gimp/app/disp_callbacks.c

379 lines
9.2 KiB
C

/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include "gdk/gdkkeysyms.h"
#include "appenv.h"
#include "colormaps.h"
#include "cursorutil.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
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 ();
}
}
gint
gdisplay_canvas_events (GtkWidget *canvas,
GdkEvent *event)
{
GDisplay *gdisp;
GdkEventExpose *eevent;
GdkEventMotion *mevent;
GdkEventButton *bevent;
GdkEventKey *kevent;
gint tx, ty;
GdkModifierType tmask;
guint state = 0;
gint return_val = FALSE;
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);
}
/* get the pointer position */
gdk_window_get_pointer (canvas->window, &tx, &ty, &tmask);
switch (event->type)
{
case GDK_EXPOSE:
eevent = (GdkEventExpose *) event;
redraw (gdisp, eevent->area.x, eevent->area.y,
eevent->area.width, eevent->area.height);
break;
case GDK_CONFIGURE:
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_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
state = bevent->state;
switch (bevent->button)
{
case 1:
gtk_grab_add (canvas);
if (!active_tool)
active_tool_control (RECREATE, gdisp);
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;
}
if (gimage_get_active_layer (gdisp->gimage) != active_tool_layer)
{
active_tool_control (RECREATE, gdisp);
active_tool_layer = gimage_get_active_layer (gdisp->gimage);
}
(* active_tool->button_press_func) (active_tool, bevent, gdisp);
}
break;
case 2:
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:
gtk_grab_remove (canvas);
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:
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;
if (mevent->is_hint)
{
mevent->x = tx;
mevent->y = ty;
mevent->state = tmask;
}
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)
{
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);
}
return return_val;
}
gint
gdisplay_hruler_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer data)
{
GDisplay *gdisp;
if (event->button == 1)
{
gdisp = data;
if (!active_tool)
active_tool_control (RECREATE, gdisp);
gtk_widget_activate (tool_widgets[tool_info[(int) MOVE].toolbar_position]);
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;
if (!active_tool)
active_tool_control (RECREATE, gdisp);
gtk_widget_activate (tool_widgets[tool_info[(int) MOVE].toolbar_position]);
move_tool_start_vguide (active_tool, gdisp);
gtk_grab_add (gdisp->canvas);
}
return FALSE;
}