Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 298 insertions, 0 deletions

diff --git a/app/display/gimpcanvas.c b/app/display/gimpcanvas.c
new file mode 100644
index 0000000..46b9ff5
--- /dev/null
+++ b/app/display/gimpcanvas.c
@@ -0,0 +1,298 @@
+/* GIMP - The GNU 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 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 "libgimpcolor/gimpcolor.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "display-types.h"
+
+#include "config/gimpdisplayconfig.h"
+
+#include "widgets/gimpwidgets-utils.h"
+
+#include "gimpcanvas.h"
+
+#include "gimp-intl.h"
+
+
+#define MAX_BATCH_SIZE 32000
+
+
+enum
+{
+  PROP_0,
+  PROP_CONFIG
+};
+
+
+/*  local function prototypes  */
+
+static void       gimp_canvas_set_property    (GObject         *object,
+                                               guint            property_id,
+                                               const GValue    *value,
+                                               GParamSpec      *pspec);
+static void       gimp_canvas_get_property    (GObject         *object,
+                                               guint            property_id,
+                                               GValue          *value,
+                                               GParamSpec      *pspec);
+
+static void       gimp_canvas_unrealize       (GtkWidget       *widget);
+static void       gimp_canvas_style_set       (GtkWidget       *widget,
+                                               GtkStyle        *prev_style);
+static gboolean   gimp_canvas_focus_in_event  (GtkWidget       *widget,
+                                               GdkEventFocus   *event);
+static gboolean   gimp_canvas_focus_out_event (GtkWidget       *widget,
+                                               GdkEventFocus   *event);
+static gboolean   gimp_canvas_focus           (GtkWidget       *widget,
+                                               GtkDirectionType direction);
+
+
+G_DEFINE_TYPE (GimpCanvas, gimp_canvas, GIMP_TYPE_OVERLAY_BOX)
+
+#define parent_class gimp_canvas_parent_class
+
+
+static void
+gimp_canvas_class_init (GimpCanvasClass *klass)
+{
+  GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->set_property    = gimp_canvas_set_property;
+  object_class->get_property    = gimp_canvas_get_property;
+
+  widget_class->unrealize       = gimp_canvas_unrealize;
+  widget_class->style_set       = gimp_canvas_style_set;
+  widget_class->focus_in_event  = gimp_canvas_focus_in_event;
+  widget_class->focus_out_event = gimp_canvas_focus_out_event;
+  widget_class->focus           = gimp_canvas_focus;
+
+  g_object_class_install_property (object_class, PROP_CONFIG,
+                                   g_param_spec_object ("config", NULL, NULL,
+                                                        GIMP_TYPE_DISPLAY_CONFIG,
+                                                        GIMP_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY));
+}
+
+static void
+gimp_canvas_init (GimpCanvas *canvas)
+{
+  GtkWidget *widget = GTK_WIDGET (canvas);
+
+  gtk_widget_set_can_focus (widget, TRUE);
+  gtk_widget_add_events (widget, GIMP_CANVAS_EVENT_MASK);
+  gtk_widget_set_extension_events (widget, GDK_EXTENSION_EVENTS_ALL);
+}
+
+static void
+gimp_canvas_set_property (GObject      *object,
+                          guint         property_id,
+                          const GValue *value,
+                          GParamSpec   *pspec)
+{
+  GimpCanvas *canvas = GIMP_CANVAS (object);
+
+  switch (property_id)
+    {
+    case PROP_CONFIG:
+      canvas->config = g_value_get_object (value); /* don't dup */
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_get_property (GObject    *object,
+                          guint       property_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
+{
+  GimpCanvas *canvas = GIMP_CANVAS (object);
+
+  switch (property_id)
+    {
+    case PROP_CONFIG:
+      g_value_set_object (value, canvas->config);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_canvas_unrealize (GtkWidget *widget)
+{
+  GimpCanvas *canvas = GIMP_CANVAS (widget);
+
+  g_clear_object (&canvas->layout);
+
+  GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
+}
+
+static void
+gimp_canvas_style_set (GtkWidget *widget,
+                       GtkStyle  *prev_style)
+{
+  GimpCanvas *canvas = GIMP_CANVAS (widget);
+
+  GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
+
+  g_clear_object (&canvas->layout);
+}
+
+static gboolean
+gimp_canvas_focus_in_event (GtkWidget     *widget,
+                            GdkEventFocus *event)
+{
+  /*  don't allow the default impl to invalidate the whole widget,
+   *  we don't draw a focus indicator anyway.
+   */
+  return FALSE;
+}
+
+static gboolean
+gimp_canvas_focus_out_event (GtkWidget     *widget,
+                             GdkEventFocus *event)
+{
+  /*  see focus-in-event
+   */
+  return FALSE;
+}
+
+static gboolean
+gimp_canvas_focus (GtkWidget        *widget,
+                   GtkDirectionType  direction)
+{
+  GtkWidget *focus = gtk_container_get_focus_child (GTK_CONTAINER (widget));
+
+  /* override GtkContainer's focus() implementation which would always
+   * give focus to the canvas because it is focussable. Instead, try
+   * navigating in the focused overlay child first, and use
+   * GtkContainer's default implementation only if that fails (which
+   * happens when focus navigation leaves the overlay child).
+   */
+
+  if (focus && gtk_widget_child_focus (focus, direction))
+    return TRUE;
+
+  return GTK_WIDGET_CLASS (parent_class)->focus (widget, direction);
+}
+
+
+/*  public functions  */
+
+/**
+ * gimp_canvas_new:
+ *
+ * Creates a new #GimpCanvas widget.
+ *
+ * The #GimpCanvas widget is a #GtkDrawingArea abstraction. It manages
+ * a set of graphic contexts for drawing on a GIMP display. If you
+ * draw using a #GimpCanvasStyle, #GimpCanvas makes sure that the
+ * associated #GdkGC is created. All drawing on the canvas needs to
+ * happen by means of the #GimpCanvas drawing functions. Besides from
+ * not needing a #GdkGC pointer, the #GimpCanvas drawing functions
+ * look and work like their #GdkDrawable counterparts. #GimpCanvas
+ * gracefully handles attempts to draw on the unrealized widget.
+ *
+ * Return value: a new #GimpCanvas widget
+ **/
+GtkWidget *
+gimp_canvas_new (GimpDisplayConfig *config)
+{
+  g_return_val_if_fail (GIMP_IS_DISPLAY_CONFIG (config), NULL);
+
+  return g_object_new (GIMP_TYPE_CANVAS,
+                       "name",   "gimp-canvas",
+                       "config", config,
+                       NULL);
+}
+
+/**
+ * gimp_canvas_get_layout:
+ * @canvas:  a #GimpCanvas widget
+ * @format:  a standard printf() format string.
+ * @Varargs: the parameters to insert into the format string.
+ *
+ * Returns a layout which can be used for
+ * pango_cairo_show_layout(). The layout belongs to the canvas and
+ * should not be freed, not should a pointer to it be kept around
+ * after drawing.
+ *
+ * Returns: a #PangoLayout owned by the canvas.
+ **/
+PangoLayout *
+gimp_canvas_get_layout (GimpCanvas  *canvas,
+                        const gchar *format,
+                        ...)
+{
+  va_list  args;
+  gchar   *text;
+
+  if (! canvas->layout)
+    canvas->layout = gtk_widget_create_pango_layout (GTK_WIDGET (canvas),
+                                                     NULL);
+
+  va_start (args, format);
+  text = g_strdup_vprintf (format, args);
+  va_end (args);
+
+  pango_layout_set_text (canvas->layout, text, -1);
+  g_free (text);
+
+  return canvas->layout;
+}
+
+/**
+ * gimp_canvas_set_bg_color:
+ * @canvas:   a #GimpCanvas widget
+ * @color:    a color in #GimpRGB format
+ *
+ * Sets the background color of the canvas's window.  This
+ * is the color the canvas is set to if it is cleared.
+ **/
+void
+gimp_canvas_set_bg_color (GimpCanvas *canvas,
+                          GimpRGB    *color)
+{
+  GtkWidget   *widget = GTK_WIDGET (canvas);
+  GdkColormap *colormap;
+  GdkColor     gdk_color;
+
+  if (! gtk_widget_get_realized (widget))
+    return;
+
+  gimp_rgb_get_gdk_color (color, &gdk_color);
+
+  colormap = gdk_drawable_get_colormap (gtk_widget_get_window (widget));
+  g_return_if_fail (colormap != NULL);
+  gdk_colormap_alloc_color (colormap, &gdk_color, FALSE, TRUE);
+
+  gdk_window_set_background (gtk_widget_get_window (widget), &gdk_color);
+
+  gtk_widget_queue_draw (GTK_WIDGET (canvas));
+}