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-rw-r--r--app/widgets/gimppaletteview.c515
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diff --git a/app/widgets/gimppaletteview.c b/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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.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_can_focus (GTK_WIDGET (view), TRUE);
+
+ 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_is_drawable (widget))
+ return FALSE;
+
+ GTK_WIDGET_CLASS (parent_class)->expose_event (widget, eevent);
+
+ if (view->renderer->viewable && pal_view->selected)
+ {
+ GimpViewRendererPalette *renderer;
+ GtkAllocation allocation;
+ cairo_t *cr;
+ gint row, col;
+
+ renderer = GIMP_VIEW_RENDERER_PALETTE (view->renderer);
+
+ gtk_widget_get_allocation (widget, &allocation);
+
+ 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_translate (cr, allocation.x, allocation.y);
+
+ cairo_rectangle (cr,
+ col * renderer->cell_width + 0.5,
+ row * renderer->cell_height + 0.5,
+ renderer->cell_width,
+ renderer->cell_height);
+
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);
+ cairo_stroke_preserve (cr);
+
+ if (gimp_cairo_set_focus_line_pattern (cr, widget))
+ {
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
+ 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_get_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 TRUE;
+
+ if (bevent->type == GDK_BUTTON_PRESS)
+ g_signal_emit (view, view_signals[ENTRY_CLICKED], 0,
+ entry, bevent->state);
+
+ if (gdk_event_triggers_context_menu ((GdkEvent *) bevent))
+ {
+ if (entry != view->selected)
+ gimp_palette_view_select_entry (view, entry);
+
+ g_signal_emit (view, view_signals[ENTRY_CONTEXT], 0, entry);
+ }
+ else if (bevent->button == 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);
+ }
+ }
+
+ return TRUE;
+}
+
+static gboolean
+gimp_palette_view_key_press (GtkWidget *widget,
+ GdkEventKey *kevent)
+{
+ GimpPaletteView *view = GIMP_PALETTE_VIEW (widget);
+
+ if (view->selected &&
+ (kevent->keyval == GDK_KEY_space ||
+ kevent->keyval == GDK_KEY_KP_Space ||
+ kevent->keyval == GDK_KEY_Return ||
+ kevent->keyval == GDK_KEY_KP_Enter ||
+ kevent->keyval == GDK_KEY_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_get_can_focus (widget) &&
+ ! gtk_widget_has_focus (widget))
+ {
+ gtk_widget_grab_focus (widget);
+
+ if (! view->selected &&
+ palette && gimp_palette_get_n_colors (palette) > 0)
+ {
+ GimpPaletteEntry *entry = gimp_palette_get_entry (palette, 0);
+
+ gimp_palette_view_select_entry (view, entry);
+ }
+
+ 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 = gimp_palette_get_entry (palette, 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 functions */
+
+static GimpPaletteEntry *
+gimp_palette_view_find_entry (GimpPaletteView *view,
+ gint x,
+ gint y)
+{
+ GimpPalette *palette;
+ GimpViewRendererPalette *renderer;
+ GimpPaletteEntry *entry = NULL;
+ gint col, row;
+
+ palette = GIMP_PALETTE (GIMP_VIEW (view)->renderer->viewable);
+ renderer = GIMP_VIEW_RENDERER_PALETTE (GIMP_VIEW (view)->renderer);
+
+ if (! palette || ! gimp_palette_get_n_colors (palette))
+ return NULL;
+
+ col = x / renderer->cell_width;
+ row = y / renderer->cell_height;
+
+ if (col >= 0 && col < renderer->columns &&
+ row >= 0 && row < renderer->rows)
+ {
+ entry = gimp_palette_get_entry (palette,
+ 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);
+ GtkAllocation allocation;
+
+ renderer = GIMP_VIEW_RENDERER_PALETTE (GIMP_VIEW (view)->renderer);
+
+ gtk_widget_get_allocation (widget, &allocation);
+
+ row = entry->position / renderer->columns;
+ col = entry->position % renderer->columns;
+
+ gtk_widget_queue_draw_area (GTK_WIDGET (view),
+ allocation.x + col * renderer->cell_width,
+ 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 (gimp_palette_get_colors (palette), 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);
+}