &&
(event->any.type == GDK_BUTTON_RELEASE))
{
requeued_events = g_list_prepend (requeued_events, event);
while (gdk_events_pending ())
if ((event = gdk_event_get ()))
requeued_events = g_list_prepend (requeued_events, event);
break;
}
else
{
requeued_events = g_list_prepend (requeued_events, event);
}
}
/* Replay the remains of our private event list back into the
* event queue in order.
*/
requeued_events = g_list_reverse (requeued_events);
for (list = requeued_events; list; list = g_list_next (list))
{
GdkEvent *event = list->data;
gdk_event_put (event);
gdk_event_free (event);
}
g_list_free (requeued_events);
return last_motion;
}
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