gimp/app/move.c

462 lines
11 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include "appenv.h"
#include "draw_core.h"
#include "edit_selection.h"
#include "errors.h"
#include "floating_sel.h"
#include "gimage_mask.h"
#include "gdisplay.h"
#include "gdisplay_ops.h"
#include "move.h"
#include "undo.h"
typedef struct _MoveTool MoveTool;
struct _MoveTool
{
Layer *layer;
Guide *guide;
GDisplay *disp;
};
/* move tool action functions */
static void move_tool_button_press (Tool *, GdkEventButton *, gpointer);
static void move_tool_button_release (Tool *, GdkEventButton *, gpointer);
static void move_tool_motion (Tool *, GdkEventMotion *, gpointer);
static void move_tool_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void move_tool_control (Tool *, int, gpointer);
static void move_create_gc (GDisplay *);
static void *move_options = NULL;
static GdkGC *move_gc = NULL;
/* move action functions */
static void
move_tool_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay * gdisp;
MoveTool * move;
Layer * layer;
Guide * guide;
int x, y;
gdisp = (GDisplay *) gdisp_ptr;
move = (MoveTool *) tool->private;
tool->gdisp_ptr = gdisp_ptr;
move->layer = NULL;
move->guide = NULL;
move->disp = NULL;
gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, FALSE);
if (bevent->state & GDK_MOD1_MASK)
{
init_edit_selection (tool, gdisp_ptr, bevent, MaskTranslate);
tool->state = ACTIVE;
}
else if (bevent->state & GDK_SHIFT_MASK)
{
init_edit_selection (tool, gdisp_ptr, bevent, LayerTranslate);
tool->state = ACTIVE;
}
else
{
if (gdisp->draw_guides && (guide = gdisplay_find_guide (gdisp, bevent->x, bevent->y)))
{
undo_push_guide (gdisp->gimage, guide);
move->guide = NULL;
gdisplays_expose_guide (gdisp->gimage, guide);
gimage_remove_guide (gdisp->gimage, guide);
gdisplay_flush (gdisp);
gimage_add_guide (gdisp->gimage, guide);
move->guide = guide;
move->disp = gdisp;
tool->scroll_lock = TRUE;
tool->state = ACTIVE;
move_tool_motion (tool, NULL, gdisp);
}
else if ((layer = gimage_pick_correlate_layer (gdisp->gimage, x, y)))
{
/* If there is a floating selection, and this aint it, use the move tool */
if (gimage_floating_sel (gdisp->gimage) && !layer_is_floating_sel (layer))
move->layer = gimage_floating_sel (gdisp->gimage);
/* Otherwise, init the edit selection */
else
{
gimage_set_active_layer (gdisp->gimage, layer);
init_edit_selection (tool, gdisp_ptr, bevent, LayerTranslate);
}
tool->state = ACTIVE;
}
}
/* if we've got an active tool grab the pointer */
if (tool->state == ACTIVE)
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
}
static void
move_draw_guide (GDisplay *gdisp, Guide *guide)
{
int x1, y1;
int x2, y2;
int w, h;
int x, y;
if (!move_gc)
move_create_gc (gdisp);
if (guide->position == -1)
return;
gdisplay_transform_coords (gdisp, gdisp->gimage->width,
gdisp->gimage->height, &x2, &y2, FALSE);
gdk_window_get_size (gdisp->canvas->window, &w, &h);
switch (guide->orientation) {
case HORIZONTAL_GUIDE:
gdisplay_transform_coords (gdisp, 0, guide->position, &x1, &y, FALSE);
if (x1 < 0) x1 = 0;
if (x2 > w) x2 = w;
gdk_draw_line (gdisp->canvas->window, move_gc, x1, y, x2, y);
break;
case VERTICAL_GUIDE:
gdisplay_transform_coords (gdisp, guide->position, 0, &x, &y1, FALSE);
if (y1 < 0) y1 = 0;
if (y2 > h) y2 = h;
gdk_draw_line (gdisp->canvas->window, move_gc, x, y1, x, y2);
break;
}
}
static void
move_tool_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
MoveTool * move;
GDisplay * gdisp;
int remove_guide;
int x1, y1;
int x2, y2;
gdisp = (GDisplay *) gdisp_ptr;
move = (MoveTool *) tool->private;
gdk_flush ();
tool->state = INACTIVE;
gdk_pointer_ungrab (bevent->time);
if (move->guide)
{
tool->scroll_lock = FALSE;
remove_guide = FALSE;
gdisplay_untransform_coords (gdisp, 0, 0, &x1, &y1, FALSE, FALSE);
gdisplay_untransform_coords (gdisp, gdisp->disp_width, gdisp->disp_height, &x2, &y2, FALSE, FALSE);
if (x1 < 0) x1 = 0;
if (y1 < 0) y1 = 0;
if (x2 > gdisp->gimage->width) x2 = gdisp->gimage->width;
if (y2 > gdisp->gimage->height) y2 = gdisp->gimage->height;
switch (move->guide->orientation)
{
case HORIZONTAL_GUIDE:
if ((move->guide->position < y1) || (move->guide->position > y2))
remove_guide = TRUE;
break;
case VERTICAL_GUIDE:
if ((move->guide->position < x1) || (move->guide->position > x2))
remove_guide = TRUE;
break;
}
gdisplays_expose_guide (gdisp->gimage, move->guide);
if (remove_guide)
{
move_draw_guide (gdisp, move->guide);
move->guide->position = -1;
move->guide = NULL;
move->disp = NULL;
}
else
{
move_tool_motion (tool, NULL, gdisp_ptr);
}
selection_resume (gdisp->select);
gdisplays_flush ();
if (move->guide)
gdisplay_draw_guide (gdisp, move->guide, TRUE);
}
else
{
/* First take care of the case where the user "cancels" the action */
if (! (bevent->state & GDK_BUTTON3_MASK))
{
if (move->layer)
{
floating_sel_anchor (move->layer);
gdisplays_flush ();
}
}
}
}
static void
move_tool_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
MoveTool *private;
int x, y;
gdisp = gdisp_ptr;
private = tool->private;
if (private->guide)
{
move_draw_guide (gdisp, private->guide);
if (mevent)
{
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y,
&x, &y, TRUE, FALSE);
if (private->guide->orientation == HORIZONTAL_GUIDE)
private->guide->position = y;
else
private->guide->position = x;
move_draw_guide (gdisp, private->guide);
}
}
}
static void
move_tool_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
MoveTool *move;
GDisplay *gdisp;
Guide *guide;
Layer *layer;
int x, y;
move = tool->private;
gdisp = (GDisplay *) gdisp_ptr;
gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, FALSE, FALSE);
if (mevent->state & GDK_MOD1_MASK)
gdisplay_install_tool_cursor (gdisp, GDK_DIAMOND_CROSS);
else if (mevent->state & GDK_SHIFT_MASK)
gdisplay_install_tool_cursor (gdisp, GDK_FLEUR);
else
{
if (gdisp->draw_guides && (guide = gdisplay_find_guide (gdisp, mevent->x, mevent->y)))
{
tool->gdisp_ptr = gdisp_ptr;
gdisplay_install_tool_cursor (gdisp, GDK_HAND2);
if (tool->state != ACTIVE)
{
if (move->guide)
{
gdisp = move->disp;
if (gdisp)
gdisplay_draw_guide (gdisp, move->guide, FALSE);
}
gdisp = gdisp_ptr;
gdisplay_draw_guide (gdisp, guide, TRUE);
move->guide = guide;
move->disp = gdisp;
}
}
else if ((layer = gimage_pick_correlate_layer (gdisp->gimage, x, y)))
{
/* if there is a floating selection, and this aint it... */
if (gimage_floating_sel (gdisp->gimage) && !layer_is_floating_sel (layer))
gdisplay_install_tool_cursor (gdisp, GDK_SB_DOWN_ARROW);
else if (layer == gdisp->gimage->active_layer)
gdisplay_install_tool_cursor (gdisp, GDK_FLEUR);
else
gdisplay_install_tool_cursor (gdisp, GDK_HAND2);
}
else
gdisplay_install_tool_cursor (gdisp, GDK_TOP_LEFT_ARROW);
}
}
static void
move_tool_control (Tool *tool,
int action,
gpointer gdisp_ptr)
{
MoveTool *move;
move = tool->private;
switch (action)
{
case PAUSE :
break;
case RESUME :
if (move->guide)
gdisplay_draw_guide (gdisp_ptr, move->guide, TRUE);
break;
case HALT :
break;
}
}
static void
move_create_gc (GDisplay *gdisp)
{
if (!move_gc)
{
GdkGCValues values;
values.foreground.pixel = gdisplay_white_pixel (gdisp);
values.function = GDK_INVERT;
move_gc = gdk_gc_new_with_values (gdisp->canvas->window, &values, GDK_GC_FUNCTION);
}
}
void
move_tool_start_hguide (Tool *tool,
void *data)
{
MoveTool *private;
GDisplay *gdisp;
gdisp = data;
selection_pause (gdisp->select);
tool->gdisp_ptr = gdisp;
tool->scroll_lock = TRUE;
private = tool->private;
private->guide = gimage_add_hguide (gdisp->gimage);
tool->state = ACTIVE;
undo_push_guide (gdisp->gimage, private->guide);
}
void
move_tool_start_vguide (Tool *tool,
void *data)
{
MoveTool *private;
GDisplay *gdisp;
gdisp = data;
selection_pause (gdisp->select);
tool->gdisp_ptr = gdisp;
tool->scroll_lock = TRUE;
private = tool->private;
private->guide = gimage_add_vguide (gdisp->gimage);
tool->state = ACTIVE;
undo_push_guide (gdisp->gimage, private->guide);
}
Tool *
tools_new_move_tool ()
{
Tool * tool;
MoveTool * private;
if (! move_options)
move_options = tools_register_no_options (MOVE, "Move Tool Options");
tool = (Tool *) g_malloc (sizeof (Tool));
private = (MoveTool *) g_malloc (sizeof (MoveTool));
tool->type = MOVE;
tool->state = INACTIVE;
tool->scroll_lock = 0; /* Allow scrolling */
tool->auto_snap_to = FALSE;
tool->private = (void *) private;
tool->button_press_func = move_tool_button_press;
tool->button_release_func = move_tool_button_release;
tool->motion_func = move_tool_motion;
tool->arrow_keys_func = edit_sel_arrow_keys_func;
tool->cursor_update_func = move_tool_cursor_update;
tool->control_func = move_tool_control;
tool->preserve = TRUE;
private->layer = NULL;
private->guide = NULL;
private->disp = NULL;
return tool;
}
void
tools_free_move_tool (Tool *tool)
{
MoveTool * move;
move = (MoveTool *) tool->private;
if (tool->gdisp_ptr)
{
if (move->guide)
gdisplay_draw_guide (tool->gdisp_ptr, move->guide, FALSE);
}
g_free (move);
}