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gimp/app/disp_callbacks.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include "gdk/gdkkeysyms.h"
#include "appenv.h"
#include "colormaps.h"
#include "cursorutil.h"
#include "devices.h"
#include "disp_callbacks.h"
#include "gdisplay.h"
#include "general.h"
#include "gimprc.h"
#include "interface.h"
#include "layer_select.h"
#include "move.h"
#include "scale.h"
#include "scroll.h"
#include "tools.h"
#include "gimage.h"
#define HORIZONTAL 1
#define VERTICAL 2
/* Function declarations */
static void gdisplay_check_device_cursor (GDisplay *gdisp);
static void
redraw (GDisplay *gdisp,
int x,
int y,
int w,
int h)
{
long x1, y1, x2, y2; /* coordinate of rectangle corners */
x1 = x;
y1 = y;
x2 = (x+w);
y2 = (y+h);
x1 = BOUNDS (x1, 0, gdisp->disp_width);
y1 = BOUNDS (y1, 0, gdisp->disp_height);
x2 = BOUNDS (x2, 0, gdisp->disp_width);
y2 = BOUNDS (y2, 0, gdisp->disp_height);
if ((x2 - x1) && (y2 - y1))
{
gdisplay_expose_area (gdisp, x1, y1, (x2 - x1), (y2 - y1));
gdisplays_flush ();
}
}
static void
gdisplay_check_device_cursor (GDisplay *gdisp)
{
GList *tmp_list;
/* gdk_input_list_devices returns an internal list, so we shouldn't
free it afterwards */
tmp_list = gdk_input_list_devices();
while (tmp_list)
{
GdkDeviceInfo *info = (GdkDeviceInfo *)tmp_list->data;
if (info->deviceid == current_device)
{
gdisp->draw_cursor = !info->has_cursor;
break;
}
tmp_list = tmp_list->next;
}
}
gint
gdisplay_canvas_events (GtkWidget *canvas,
GdkEvent *event)
{
GDisplay *gdisp;
GdkEventExpose *eevent;
GdkEventMotion *mevent;
GdkEventButton *bevent;
GdkEventKey *kevent;
gdouble tx, ty;
guint state = 0;
gint return_val = FALSE;
static gboolean scrolled = FALSE;
static guint key_signal_id = 0;
int update_cursor = 1;
tx = ty = 0;
gdisp = (GDisplay *) gtk_object_get_user_data (GTK_OBJECT (canvas));
if (!canvas->window)
return FALSE;
/* If this is the first event... */
if (!gdisp->select)
{
/* create the selection object */
gdisp->select = selection_create (gdisp->canvas->window, gdisp,
gdisp->gimage->height,
gdisp->gimage->width, marching_speed);
gdisp->disp_width = gdisp->canvas->allocation.width;
gdisp->disp_height = gdisp->canvas->allocation.height;
/* create GC for scrolling */
gdisp->scroll_gc = gdk_gc_new (gdisp->canvas->window);
gdk_gc_set_exposures (gdisp->scroll_gc, TRUE);
/* set up the scrollbar observers */
gtk_signal_connect (GTK_OBJECT (gdisp->hsbdata), "value_changed",
(GtkSignalFunc) scrollbar_horz_update,
gdisp);
gtk_signal_connect (GTK_OBJECT (gdisp->vsbdata), "value_changed",
(GtkSignalFunc) scrollbar_vert_update,
gdisp);
/* setup scale properly */
setup_scale (gdisp);
}
/* Find out what device the event occurred upon */
if (devices_check_change (event))
gdisplay_check_device_cursor (gdisp);
switch (event->type)
{
case GDK_EXPOSE:
eevent = (GdkEventExpose *) event;
/*printf(" EXP:%d,%d(%dx%d) ",eevent->area.x, eevent->area.y,
eevent->area.width, eevent->area.height);fflush(stdout);*/
redraw (gdisp, eevent->area.x, eevent->area.y,
eevent->area.width, eevent->area.height);
break;
case GDK_CONFIGURE:
/*printf(" CNF ");fflush(stdout);*/
if ((gdisp->disp_width != gdisp->canvas->allocation.width) ||
(gdisp->disp_height != gdisp->canvas->allocation.height))
{
gdisp->disp_width = gdisp->canvas->allocation.width;
gdisp->disp_height = gdisp->canvas->allocation.height;
resize_display (gdisp, 0, FALSE);
}
break;
case GDK_LEAVE_NOTIFY:
gdisplay_update_cursor (gdisp, 0, 0);
gtk_label_set(GTK_LABEL (gdisp->cursor_label), "");
case GDK_PROXIMITY_OUT:
gdisp->proximity = FALSE;
update_cursor = 0;
break;
case GDK_ENTER_NOTIFY:
update_cursor = 0; /* Actually, should figure out tx,ty here */
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
state = bevent->state;
switch (bevent->button)
{
case 1:
gtk_grab_add (canvas);
/* This is a hack to prevent other stuff being run in the middle of
a tool operation (like changing image types.... brrrr). We just
block all the keypress event. A better solution is to implement
some sort of locking for images.
Note that this is dependent on specific GTK behavior, and isn't
guaranteed to work in future versions of GTK.
-Yosh
*/
if (key_signal_id == 0)
key_signal_id = gtk_signal_connect (GTK_OBJECT (canvas),
"key_press_event",
GTK_SIGNAL_FUNC (gtk_true),
NULL);
if (active_tool && ((active_tool->type == MOVE) ||
!gimage_is_empty (gdisp->gimage)))
{
if (active_tool->auto_snap_to)
{
gdisplay_snap_point (gdisp, bevent->x, bevent->y, &tx, &ty);
bevent->x = tx;
bevent->y = ty;
}
/* reset the current tool if we're changing gdisplays */
/*
if (active_tool->gdisp_ptr) {
tool_gdisp = active_tool->gdisp_ptr;
if (tool_gdisp != gdisp) {
tools_initialize (active_tool->type, gdisp);
active_tool->drawable = gimage_active_drawable(gdisp->gimage);
}
} else
*/
/* reset the current tool if we're changing drawables */
if (active_tool->drawable) {
if (((gimage_active_drawable(gdisp->gimage)) !=
active_tool->drawable) &&
!active_tool->preserve)
tools_initialize (active_tool->type, gdisp);
} else
active_tool->drawable = gimage_active_drawable(gdisp->gimage);
(* active_tool->button_press_func) (active_tool, bevent, gdisp);
}
break;
case 2:
scrolled = TRUE;
gtk_grab_add (canvas);
start_grab_and_scroll (gdisp, bevent);
break;
case 3:
popup_shell = gdisp->shell;
gdisplay_set_menu_sensitivity (gdisp);
gtk_menu_popup (GTK_MENU (gdisp->popup), NULL, NULL, NULL, NULL, 3, bevent->time);
break;
default:
break;
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
state = bevent->state;
switch (bevent->button)
{
case 1:
/* Lame hack. See above */
if (key_signal_id)
{
gtk_signal_disconnect (GTK_OBJECT (canvas), key_signal_id);
key_signal_id = 0;
}
gtk_grab_remove (canvas);
gdk_pointer_ungrab (bevent->time); /* fixes pointer grab bug */
if (active_tool && ((active_tool->type == MOVE) ||
!gimage_is_empty (gdisp->gimage)))
if (active_tool->state == ACTIVE)
{
if (active_tool->auto_snap_to)
{
gdisplay_snap_point (gdisp, bevent->x, bevent->y, &tx, &ty);
bevent->x = tx;
bevent->y = ty;
}
(* active_tool->button_release_func) (active_tool, bevent, gdisp);
}
break;
case 2:
scrolled = FALSE;
gtk_grab_remove (canvas);
end_grab_and_scroll (gdisp, bevent);
break;
case 3:
break;
default:
break;
}
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
state = mevent->state;
/* Ask for the pointer position, but ignore it except for cursor
* handling, so motion events sync with the button press/release events */
if (mevent->is_hint)
gdk_input_window_get_pointer (canvas->window, current_device, &tx, &ty,
NULL, NULL, NULL, NULL);
else
{
tx = mevent->x;
ty = mevent->y;
}
if (!gdisp->proximity)
{
gdisp->proximity = TRUE;
gdisplay_check_device_cursor (gdisp);
}
if (active_tool && ((active_tool->type == MOVE) ||
!gimage_is_empty (gdisp->gimage)) &&
(mevent->state & GDK_BUTTON1_MASK))
{
if (active_tool->state == ACTIVE)
{
/* if the first mouse button is down, check for automatic
* scrolling...
*/
if ((mevent->state & Button1Mask) && !active_tool->scroll_lock)
{
if (mevent->x < 0 || mevent->y < 0 ||
mevent->x > gdisp->disp_width ||
mevent->y > gdisp->disp_height)
scroll_to_pointer_position (gdisp, mevent);
}
if (active_tool->auto_snap_to)
{
gdisplay_snap_point (gdisp, mevent->x, mevent->y, &tx, &ty);
mevent->x = tx;
mevent->y = ty;
}
(* active_tool->motion_func) (active_tool, mevent, gdisp);
}
}
else if ((mevent->state & GDK_BUTTON2_MASK) && scrolled)
{
grab_and_scroll (gdisp, mevent);
}
break;
case GDK_KEY_PRESS:
kevent = (GdkEventKey *) event;
state = kevent->state;
switch (kevent->keyval)
{
case GDK_Left: case GDK_Right:
case GDK_Up: case GDK_Down:
if (active_tool && !gimage_is_empty (gdisp->gimage))
(* active_tool->arrow_keys_func) (active_tool, kevent, gdisp);
return_val = TRUE;
break;
case GDK_Tab:
if (kevent->state & GDK_MOD1_MASK && !gimage_is_empty (gdisp->gimage))
layer_select_init (gdisp->gimage, 1, kevent->time);
if (kevent->state & GDK_CONTROL_MASK && !gimage_is_empty (gdisp->gimage))
layer_select_init (gdisp->gimage, -1, kevent->time);
return_val = TRUE;
break;
/* Update the state based on modifiers being pressed */
case GDK_Alt_L: case GDK_Alt_R:
state |= GDK_MOD1_MASK;
break;
case GDK_Shift_L: case GDK_Shift_R:
state |= GDK_SHIFT_MASK;
break;
case GDK_Control_L: case GDK_Control_R:
state |= GDK_CONTROL_MASK;
break;
}
/* We need this here in case of accelerators */
gdisplay_set_menu_sensitivity (gdisp);
break;
case GDK_KEY_RELEASE:
kevent = (GdkEventKey *) event;
state = kevent->state;
switch (kevent->keyval)
{
case GDK_Alt_L: case GDK_Alt_R:
state &= ~GDK_MOD1_MASK;
break;
case GDK_Shift_L: case GDK_Shift_R:
kevent->state &= ~GDK_SHIFT_MASK;
break;
case GDK_Control_L: case GDK_Control_R:
kevent->state &= ~GDK_CONTROL_MASK;
break;
}
return_val = TRUE;
break;
default:
break;
}
if (no_cursor_updating == 0)
{
if (active_tool && !gimage_is_empty (gdisp->gimage) &&
!(state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)))
{
GdkEventMotion me;
me.x = tx; me.y = ty;
me.state = state;
(* active_tool->cursor_update_func) (active_tool, &me, gdisp);
}
else if (gimage_is_empty (gdisp->gimage))
gdisplay_install_tool_cursor (gdisp, GDK_TOP_LEFT_ARROW);
}
if (update_cursor)
gdisplay_update_cursor (gdisp, tx, ty);
return return_val;
}
gint
gdisplay_hruler_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer data)
{
GDisplay *gdisp;
if (event->button == 1)
{
gdisp = data;
gtk_widget_activate (tool_info[(int) MOVE].tool_widget);
move_tool_start_hguide (active_tool, gdisp);
gtk_grab_add (gdisp->canvas);
}
return FALSE;
}
gint
gdisplay_vruler_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer data)
{
GDisplay *gdisp;
if (event->button == 1)
{
gdisp = data;
gtk_widget_activate (tool_info[(int) MOVE].tool_widget);
move_tool_start_vguide (active_tool, gdisp);
gtk_grab_add (gdisp->canvas);
}
return FALSE;
}
gint
gdisplay_origin_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer data)
{
GDisplay *gdisp;
if (event->button == 1)
{
gdisp = data;
popup_shell = gdisp->shell;
gdisplay_set_menu_sensitivity (gdisp);
gtk_menu_popup (GTK_MENU (gdisp->popup), NULL, NULL, NULL, NULL, 1, event->time);
/* Stop the signal emission so the button doesn't grab the
* pointer away from us
*/
gtk_signal_emit_stop_by_name (GTK_OBJECT (widget), "button_press_event");
}
return FALSE;
}
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