546 lines
17 KiB
C
546 lines
17 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikapaletteview.c
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* Copyright (C) 2005 Michael Natterer <mitch@gimp.org>
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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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include "libpikacolor/pikacolor.h"
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#include "libpikawidgets/pikawidgets.h"
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#include "widgets-types.h"
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#include "core/pikapalette.h"
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#include "core/pikamarshal.h"
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#include "pikadnd.h"
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#include "pikapaletteview.h"
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#include "pikaviewrendererpalette.h"
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enum
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{
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ENTRY_CLICKED,
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ENTRY_SELECTED,
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ENTRY_ACTIVATED,
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COLOR_DROPPED,
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LAST_SIGNAL
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};
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static gboolean pika_palette_view_draw (GtkWidget *widget,
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cairo_t *cr);
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static gboolean pika_palette_view_button_press (GtkWidget *widget,
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GdkEventButton *bevent);
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static gboolean pika_palette_view_key_press (GtkWidget *widget,
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GdkEventKey *kevent);
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static gboolean pika_palette_view_focus (GtkWidget *widget,
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GtkDirectionType direction);
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static void pika_palette_view_set_viewable (PikaView *view,
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PikaViewable *old_viewable,
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PikaViewable *new_viewable);
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static PikaPaletteEntry *
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pika_palette_view_find_entry (PikaPaletteView *view,
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gint x,
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gint y);
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static void pika_palette_view_expose_entry (PikaPaletteView *view,
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PikaPaletteEntry *entry);
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static void pika_palette_view_invalidate (PikaPalette *palette,
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PikaPaletteView *view);
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static void pika_palette_view_drag_color (GtkWidget *widget,
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PikaRGB *color,
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gpointer data);
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static void pika_palette_view_drop_color (GtkWidget *widget,
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gint x,
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gint y,
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const PikaRGB *color,
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gpointer data);
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G_DEFINE_TYPE (PikaPaletteView, pika_palette_view, PIKA_TYPE_VIEW)
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#define parent_class pika_palette_view_parent_class
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static guint view_signals[LAST_SIGNAL] = { 0 };
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static void
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pika_palette_view_class_init (PikaPaletteViewClass *klass)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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PikaViewClass *view_class = PIKA_VIEW_CLASS (klass);
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view_signals[ENTRY_CLICKED] =
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g_signal_new ("entry-clicked",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaPaletteViewClass, entry_clicked),
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NULL, NULL,
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pika_marshal_VOID__POINTER_ENUM,
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G_TYPE_NONE, 2,
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G_TYPE_POINTER,
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GDK_TYPE_MODIFIER_TYPE);
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view_signals[ENTRY_SELECTED] =
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g_signal_new ("entry-selected",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaPaletteViewClass, entry_selected),
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NULL, NULL, NULL,
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G_TYPE_NONE, 1,
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G_TYPE_POINTER);
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view_signals[ENTRY_ACTIVATED] =
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g_signal_new ("entry-activated",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaPaletteViewClass, entry_activated),
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NULL, NULL, NULL,
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G_TYPE_NONE, 1,
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G_TYPE_POINTER);
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view_signals[COLOR_DROPPED] =
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g_signal_new ("color-dropped",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaPaletteViewClass, color_dropped),
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NULL, NULL,
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pika_marshal_VOID__POINTER_BOXED,
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G_TYPE_NONE, 2,
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G_TYPE_POINTER,
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PIKA_TYPE_RGB);
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widget_class->draw = pika_palette_view_draw;
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widget_class->button_press_event = pika_palette_view_button_press;
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widget_class->key_press_event = pika_palette_view_key_press;
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widget_class->focus = pika_palette_view_focus;
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view_class->set_viewable = pika_palette_view_set_viewable;
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}
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static void
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pika_palette_view_init (PikaPaletteView *view)
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{
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gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
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view->selected = NULL;
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view->dnd_entry = NULL;
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}
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static gboolean
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pika_palette_view_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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PikaPaletteView *pal_view = PIKA_PALETTE_VIEW (widget);
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PikaView *view = PIKA_VIEW (widget);
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PikaPalette *palette;
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palette = PIKA_PALETTE (PIKA_VIEW (view)->renderer->viewable);
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cairo_save (cr);
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GTK_WIDGET_CLASS (parent_class)->draw (widget, cr);
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cairo_restore (cr);
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if (view->renderer->viewable && pal_view->selected)
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{
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PikaViewRendererPalette *renderer;
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GtkAllocation allocation;
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gint pos, row, col;
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renderer = PIKA_VIEW_RENDERER_PALETTE (view->renderer);
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gtk_widget_get_allocation (widget, &allocation);
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pos = pika_palette_get_entry_position (palette, pal_view->selected);
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row = pos / renderer->columns;
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col = pos % renderer->columns;
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cairo_rectangle (cr,
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col * renderer->cell_width + 0.5,
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row * renderer->cell_height + 0.5,
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renderer->cell_width,
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renderer->cell_height);
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cairo_set_line_width (cr, 1.0);
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cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);
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cairo_stroke_preserve (cr);
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if (pika_cairo_set_focus_line_pattern (cr, widget))
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{
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cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
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cairo_stroke (cr);
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}
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}
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return FALSE;
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}
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static gboolean
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pika_palette_view_button_press (GtkWidget *widget,
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GdkEventButton *bevent)
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{
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PikaPaletteView *view = PIKA_PALETTE_VIEW (widget);
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PikaPaletteEntry *entry;
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if (gtk_widget_get_can_focus (widget) && ! gtk_widget_has_focus (widget))
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gtk_widget_grab_focus (widget);
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entry = pika_palette_view_find_entry (view, bevent->x, bevent->y);
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view->dnd_entry = entry;
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if (! entry || bevent->button == 2)
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return TRUE;
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if (bevent->type == GDK_BUTTON_PRESS)
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g_signal_emit (view, view_signals[ENTRY_CLICKED], 0,
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entry, bevent->state);
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if (gdk_event_triggers_context_menu ((GdkEvent *) bevent))
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{
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if (entry != view->selected)
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pika_palette_view_select_entry (view, entry);
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/* Usually the menu is provided by a PikaEditor.
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* Make sure it's also run by returning FALSE here */
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return FALSE;
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}
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else if (bevent->button == 1)
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{
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if (bevent->type == GDK_BUTTON_PRESS)
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{
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pika_palette_view_select_entry (view, entry);
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}
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else if (bevent->type == GDK_2BUTTON_PRESS && entry == view->selected)
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{
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g_signal_emit (view, view_signals[ENTRY_ACTIVATED], 0, entry);
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}
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}
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return TRUE;
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}
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static gboolean
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pika_palette_view_key_press (GtkWidget *widget,
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GdkEventKey *kevent)
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{
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PikaPaletteView *view = PIKA_PALETTE_VIEW (widget);
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if (view->selected &&
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(kevent->keyval == GDK_KEY_space ||
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kevent->keyval == GDK_KEY_KP_Space ||
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kevent->keyval == GDK_KEY_Return ||
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kevent->keyval == GDK_KEY_KP_Enter ||
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kevent->keyval == GDK_KEY_ISO_Enter))
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{
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g_signal_emit (view, view_signals[ENTRY_CLICKED], 0,
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view->selected, kevent->state);
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}
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return FALSE;
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}
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static gboolean
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pika_palette_view_focus (GtkWidget *widget,
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GtkDirectionType direction)
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{
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PikaPaletteView *view = PIKA_PALETTE_VIEW (widget);
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PikaPalette *palette;
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palette = PIKA_PALETTE (PIKA_VIEW (view)->renderer->viewable);
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if (gtk_widget_get_can_focus (widget) &&
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! gtk_widget_has_focus (widget))
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{
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gtk_widget_grab_focus (widget);
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if (! view->selected &&
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palette && pika_palette_get_n_colors (palette) > 0)
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{
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PikaPaletteEntry *entry = pika_palette_get_entry (palette, 0);
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pika_palette_view_select_entry (view, entry);
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}
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return TRUE;
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}
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if (view->selected)
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{
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PikaViewRendererPalette *renderer;
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gint skip = 0;
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renderer = PIKA_VIEW_RENDERER_PALETTE (PIKA_VIEW (view)->renderer);
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switch (direction)
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{
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case GTK_DIR_UP:
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skip = -renderer->columns;
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break;
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case GTK_DIR_DOWN:
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skip = renderer->columns;
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break;
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case GTK_DIR_LEFT:
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skip = -1;
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break;
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case GTK_DIR_RIGHT:
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skip = 1;
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break;
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case GTK_DIR_TAB_FORWARD:
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case GTK_DIR_TAB_BACKWARD:
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return FALSE;
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}
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if (skip != 0)
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{
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PikaPaletteEntry *entry;
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PikaPalette *palette;
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gint position;
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palette = PIKA_PALETTE (PIKA_VIEW (view)->renderer->viewable);
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position = pika_palette_get_entry_position (palette, view->selected);
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position += skip;
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entry = pika_palette_get_entry (palette, position);
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if (entry)
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pika_palette_view_select_entry (view, entry);
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}
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return TRUE;
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}
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return FALSE;
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}
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static void
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pika_palette_view_set_viewable (PikaView *view,
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PikaViewable *old_viewable,
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PikaViewable *new_viewable)
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{
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PikaPaletteView *pal_view = PIKA_PALETTE_VIEW (view);
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pal_view->dnd_entry = NULL;
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pika_palette_view_select_entry (pal_view, NULL);
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if (old_viewable)
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{
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g_signal_handlers_disconnect_by_func (old_viewable,
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pika_palette_view_invalidate,
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view);
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if (! new_viewable)
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{
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pika_dnd_color_source_remove (GTK_WIDGET (view));
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pika_dnd_color_dest_remove (GTK_WIDGET (view));
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}
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}
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PIKA_VIEW_CLASS (parent_class)->set_viewable (view,
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old_viewable, new_viewable);
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if (new_viewable)
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{
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g_signal_connect (new_viewable, "invalidate-preview",
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G_CALLBACK (pika_palette_view_invalidate),
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view);
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/* unset the palette drag handler set by PikaView */
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pika_dnd_viewable_source_remove (GTK_WIDGET (view), PIKA_TYPE_PALETTE);
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if (! old_viewable)
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{
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pika_dnd_color_source_add (GTK_WIDGET (view),
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pika_palette_view_drag_color,
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view);
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pika_dnd_color_dest_add (GTK_WIDGET (view),
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pika_palette_view_drop_color,
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view);
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}
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}
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}
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/* public functions */
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void
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pika_palette_view_select_entry (PikaPaletteView *view,
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PikaPaletteEntry *entry)
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{
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g_return_if_fail (PIKA_IS_PALETTE_VIEW (view));
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if (entry == view->selected)
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return;
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if (view->selected)
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pika_palette_view_expose_entry (view, view->selected);
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view->selected = entry;
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if (view->selected)
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pika_palette_view_expose_entry (view, view->selected);
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g_signal_emit (view, view_signals[ENTRY_SELECTED], 0, view->selected);
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}
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PikaPaletteEntry *
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pika_palette_view_get_selected_entry (PikaPaletteView *view)
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{
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g_return_val_if_fail (PIKA_IS_PALETTE_VIEW (view), NULL);
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return view->selected;
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}
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void
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pika_palette_view_get_entry_rect (PikaPaletteView *view,
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PikaPaletteEntry *entry,
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GdkRectangle *rect)
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{
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PikaViewRendererPalette *renderer;
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PikaPalette *palette;
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GtkAllocation allocation;
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gint pos, row, col;
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g_return_if_fail (PIKA_IS_PALETTE_VIEW (view));
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g_return_if_fail (entry);
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g_return_if_fail (rect);
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gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
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renderer = PIKA_VIEW_RENDERER_PALETTE (PIKA_VIEW (view)->renderer);
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palette = PIKA_PALETTE (PIKA_VIEW_RENDERER (renderer)->viewable);
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pos = pika_palette_get_entry_position (palette, entry);
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row = pos / renderer->columns;
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col = pos % renderer->columns;
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rect->x = allocation.x + col * renderer->cell_width;
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rect->y = allocation.y + row * renderer->cell_height;
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rect->width = renderer->cell_width;
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rect->height = renderer->cell_height;
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}
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/* private functions */
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static PikaPaletteEntry *
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pika_palette_view_find_entry (PikaPaletteView *view,
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gint x,
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gint y)
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{
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PikaPalette *palette;
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PikaViewRendererPalette *renderer;
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PikaPaletteEntry *entry = NULL;
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gint col, row;
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renderer = PIKA_VIEW_RENDERER_PALETTE (PIKA_VIEW (view)->renderer);
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palette = PIKA_PALETTE (PIKA_VIEW_RENDERER (renderer)->viewable);
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if (! palette || ! pika_palette_get_n_colors (palette))
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return NULL;
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col = x / renderer->cell_width;
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row = y / renderer->cell_height;
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if (col >= 0 && col < renderer->columns &&
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row >= 0 && row < renderer->rows)
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{
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entry = pika_palette_get_entry (palette,
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row * renderer->columns + col);
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}
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return entry;
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}
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static void
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pika_palette_view_expose_entry (PikaPaletteView *view,
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PikaPaletteEntry *entry)
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{
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PikaViewRendererPalette *renderer;
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gint pos, row, col;
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GtkWidget *widget = GTK_WIDGET (view);
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GtkAllocation allocation;
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PikaPalette *palette;
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renderer = PIKA_VIEW_RENDERER_PALETTE (PIKA_VIEW (view)->renderer);
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palette = PIKA_PALETTE (PIKA_VIEW_RENDERER (renderer)->viewable);
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gtk_widget_get_allocation (widget, &allocation);
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pos = pika_palette_get_entry_position (palette, entry);
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row = pos / renderer->columns;
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col = pos % renderer->columns;
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gtk_widget_queue_draw_area (GTK_WIDGET (view),
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allocation.x + col * renderer->cell_width,
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allocation.y + row * renderer->cell_height,
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renderer->cell_width + 1,
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renderer->cell_height + 1);
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}
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static void
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pika_palette_view_invalidate (PikaPalette *palette,
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PikaPaletteView *view)
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{
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view->dnd_entry = NULL;
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if (view->selected &&
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! g_list_find (pika_palette_get_colors (palette), view->selected))
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{
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pika_palette_view_select_entry (view, NULL);
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}
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}
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static void
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pika_palette_view_drag_color (GtkWidget *widget,
|
|
PikaRGB *color,
|
|
gpointer data)
|
|
{
|
|
PikaPaletteView *view = PIKA_PALETTE_VIEW (data);
|
|
|
|
if (view->dnd_entry)
|
|
*color = view->dnd_entry->color;
|
|
else
|
|
pika_rgba_set (color, 0.0, 0.0, 0.0, 1.0);
|
|
}
|
|
|
|
static void
|
|
pika_palette_view_drop_color (GtkWidget *widget,
|
|
gint x,
|
|
gint y,
|
|
const PikaRGB *color,
|
|
gpointer data)
|
|
{
|
|
PikaPaletteView *view = PIKA_PALETTE_VIEW (data);
|
|
PikaPaletteEntry *entry;
|
|
|
|
entry = pika_palette_view_find_entry (view, x, y);
|
|
|
|
g_signal_emit (view, view_signals[COLOR_DROPPED], 0,
|
|
entry, color);
|
|
}
|
