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-rw-r--r--gladeui/glade-placeholder.c254
1 files changed, 178 insertions, 76 deletions
diff --git a/gladeui/glade-placeholder.c b/gladeui/glade-placeholder.c
index f90e92a5..ec5361b5 100644
--- a/gladeui/glade-placeholder.c
+++ b/gladeui/glade-placeholder.c
@@ -47,37 +47,12 @@
#include "glade-app.h"
#include <math.h>
+#include "glade-dnd.h"
+#include "glade-drag.h"
+
#define WIDTH_REQUISITION 20
#define HEIGHT_REQUISITION 20
-static void glade_placeholder_finalize (GObject *object);
-static void glade_placeholder_set_property (GObject *object,
- guint prop_id,
- const GValue *value,
- GParamSpec *pspec);
-static void glade_placeholder_get_property (GObject *object,
- guint prop_id,
- GValue *value,
- GParamSpec *pspec);
-static void glade_placeholder_realize (GtkWidget *widget);
-static void glade_placeholder_unrealize (GtkWidget *widget);
-static void glade_placeholder_map (GtkWidget *widget);
-static void glade_placeholder_unmap (GtkWidget *widget);
-
-static void glade_placeholder_size_allocate (GtkWidget *widget,
- GtkAllocation *allocation);
-
-static gboolean glade_placeholder_draw (GtkWidget *widget, cairo_t *cr);
-
-static gboolean glade_placeholder_motion_notify_event (GtkWidget *widget,
- GdkEventMotion *event);
-
-static gboolean glade_placeholder_button_press (GtkWidget *widget,
- GdkEventButton *event);
-
-static gboolean glade_placeholder_popup_menu (GtkWidget *widget);
-
-
static cairo_pattern_t *placeholder_pattern = NULL;
struct _GladePlaceholderPrivate
@@ -85,6 +60,8 @@ struct _GladePlaceholderPrivate
GList *packing_actions;
GdkWindow *event_window;
+
+ gboolean drag_highlight;
};
enum
@@ -99,56 +76,14 @@ enum
#define GLADE_PLACEHOLDER_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), \
GLADE_TYPE_PLACEHOLDER, \
GladePlaceholderPrivate))
+#define GLADE_PLACEHOLDER_PRIVATE(object) (((GladePlaceholder*)object)->priv)
-G_DEFINE_TYPE_WITH_CODE (GladePlaceholder, glade_placeholder, GTK_TYPE_WIDGET,
- G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
-
-static void glade_placeholder_class_init (GladePlaceholderClass *klass)
-{
- GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
- GObjectClass *object_class = G_OBJECT_CLASS (klass);
- gchar *path;
- cairo_surface_t *surface;
-
- object_class->finalize = glade_placeholder_finalize;
- object_class->set_property = glade_placeholder_set_property;
- object_class->get_property = glade_placeholder_get_property;
-
- widget_class->realize = glade_placeholder_realize;
- widget_class->unrealize = glade_placeholder_unrealize;
- widget_class->map = glade_placeholder_map;
- widget_class->unmap = glade_placeholder_unmap;
- widget_class->size_allocate = glade_placeholder_size_allocate;
- widget_class->draw = glade_placeholder_draw;
- widget_class->motion_notify_event = glade_placeholder_motion_notify_event;
- widget_class->button_press_event = glade_placeholder_button_press;
- widget_class->popup_menu = glade_placeholder_popup_menu;
-
- /* GtkScrollable implementation */
- g_object_class_override_property (object_class, PROP_HADJUSTMENT,
- "hadjustment");
- g_object_class_override_property (object_class, PROP_VADJUSTMENT,
- "vadjustment");
- g_object_class_override_property (object_class, PROP_HSCROLL_POLICY,
- "hscroll-policy");
- g_object_class_override_property (object_class, PROP_VSCROLL_POLICY,
- "vscroll-policy");
-
- /* Create our tiled background pattern */
- path = g_build_filename (glade_app_get_pixmaps_dir (), "placeholder.png", NULL);
- surface = cairo_image_surface_create_from_png (path);
-
- if (!surface)
- g_warning ("Failed to create surface for %s\n", path);
- else
- {
- placeholder_pattern = cairo_pattern_create_for_surface (surface);
- cairo_pattern_set_extend (placeholder_pattern, CAIRO_EXTEND_REPEAT);
- }
- g_free (path);
+static void glade_placeholder_drag_init (GladeDragInterface *iface);
- g_type_class_add_private (klass, sizeof (GladePlaceholderPrivate));
-}
+G_DEFINE_TYPE_WITH_CODE (GladePlaceholder, glade_placeholder, GTK_TYPE_WIDGET,
+ G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL)
+ G_IMPLEMENT_INTERFACE (GLADE_TYPE_DRAG,
+ glade_placeholder_drag_init))
static void
glade_placeholder_notify_parent (GObject *gobject,
@@ -188,6 +123,8 @@ glade_placeholder_init (GladePlaceholder *placeholder)
gtk_widget_set_size_request (GTK_WIDGET (placeholder),
WIDTH_REQUISITION, HEIGHT_REQUISITION);
+ _glade_dnd_dest_set (GTK_WIDGET (placeholder));
+
g_signal_connect (placeholder, "notify::parent",
G_CALLBACK (glade_placeholder_notify_parent), NULL);
@@ -360,6 +297,7 @@ glade_placeholder_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
static gboolean
glade_placeholder_draw (GtkWidget *widget, cairo_t *cr)
{
+ GladePlaceholder *placeholder = GLADE_PLACEHOLDER (widget);
gint h = gtk_widget_get_allocated_height (widget) - 1;
gint w = gtk_widget_get_allocated_width (widget) - 1;
@@ -388,6 +326,32 @@ glade_placeholder_draw (GtkWidget *widget, cairo_t *cr)
cairo_line_to (cr, 0, h);
cairo_stroke (cr);
+ if (placeholder->priv->drag_highlight)
+ {
+ cairo_pattern_t *gradient;
+ GtkStyleContext *context;
+ gdouble ww, hh;
+ GdkRGBA c;
+
+ context = gtk_widget_get_style_context (widget);
+ gtk_style_context_get_background_color (context, GTK_STATE_FLAG_SELECTED |
+ GTK_STATE_FLAG_FOCUSED, &c);
+
+ ww = w/2.0;
+ hh = h/2.0;
+ gradient = cairo_pattern_create_radial (ww, hh, MIN (w, h)/6,
+ ww, hh, MAX (ww, hh));
+ cairo_pattern_add_color_stop_rgba (gradient, 0, c.red, c.green, c.blue, .08);
+ cairo_pattern_add_color_stop_rgba (gradient, 1, c.red, c.green, c.blue, .28);
+
+ cairo_set_source (cr, gradient);
+
+ cairo_rectangle (cr, 0, 0, w, h);
+ cairo_fill (cr);
+
+ cairo_pattern_destroy (gradient);
+ }
+
return FALSE;
}
@@ -469,6 +433,144 @@ glade_placeholder_popup_menu (GtkWidget *widget)
return TRUE;
}
+static gboolean
+glade_placeholder_drag_can_drag (GladeDrag *source)
+{
+ GladeWidget *parent = glade_placeholder_get_parent (GLADE_PLACEHOLDER (source));
+ return (parent) ? glade_drag_can_drag (GLADE_DRAG (parent)) : FALSE;
+}
+
+static gboolean
+glade_placeholder_drag_can_drop (GladeDrag *dest, GObject *data)
+{
+ if (GLADE_IS_WIDGET_ADAPTOR (data))
+ {
+ GType otype = glade_widget_adaptor_get_object_type (GLADE_WIDGET_ADAPTOR (data));
+
+ if (g_type_is_a (otype, GTK_TYPE_WIDGET) && !GWA_IS_TOPLEVEL (data))
+ return TRUE;
+ }
+ else if (GTK_IS_WIDGET (data))
+ {
+ GladeWidget *parent, *new_child;
+
+ /* Avoid recursion */
+ if (gtk_widget_is_ancestor (GTK_WIDGET (dest), GTK_WIDGET (data)))
+ return FALSE;
+
+ parent = glade_placeholder_get_parent (GLADE_PLACEHOLDER (dest));
+
+ if ((new_child = glade_widget_get_from_gobject (data)) &&
+ !glade_widget_add_verify (parent, new_child, FALSE))
+ return FALSE;
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static gboolean
+glade_placeholder_drag_drop (GladeDrag *dest, GObject *data)
+{
+ GladePlaceholder *placeholder = GLADE_PLACEHOLDER (dest);
+ GladeWidget *gsource;
+
+ if (!data)
+ return FALSE;
+
+ if (GLADE_IS_WIDGET_ADAPTOR (data))
+ {
+ GladeWidget *parent = glade_placeholder_get_parent (placeholder);
+
+ glade_command_create (GLADE_WIDGET_ADAPTOR (data), parent, placeholder,
+ glade_widget_get_project (parent));
+ return TRUE;
+ }
+ else if ((gsource = glade_widget_get_from_gobject (data)))
+ {
+ GladeWidget *parent = glade_placeholder_get_parent (placeholder);
+ GList widgets = {gsource, NULL, NULL};
+
+ /* Check for recursive paste */
+ if (parent != gsource)
+ {
+ glade_command_dnd (&widgets, parent, placeholder);
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+static void
+glade_placeholder_drag_highlight (GladeDrag *dest, gboolean highlight)
+{
+ GladePlaceholderPrivate *priv = GLADE_PLACEHOLDER (dest)->priv;
+
+ if (priv->drag_highlight == highlight)
+ return;
+
+ priv->drag_highlight = highlight;
+ gtk_widget_queue_draw (GTK_WIDGET (dest));
+}
+
+static void
+glade_placeholder_drag_init (GladeDragInterface *iface)
+{
+ iface->can_drag = glade_placeholder_drag_can_drag;
+ iface->can_drop = glade_placeholder_drag_can_drop;
+ iface->drop = glade_placeholder_drag_drop;
+ iface->highlight = glade_placeholder_drag_highlight;
+}
+
+static void
+glade_placeholder_class_init (GladePlaceholderClass *klass)
+{
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ gchar *path;
+ cairo_surface_t *surface;
+
+ object_class->finalize = glade_placeholder_finalize;
+ object_class->set_property = glade_placeholder_set_property;
+ object_class->get_property = glade_placeholder_get_property;
+
+ widget_class->realize = glade_placeholder_realize;
+ widget_class->unrealize = glade_placeholder_unrealize;
+ widget_class->map = glade_placeholder_map;
+ widget_class->unmap = glade_placeholder_unmap;
+ widget_class->size_allocate = glade_placeholder_size_allocate;
+ widget_class->draw = glade_placeholder_draw;
+ widget_class->motion_notify_event = glade_placeholder_motion_notify_event;
+ widget_class->button_press_event = glade_placeholder_button_press;
+ widget_class->popup_menu = glade_placeholder_popup_menu;
+
+ /* GtkScrollable implementation */
+ g_object_class_override_property (object_class, PROP_HADJUSTMENT,
+ "hadjustment");
+ g_object_class_override_property (object_class, PROP_VADJUSTMENT,
+ "vadjustment");
+ g_object_class_override_property (object_class, PROP_HSCROLL_POLICY,
+ "hscroll-policy");
+ g_object_class_override_property (object_class, PROP_VSCROLL_POLICY,
+ "vscroll-policy");
+
+ /* Create our tiled background pattern */
+ path = g_build_filename (glade_app_get_pixmaps_dir (), "placeholder.png", NULL);
+ surface = cairo_image_surface_create_from_png (path);
+
+ if (!surface)
+ g_warning ("Failed to create surface for %s\n", path);
+ else
+ {
+ placeholder_pattern = cairo_pattern_create_for_surface (surface);
+ cairo_pattern_set_extend (placeholder_pattern, CAIRO_EXTEND_REPEAT);
+ }
+ g_free (path);
+
+ g_type_class_add_private (klass, sizeof (GladePlaceholderPrivate));
+}
/**
* glade_placeholder_new:
View Lorry Controller Status