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gimp/app/widgets/gimppaletteview.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimppaletteview.c
* Copyright (C) 2005 Michael Natterer <mitch@gimp.org>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "core/gimppalette.h"
#include "core/gimpmarshal.h"
#include "gimpdnd.h"
#include "gimppaletteview.h"
#include "gimpviewrendererpalette.h"
enum
{
ENTRY_CLICKED,
ENTRY_SELECTED,
ENTRY_ACTIVATED,
ENTRY_CONTEXT,
COLOR_DROPPED,
LAST_SIGNAL
};
static gboolean gimp_palette_view_expose (GtkWidget *widget,
GdkEventExpose *eevent);
static gboolean gimp_palette_view_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_palette_view_key_press (GtkWidget *widget,
GdkEventKey *kevent);
static gboolean gimp_palette_view_focus (GtkWidget *widget,
GtkDirectionType direction);
static void gimp_palette_view_set_viewable (GimpView *view,
GimpViewable *old_viewable,
GimpViewable *new_viewable);
static GimpPaletteEntry *
gimp_palette_view_find_entry (GimpPaletteView *view,
gint x,
gint y);
static void gimp_palette_view_expose_entry (GimpPaletteView *view,
GimpPaletteEntry *entry);
static void gimp_palette_view_invalidate (GimpPalette *palette,
GimpPaletteView *view);
static void gimp_palette_view_drag_color (GtkWidget *widget,
GimpRGB *color,
gpointer data);
static void gimp_palette_view_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data);
G_DEFINE_TYPE (GimpPaletteView, gimp_palette_view, GIMP_TYPE_VIEW)
#define parent_class gimp_palette_view_parent_class
static guint view_signals[LAST_SIGNAL] = { 0 };
static void
gimp_palette_view_class_init (GimpPaletteViewClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GimpViewClass *view_class = GIMP_VIEW_CLASS (klass);
view_signals[ENTRY_CLICKED] =
g_signal_new ("entry-clicked",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpPaletteViewClass, entry_clicked),
NULL, NULL,
gimp_marshal_VOID__POINTER_ENUM,
G_TYPE_NONE, 2,
G_TYPE_POINTER,
GDK_TYPE_MODIFIER_TYPE);
view_signals[ENTRY_SELECTED] =
g_signal_new ("entry-selected",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpPaletteViewClass, entry_selected),
NULL, NULL,
gimp_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
view_signals[ENTRY_ACTIVATED] =
g_signal_new ("entry-activated",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpPaletteViewClass, entry_activated),
NULL, NULL,
gimp_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
view_signals[ENTRY_CONTEXT] =
g_signal_new ("entry-context",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpPaletteViewClass, entry_context),
NULL, NULL,
gimp_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
view_signals[COLOR_DROPPED] =
g_signal_new ("color-dropped",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpPaletteViewClass, color_dropped),
NULL, NULL,
gimp_marshal_VOID__POINTER_BOXED,
G_TYPE_NONE, 2,
G_TYPE_POINTER,
GIMP_TYPE_RGB);
widget_class->expose_event = gimp_palette_view_expose;
widget_class->button_press_event = gimp_palette_view_button_press;
widget_class->key_press_event = gimp_palette_view_key_press;
widget_class->focus = gimp_palette_view_focus;
view_class->set_viewable = gimp_palette_view_set_viewable;
}
static void
gimp_palette_view_init (GimpPaletteView *view)
{
GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
view->selected = NULL;
view->dnd_entry = NULL;
}
static gboolean
gimp_palette_view_expose (GtkWidget *widget,
GdkEventExpose *eevent)
{
GimpPaletteView *pal_view = GIMP_PALETTE_VIEW (widget);
GimpView *view = GIMP_VIEW (widget);
if (! GTK_WIDGET_DRAWABLE (widget))
return FALSE;
GTK_WIDGET_CLASS (parent_class)->expose_event (widget, eevent);
if (view->renderer->viewable && pal_view->selected)
{
GimpViewRendererPalette *renderer;
GtkStyle *style = gtk_widget_get_style (widget);
cairo_t *cr;
gint row, col;
renderer = GIMP_VIEW_RENDERER_PALETTE (view->renderer);
row = pal_view->selected->position / renderer->columns;
col = pal_view->selected->position % renderer->columns;
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdk_cairo_region (cr, eevent->region);
cairo_clip (cr);
cairo_rectangle (cr,
widget->allocation.x + col * renderer->cell_width + 0.5,
widget->allocation.y + row * renderer->cell_height + 0.5,
renderer->cell_width,
renderer->cell_height);
cairo_set_line_width (cr, 1.0);
gdk_cairo_set_source_color (cr, &style->fg[GTK_STATE_SELECTED]);
cairo_stroke_preserve (cr);
if (gimp_cairo_set_focus_line_pattern (cr, widget))
{
gdk_cairo_set_source_color (cr, &style->fg[GTK_STATE_NORMAL]);
cairo_stroke (cr);
}
cairo_destroy (cr);
}
return FALSE;
}
static gboolean
gimp_palette_view_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpPaletteView *view = GIMP_PALETTE_VIEW (widget);
GimpPaletteEntry *entry;
if (GTK_WIDGET_CAN_FOCUS (widget) && ! GTK_WIDGET_HAS_FOCUS (widget))
gtk_widget_grab_focus (widget);
entry = gimp_palette_view_find_entry (view, bevent->x, bevent->y);
view->dnd_entry = entry;
if (! entry || bevent->button == 2)
return FALSE;
if (bevent->type == GDK_BUTTON_PRESS)
g_signal_emit (view, view_signals[ENTRY_CLICKED], 0,
entry, bevent->state);
switch (bevent->button)
{
case 1:
if (bevent->type == GDK_BUTTON_PRESS)
{
gimp_palette_view_select_entry (view, entry);
}
else if (bevent->type == GDK_2BUTTON_PRESS && entry == view->selected)
{
g_signal_emit (view, view_signals[ENTRY_ACTIVATED], 0, entry);
}
break;
case 3:
if (bevent->type == GDK_BUTTON_PRESS)
{
if (entry != view->selected)
gimp_palette_view_select_entry (view, entry);
g_signal_emit (view, view_signals[ENTRY_CONTEXT], 0, entry);
}
break;
default:
break;
}
return FALSE;
}
static gboolean
gimp_palette_view_key_press (GtkWidget *widget,
GdkEventKey *kevent)
{
GimpPaletteView *view = GIMP_PALETTE_VIEW (widget);
if (view->selected &&
(kevent->keyval == GDK_space ||
kevent->keyval == GDK_KP_Space ||
kevent->keyval == GDK_Return ||
kevent->keyval == GDK_KP_Enter ||
kevent->keyval == GDK_ISO_Enter))
{
g_signal_emit (view, view_signals[ENTRY_CLICKED], 0,
view->selected, kevent->state);
}
return FALSE;
}
static gboolean
gimp_palette_view_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GimpPaletteView *view = GIMP_PALETTE_VIEW (widget);
GimpPalette *palette;
palette = GIMP_PALETTE (GIMP_VIEW (view)->renderer->viewable);
if (GTK_WIDGET_CAN_FOCUS (widget) && ! GTK_WIDGET_HAS_FOCUS (widget))
{
gtk_widget_grab_focus (widget);
if (! view->selected && palette->colors)
gimp_palette_view_select_entry (view, palette->colors->data);
return TRUE;
}
if (view->selected)
{
GimpViewRendererPalette *renderer;
gint skip = 0;
renderer = GIMP_VIEW_RENDERER_PALETTE (GIMP_VIEW (view)->renderer);
switch (direction)
{
case GTK_DIR_UP:
skip = -renderer->columns;
break;
case GTK_DIR_DOWN:
skip = renderer->columns;
break;
case GTK_DIR_LEFT:
skip = -1;
break;
case GTK_DIR_RIGHT:
skip = 1;
break;
case GTK_DIR_TAB_FORWARD:
case GTK_DIR_TAB_BACKWARD:
return FALSE;
}
if (skip != 0)
{
GimpPaletteEntry *entry;
gint position;
position = view->selected->position + skip;
entry = g_list_nth_data (palette->colors, position);
if (entry)
gimp_palette_view_select_entry (view, entry);
}
return TRUE;
}
return FALSE;
}
static void
gimp_palette_view_set_viewable (GimpView *view,
GimpViewable *old_viewable,
GimpViewable *new_viewable)
{
GimpPaletteView *pal_view = GIMP_PALETTE_VIEW (view);
pal_view->dnd_entry = NULL;
gimp_palette_view_select_entry (pal_view, NULL);
if (old_viewable)
{
g_signal_handlers_disconnect_by_func (old_viewable,
gimp_palette_view_invalidate,
view);
if (! new_viewable)
{
gimp_dnd_color_source_remove (GTK_WIDGET (view));
gimp_dnd_color_dest_remove (GTK_WIDGET (view));
}
}
GIMP_VIEW_CLASS (parent_class)->set_viewable (view,
old_viewable, new_viewable);
if (new_viewable)
{
g_signal_connect (new_viewable, "invalidate-preview",
G_CALLBACK (gimp_palette_view_invalidate),
view);
/* unset the palette drag handler set by GimpView */
gimp_dnd_viewable_source_remove (GTK_WIDGET (view), GIMP_TYPE_PALETTE);
if (! old_viewable)
{
gimp_dnd_color_source_add (GTK_WIDGET (view),
gimp_palette_view_drag_color,
view);
gimp_dnd_color_dest_add (GTK_WIDGET (view),
gimp_palette_view_drop_color,
view);
}
}
}
/* public functions */
void
gimp_palette_view_select_entry (GimpPaletteView *view,
GimpPaletteEntry *entry)
{
g_return_if_fail (GIMP_IS_PALETTE_VIEW (view));
if (entry == view->selected)
return;
if (view->selected)
gimp_palette_view_expose_entry (view, view->selected);
view->selected = entry;
if (view->selected)
gimp_palette_view_expose_entry (view, view->selected);
g_signal_emit (view, view_signals[ENTRY_SELECTED], 0, view->selected);
}
/* private funcions */
static GimpPaletteEntry *
gimp_palette_view_find_entry (GimpPaletteView *view,
gint x,
gint y)
{
GimpViewRendererPalette *renderer;
GimpPaletteEntry *entry = NULL;
gint col, row;
renderer = GIMP_VIEW_RENDERER_PALETTE (GIMP_VIEW (view)->renderer);
col = x / renderer->cell_width;
row = y / renderer->cell_height;
if (col >= 0 && col < renderer->columns &&
row >= 0 && row < renderer->rows)
{
GimpPalette *palette;
palette = GIMP_PALETTE (GIMP_VIEW (view)->renderer->viewable);
entry = g_list_nth_data (palette->colors,
row * renderer->columns + col);
}
return entry;
}
static void
gimp_palette_view_expose_entry (GimpPaletteView *view,
GimpPaletteEntry *entry)
{
GimpViewRendererPalette *renderer;
gint row, col;
GtkWidget *widget = GTK_WIDGET (view);
renderer = GIMP_VIEW_RENDERER_PALETTE (GIMP_VIEW (view)->renderer);
row = entry->position / renderer->columns;
col = entry->position % renderer->columns;
gtk_widget_queue_draw_area (GTK_WIDGET (view),
widget->allocation.x + col * renderer->cell_width,
widget->allocation.y + row * renderer->cell_height,
renderer->cell_width + 1,
renderer->cell_height + 1);
}
static void
gimp_palette_view_invalidate (GimpPalette *palette,
GimpPaletteView *view)
{
view->dnd_entry = NULL;
if (view->selected && ! g_list_find (palette->colors, view->selected))
gimp_palette_view_select_entry (view, NULL);
}
static void
gimp_palette_view_drag_color (GtkWidget *widget,
GimpRGB *color,
gpointer data)
{
GimpPaletteView *view = GIMP_PALETTE_VIEW (data);
if (view->dnd_entry)
*color = view->dnd_entry->color;
else
gimp_rgba_set (color, 0.0, 0.0, 0.0, 1.0);
}
static void
gimp_palette_view_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data)
{
GimpPaletteView *view = GIMP_PALETTE_VIEW (data);
GimpPaletteEntry *entry;
entry = gimp_palette_view_find_entry (view, x, y);
g_signal_emit (view, view_signals[COLOR_DROPPED], 0,
entry, color);
}
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