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gimp/app/layer_select.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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include "gdk/gdkkeysyms.h"
#include "appenv.h"
#include "colormaps.h"
#include "errors.h"
#include "gdisplay.h"
#include "gimprc.h"
#include "interface.h"
#include "layer_select.h"
#include "layers_dialogP.h"
#define PREVIEW_EVENT_MASK GDK_EXPOSURE_MASK | GDK_ENTER_NOTIFY_MASK
typedef struct _LayerSelect LayerSelect;
struct _LayerSelect {
GtkWidget *shell;
GtkWidget *layer_preview;
GtkWidget *label;
GdkPixmap *layer_pixmap;
GtkWidget *preview;
GImage *gimage;
int current_layer;
int dirty;
int image_width, image_height;
double ratio;
};
/* layer widget function prototypes */
static void layer_select_advance (LayerSelect *, int);
static void layer_select_forward (LayerSelect *);
static void layer_select_backward (LayerSelect *);
static void layer_select_end (LayerSelect *, guint32);
static void layer_select_set_gimage (LayerSelect *, GImage *);
static void layer_select_set_layer (LayerSelect *);
static gint layer_select_events (GtkWidget *, GdkEvent *);
static gint preview_events (GtkWidget *, GdkEvent *);
static void preview_redraw (LayerSelect *);
/*
* Local variables
*/
LayerSelect *layer_select = NULL;
/**********************/
/* Public functions */
/**********************/
void
layer_select_init (GImage *gimage,
int dir,
guint32 time)
{
GtkWidget *frame1;
GtkWidget *frame2;
GtkWidget *hbox;
GtkWidget *alignment;
if (!layer_select)
{
layer_select = g_malloc (sizeof (LayerSelect));
layer_select->layer_pixmap = NULL;
layer_select->layer_preview = NULL;
layer_select->preview = NULL;
layer_select->image_width = layer_select->image_height = 0;
layer_select_set_gimage (layer_select, gimage);
layer_select_advance (layer_select, dir);
if (preview_size)
{
layer_select->preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (layer_select->preview), preview_size, preview_size);
}
/* The shell and main vbox */
layer_select->shell = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_title (GTK_WINDOW (layer_select->shell), "Layer Select");
gtk_window_position (GTK_WINDOW (layer_select->shell), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (layer_select->shell), "event",
(GtkSignalFunc) layer_select_events,
layer_select);
gtk_widget_set_events (layer_select->shell, (GDK_KEY_PRESS_MASK |
GDK_KEY_RELEASE_MASK |
GDK_BUTTON_PRESS_MASK));
frame1 = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame1), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (layer_select->shell), frame1);
frame2 = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame2), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (frame1), frame2);
hbox = gtk_hbox_new (FALSE, 1);
gtk_container_add (GTK_CONTAINER (frame2), hbox);
/* The preview */
alignment = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (hbox), alignment, FALSE, FALSE, 0);
gtk_widget_show (alignment);
layer_select->layer_preview = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (layer_select->layer_preview),
layer_select->image_width, layer_select->image_height);
gtk_widget_set_events (layer_select->layer_preview, PREVIEW_EVENT_MASK);
gtk_signal_connect (GTK_OBJECT (layer_select->layer_preview), "event",
(GtkSignalFunc) preview_events, layer_select);
gtk_object_set_user_data (GTK_OBJECT (layer_select->layer_preview), layer_select);
gtk_container_add (GTK_CONTAINER (alignment), layer_select->layer_preview);
gtk_widget_show (layer_select->layer_preview);
gtk_widget_show (alignment);
/* the layer name label */
layer_select->label = gtk_label_new ("Layer");
gtk_box_pack_start (GTK_BOX (hbox), layer_select->label, FALSE, FALSE, 2);
gtk_widget_show (layer_select->label);
gtk_widget_show (hbox);
gtk_widget_show (frame1);
gtk_widget_show (frame2);
gtk_widget_show (layer_select->shell);
}
else
{
layer_select_set_gimage (layer_select, gimage);
layer_select_advance (layer_select, dir);
if (! GTK_WIDGET_VISIBLE (layer_select->shell))
gtk_widget_show (layer_select->shell);
else
gtk_widget_draw (layer_select->layer_preview, NULL);
}
gdk_key_repeat_disable ();
gdk_keyboard_grab (layer_select->shell->window, FALSE, time);
}
void
layer_select_update_preview_size ()
{
if (layer_select != NULL)
{
gtk_preview_size (GTK_PREVIEW (layer_select->preview), preview_size, preview_size);
if (GTK_WIDGET_VISIBLE (layer_select->shell))
gtk_widget_draw (layer_select->layer_preview, NULL);
}
}
/***********************/
/* Private functions */
/***********************/
static void
layer_select_advance (LayerSelect *layer_select,
int dir)
{
int index;
int length;
int count;
link_ptr list;
link_ptr nth;
Layer *layer;
index = 0;
/* If there is a floating selection, allow no advancement */
if (gimage_floating_sel (layer_select->gimage))
return;
count = 0;
list = layer_select->gimage->layer_stack;
while (list)
{
layer = (Layer *) list->data;
if (layer->ID == layer_select->current_layer)
index = count;
count++;
list = next_item (list);
}
length = list_length (layer_select->gimage->layer_stack);
if (dir == 1)
index = (index == length - 1) ? 0 : (index + 1);
else
index = (index == 0) ? (length - 1) : (index - 1);
nth = nth_item (layer_select->gimage->layer_stack, index);
if (nth)
{
layer = (Layer *) nth->data;
layer_select->current_layer = layer->ID;
}
}
static void
layer_select_forward (LayerSelect *layer_select)
{
layer_select_advance (layer_select, 1);
layer_select->dirty = TRUE;
gtk_widget_draw (layer_select->layer_preview, NULL);
}
static void
layer_select_backward (LayerSelect *layer_select)
{
layer_select_advance (layer_select, -1);
layer_select->dirty = TRUE;
gtk_widget_draw (layer_select->layer_preview, NULL);
}
static void
layer_select_end (LayerSelect *layer_select,
guint32 time)
{
gdk_key_repeat_restore ();
gdk_keyboard_ungrab (time);
gtk_widget_hide (layer_select->shell);
/* only reset the active layer if a new layer was specified */
if (layer_select->current_layer != layer_select->gimage->active_layer)
{
gimage_set_active_layer (layer_select->gimage, layer_select->current_layer);
gdisplays_flush ();
}
}
static void
layer_select_set_gimage (LayerSelect *layer_select,
GImage *gimage)
{
int image_width, image_height;
layer_select->gimage = gimage;
layer_select->current_layer = gimage->active_layer;
layer_select->dirty = TRUE;
/* Get the image width and height variables, based on the gimage */
if (gimage->width > gimage->height)
layer_select->ratio = (double) preview_size / (double) gimage->width;
else
layer_select->ratio = (double) preview_size / (double) gimage->height;
image_width = (int) (layer_select->ratio * gimage->width);
image_height = (int) (layer_select->ratio * gimage->height);
if (layer_select->image_width != image_width ||
layer_select->image_height != image_height)
{
layer_select->image_width = image_width;
layer_select->image_height = image_height;
if (layer_select->layer_preview)
gtk_widget_set_usize (layer_select->layer_preview,
layer_select->image_width,
layer_select->image_height);
if (layer_select->layer_pixmap)
{
gdk_pixmap_destroy (layer_select->layer_pixmap);
layer_select->layer_pixmap = NULL;
}
}
}
static void
layer_select_set_layer (LayerSelect *layer_select)
{
Layer *layer;
if (! (layer = layer_get_ID (layer_select->current_layer)))
return;
/* Set the layer label */
gtk_label_set (GTK_LABEL (layer_select->label), layer->name);
}
static gint
layer_select_events (GtkWidget *widget,
GdkEvent *event)
{
GdkEventKey *kevent;
GdkEventButton *bevent;
switch (event->type)
{
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
layer_select_end (layer_select, bevent->time);
break;
case GDK_KEY_PRESS:
kevent = (GdkEventKey *) event;
switch (kevent->keyval)
{
case GDK_Tab:
if (kevent->state & GDK_MOD1_MASK)
layer_select_forward (layer_select);
else if (kevent->state & GDK_CONTROL_MASK)
layer_select_backward (layer_select);
break;
}
return TRUE;
break;
case GDK_KEY_RELEASE:
kevent = (GdkEventKey *) event;
switch (kevent->keyval)
{
case GDK_Alt_L: case GDK_Alt_R:
kevent->state &= ~GDK_MOD1_MASK;
break;
case GDK_Control_L: case GDK_Control_R:
kevent->state &= ~GDK_CONTROL_MASK;
break;
}
if (! (kevent->state & (GDK_MOD1_MASK | GDK_CONTROL_MASK)))
layer_select_end (layer_select, kevent->time);
return TRUE;
break;
default:
break;
}
return FALSE;
}
static gint
preview_events (GtkWidget *widget,
GdkEvent *event)
{
switch (event->type)
{
case GDK_EXPOSE:
if (layer_select->dirty)
{
/* If a preview exists, draw it */
if (preview_size)
preview_redraw (layer_select);
/* Change the layer name label */
layer_select_set_layer (layer_select);
layer_select->dirty = FALSE;
}
if (preview_size)
gdk_draw_pixmap (layer_select->layer_preview->window,
layer_select->layer_preview->style->black_gc,
layer_select->layer_pixmap,
0, 0, 0, 0,
layer_select->image_width,
layer_select->image_height);
break;
default:
break;
}
return FALSE;
}
static void
preview_redraw (LayerSelect *layer_select)
{
Layer * layer;
TempBuf * preview_buf;
int w, h;
int offx, offy;
if (! (layer = layer_get_ID (layer_select->current_layer)))
return;
if (! layer_select->layer_pixmap)
layer_select->layer_pixmap = gdk_pixmap_new (layer_select->layer_preview->window,
layer_select->image_width,
layer_select->image_height,
-1);
if (layer_is_floating_sel (layer))
render_fs_preview (layer_select->layer_preview, layer_select->layer_pixmap);
else
{
/* determine width and height */
w = (int) (layer_select->ratio * layer->width);
h = (int) (layer_select->ratio * layer->height);
offx = (int) (layer_select->ratio * layer->offset_x);
offy = (int) (layer_select->ratio * layer->offset_y);
preview_buf = layer_preview (layer, w, h);
preview_buf->x = offx;
preview_buf->y = offy;
render_preview (preview_buf,
layer_select->preview,
layer_select->image_width,
layer_select->image_height,
-1);
/* Set the layer pixmap */
gtk_preview_put (GTK_PREVIEW (layer_select->preview),
layer_select->layer_pixmap,
layer_select->layer_preview->style->black_gc,
0, 0, 0, 0, layer_select->image_width, layer_select->image_height);
/* make sure the image has been transfered completely to the pixmap before
* we use it again...
*/
gdk_flush ();
}
}
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