mirror of https://github.com/GNOME/gimp.git
453 lines
11 KiB
C
453 lines
11 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include "appenv.h"
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#include "draw_core.h"
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#include "edit_selection.h"
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#include "errors.h"
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#include "floating_sel.h"
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#include "gimage_mask.h"
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#include "gdisplay.h"
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#include "gdisplay_ops.h"
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#include "move.h"
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#include "undo.h"
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typedef struct _MoveTool MoveTool;
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struct _MoveTool
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{
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Layer *layer;
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Guide *guide;
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int guide_disp;
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};
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/* move tool action functions */
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static void move_tool_button_press (Tool *, GdkEventButton *, gpointer);
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static void move_tool_button_release (Tool *, GdkEventButton *, gpointer);
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static void move_tool_motion (Tool *, GdkEventMotion *, gpointer);
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static void move_tool_cursor_update (Tool *, GdkEventMotion *, gpointer);
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static void move_tool_control (Tool *, int, gpointer);
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static void move_create_gc (GDisplay *);
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static void *move_options = NULL;
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static GdkGC *move_gc = NULL;
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/* move action functions */
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static void
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move_tool_button_press (Tool *tool,
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GdkEventButton *bevent,
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gpointer gdisp_ptr)
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{
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GDisplay * gdisp;
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MoveTool * move;
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Layer * layer;
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Guide * guide;
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int x, y;
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gdisp = (GDisplay *) gdisp_ptr;
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move = (MoveTool *) tool->private;
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tool->gdisp_ptr = gdisp_ptr;
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move->layer = NULL;
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move->guide = NULL;
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move->guide_disp = -1;
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gdisplay_untransform_coords (gdisp, bevent->x, bevent->y, &x, &y, FALSE, FALSE);
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if (bevent->state & GDK_MOD1_MASK)
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{
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init_edit_selection (tool, gdisp_ptr, bevent, MaskTranslate);
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tool->state = ACTIVE;
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}
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else if (bevent->state & GDK_SHIFT_MASK)
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{
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init_edit_selection (tool, gdisp_ptr, bevent, LayerTranslate);
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tool->state = ACTIVE;
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}
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else
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{
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if (gdisp->draw_guides && (guide = gdisplay_find_guide (gdisp, bevent->x, bevent->y)))
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{
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undo_push_guide (gdisp->gimage, guide);
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move->guide = NULL;
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gdisplays_expose_guide (gdisp->gimage->ID, guide);
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gimage_remove_guide (gdisp->gimage, guide);
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gdisplay_flush (gdisp);
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gimage_add_guide (gdisp->gimage, guide);
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move->guide = guide;
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move->guide_disp = gdisp->ID;
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tool->scroll_lock = TRUE;
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tool->state = ACTIVE;
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move_tool_motion (tool, NULL, gdisp);
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}
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else if ((layer = gimage_pick_correlate_layer (gdisp->gimage, x, y)))
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{
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/* If there is a floating selection, and this aint it, use the move tool */
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if (gimage_floating_sel (gdisp->gimage) && !layer_is_floating_sel (layer))
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move->layer = gimage_floating_sel (gdisp->gimage);
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/* Otherwise, init the edit selection */
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else
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{
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gimage_set_active_layer (gdisp->gimage, layer);
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init_edit_selection (tool, gdisp_ptr, bevent, LayerTranslate);
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}
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tool->state = ACTIVE;
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}
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}
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/* if we've got an active tool grab the pointer */
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if (tool->state == ACTIVE)
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gdk_pointer_grab (gdisp->canvas->window, FALSE,
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GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
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NULL, NULL, bevent->time);
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}
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void
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move_tool_button_release (Tool *tool,
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GdkEventButton *bevent,
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gpointer gdisp_ptr)
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{
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MoveTool * move;
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GDisplay * gdisp;
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int remove_guide;
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int x1, y1;
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int x2, y2;
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gdisp = (GDisplay *) gdisp_ptr;
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move = (MoveTool *) tool->private;
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gdk_flush ();
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tool->state = INACTIVE;
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gdk_pointer_ungrab (bevent->time);
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if (move->guide)
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{
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tool->scroll_lock = FALSE;
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remove_guide = FALSE;
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gdisplay_untransform_coords (gdisp, 0, 0, &x1, &y1, FALSE, FALSE);
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gdisplay_untransform_coords (gdisp, gdisp->disp_width, gdisp->disp_height, &x2, &y2, FALSE, FALSE);
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if (x1 < 0) x1 = 0;
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if (y1 < 0) y1 = 0;
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if (x2 > gdisp->gimage->width) x2 = gdisp->gimage->width;
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if (y2 > gdisp->gimage->height) y2 = gdisp->gimage->height;
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switch (move->guide->orientation)
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{
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case HORIZONTAL_GUIDE:
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if ((move->guide->position < y1) || (move->guide->position > y2))
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remove_guide = TRUE;
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break;
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case VERTICAL_GUIDE:
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if ((move->guide->position < x1) || (move->guide->position > x2))
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remove_guide = TRUE;
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break;
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}
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gdisplays_expose_guide (gdisp->gimage->ID, move->guide);
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if (remove_guide)
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{
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move->guide->position = -1;
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move->guide = NULL;
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move->guide_disp = -1;
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}
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else
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{
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move_tool_motion (tool, NULL, gdisp_ptr);
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}
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selection_resume (gdisp->select);
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gdisplays_flush ();
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if (move->guide)
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gdisplay_draw_guide (gdisp, move->guide, TRUE);
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}
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else
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{
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/* First take care of the case where the user "cancels" the action */
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if (! (bevent->state & GDK_BUTTON3_MASK))
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{
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if (move->layer)
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{
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floating_sel_anchor (move->layer);
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gdisplays_flush ();
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}
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}
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}
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}
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void
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move_tool_motion (Tool *tool,
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GdkEventMotion *mevent,
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gpointer gdisp_ptr)
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{
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MoveTool *private;
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GDisplay *gdisp;
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int x1, y1;
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int x2, y2;
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int w, h;
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int x, y;
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private = tool->private;
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gdisp = gdisp_ptr;
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if (private->guide)
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{
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if (!move_gc)
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move_create_gc (gdisp);
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gdisplay_transform_coords (gdisp, 0, 0, &x1, &y1, FALSE);
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gdisplay_transform_coords (gdisp, gdisp->gimage->width, gdisp->gimage->height, &x2, &y2, FALSE);
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gdk_window_get_size (gdisp->canvas->window, &w, &h);
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if (x1 < 0) x1 = 0;
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if (y1 < 0) y1 = 0;
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if (x2 > w) x2 = w;
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if (y2 > h) y2 = h;
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if (private->guide->orientation == HORIZONTAL_GUIDE)
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{
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gdisplay_transform_coords (gdisp, 0, private->guide->position, &x, &y, FALSE);
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gdk_draw_line (gdisp->canvas->window, move_gc, x1, y, x2, y);
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if (mevent)
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{
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gdisplay_untransform_coords (gdisp, 0, mevent->y,
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&x, &private->guide->position,
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TRUE, FALSE);
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gdisplay_transform_coords (gdisp, 0, private->guide->position, &x, &y, FALSE);
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gdk_draw_line (gdisp->canvas->window, move_gc, x1, y, x2, y);
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}
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}
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else if (private->guide->orientation == VERTICAL_GUIDE)
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{
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gdisplay_transform_coords (gdisp, private->guide->position, 0, &x, &y, FALSE);
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gdk_draw_line (gdisp->canvas->window, move_gc, x, y1, x, y2);
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if (mevent)
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{
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gdisplay_untransform_coords (gdisp, mevent->x, 0,
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&private->guide->position, &y,
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TRUE, FALSE);
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gdisplay_transform_coords (gdisp, private->guide->position, 0, &x, &y, FALSE);
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gdk_draw_line (gdisp->canvas->window, move_gc, x, y1, x, y2);
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}
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}
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}
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}
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void
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move_tool_cursor_update (Tool *tool,
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GdkEventMotion *mevent,
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gpointer gdisp_ptr)
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{
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MoveTool *move;
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GDisplay *gdisp;
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Guide *guide;
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Layer *layer;
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int x, y;
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move = tool->private;
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gdisp = (GDisplay *) gdisp_ptr;
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gdisplay_untransform_coords (gdisp, mevent->x, mevent->y, &x, &y, FALSE, FALSE);
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if (mevent->state & GDK_MOD1_MASK)
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gdisplay_install_tool_cursor (gdisp, GDK_DIAMOND_CROSS);
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else if (mevent->state & GDK_SHIFT_MASK)
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gdisplay_install_tool_cursor (gdisp, GDK_FLEUR);
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else
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{
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if (gdisp->draw_guides && (guide = gdisplay_find_guide (gdisp, mevent->x, mevent->y)))
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{
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tool->gdisp_ptr = gdisp_ptr;
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gdisplay_install_tool_cursor (gdisp, GDK_HAND2);
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if (tool->state != ACTIVE)
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{
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if (move->guide)
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{
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gdisp = gdisplay_get_ID (move->guide_disp);
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if (gdisp)
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gdisplay_draw_guide (gdisp, move->guide, FALSE);
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}
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gdisp = gdisp_ptr;
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gdisplay_draw_guide (gdisp, guide, TRUE);
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move->guide = guide;
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move->guide_disp = gdisp->ID;
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}
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}
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else if ((layer = gimage_pick_correlate_layer (gdisp->gimage, x, y)))
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{
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/* if there is a floating selection, and this aint it... */
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if (gimage_floating_sel (gdisp->gimage) && !layer_is_floating_sel (layer))
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gdisplay_install_tool_cursor (gdisp, GDK_SB_DOWN_ARROW);
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else if (layer == gdisp->gimage->active_layer)
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gdisplay_install_tool_cursor (gdisp, GDK_FLEUR);
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else
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gdisplay_install_tool_cursor (gdisp, GDK_HAND2);
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}
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else
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gdisplay_install_tool_cursor (gdisp, GDK_TOP_LEFT_ARROW);
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}
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}
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static void
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move_tool_control (Tool *tool,
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int action,
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gpointer gdisp_ptr)
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{
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MoveTool *move;
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move = tool->private;
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switch (action)
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{
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case PAUSE :
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break;
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case RESUME :
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if (move->guide)
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gdisplay_draw_guide (gdisp_ptr, move->guide, TRUE);
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break;
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case HALT :
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break;
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}
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}
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static void
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move_create_gc (GDisplay *gdisp)
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{
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if (!move_gc)
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{
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GdkGCValues values;
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values.foreground.pixel = gdisplay_white_pixel (gdisp);
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values.function = GDK_INVERT;
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move_gc = gdk_gc_new_with_values (gdisp->canvas->window, &values, GDK_GC_FUNCTION);
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}
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}
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void
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move_tool_start_hguide (Tool *tool,
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void *data)
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{
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MoveTool *private;
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GDisplay *gdisp;
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gdisp = data;
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selection_pause (gdisp->select);
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tool->gdisp_ptr = gdisp;
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tool->scroll_lock = TRUE;
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private = tool->private;
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private->guide = gimage_add_hguide (gdisp->gimage);
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tool->state = ACTIVE;
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undo_push_guide (gdisp->gimage, private->guide);
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}
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void
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move_tool_start_vguide (Tool *tool,
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void *data)
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{
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MoveTool *private;
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GDisplay *gdisp;
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gdisp = data;
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selection_pause (gdisp->select);
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tool->gdisp_ptr = gdisp;
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tool->scroll_lock = TRUE;
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private = tool->private;
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private->guide = gimage_add_vguide (gdisp->gimage);
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tool->state = ACTIVE;
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undo_push_guide (gdisp->gimage, private->guide);
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}
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Tool *
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tools_new_move_tool ()
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{
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Tool * tool;
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MoveTool * private;
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if (! move_options)
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move_options = tools_register_no_options (MOVE, "Move Tool Options");
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tool = (Tool *) g_malloc (sizeof (Tool));
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private = (MoveTool *) g_malloc (sizeof (MoveTool));
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tool->type = MOVE;
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tool->state = INACTIVE;
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tool->scroll_lock = 0; /* Allow scrolling */
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tool->auto_snap_to = FALSE;
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tool->private = (void *) private;
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tool->button_press_func = move_tool_button_press;
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tool->button_release_func = move_tool_button_release;
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tool->motion_func = move_tool_motion;
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tool->arrow_keys_func = edit_sel_arrow_keys_func;
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tool->cursor_update_func = move_tool_cursor_update;
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tool->control_func = move_tool_control;
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private->layer = NULL;
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private->guide = NULL;
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return tool;
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}
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void
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tools_free_move_tool (Tool *tool)
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{
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MoveTool * move;
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move = (MoveTool *) tool->private;
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if (tool->gdisp_ptr)
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{
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if (move->guide)
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gdisplay_draw_guide (tool->gdisp_ptr, move->guide, FALSE);
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}
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g_free (move);
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}
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