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Move drag and drop code from layer element to layer selector.

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This commit is contained in:
Mario Hüttel
2019-03-15 23:17:03 +01:00
parent 60f54e2240
commit 64508104bc
3 changed files with 92 additions and 67 deletions
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81
widgets/layer-element.c
View File

@@ -57,65 +57,6 @@ static void layer_element_class_init(LayerElementClass *klass)
oclass->constructed = layer_element_constructed;
}
static GtkTargetEntry entries[] = {
{ "GTK_LIST_BOX_ROW", GTK_TARGET_SAME_APP, 0 }
};
static void layer_element_drag_begin(GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkWidget *row;
GtkAllocation alloc;
cairo_surface_t *surface;
cairo_t *cr;
int x, y;
(void)data;
row = gtk_widget_get_ancestor(widget, GTK_TYPE_LIST_BOX_ROW);
gtk_widget_get_allocation(row, &alloc);
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, alloc.width, alloc.height);
cr = cairo_create(surface);
gtk_style_context_add_class (gtk_widget_get_style_context(row), "drag-icon");
gtk_widget_draw (row, cr);
gtk_style_context_remove_class(gtk_widget_get_style_context(row), "drag-icon");
gtk_widget_translate_coordinates (widget, row, 0, 0, &x, &y);
cairo_surface_set_device_offset (surface, -x, -y);
gtk_drag_set_icon_surface (context, surface);
cairo_destroy (cr);
cairo_surface_destroy (surface);
g_object_set_data(G_OBJECT(gtk_widget_get_parent(row)), "drag-row", row);
gtk_style_context_add_class(gtk_widget_get_style_context(row), "drag-row");
}
static void layer_element_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
{
GtkWidget *row;
(void)context;
(void)data;
row = gtk_widget_get_ancestor(widget, GTK_TYPE_LIST_BOX_ROW);
g_object_set_data(G_OBJECT(gtk_widget_get_parent(row)), "drag-row", NULL);
gtk_style_context_remove_class(gtk_widget_get_style_context(row), "drag-row");
gtk_style_context_remove_class(gtk_widget_get_style_context(row), "drag-hover");
}
static void layer_element_drag_data_get(GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data,
guint info, guint time, gpointer data)
{
(void)context;
(void)info;
(void)time;
(void)data;
gtk_selection_data_set(selection_data, gdk_atom_intern_static_string("GTK_LIST_BOX_ROW"),
32, (const guchar *)&widget, sizeof(gpointer));
}
static void layer_element_init(LayerElement *self)
{
GtkBuilder *builder;
@@ -131,13 +72,6 @@ static void layer_element_init(LayerElement *self)
self->priv.name = GTK_ENTRY(gtk_builder_get_object(builder, "entry"));
self->priv.event_handle = GTK_EVENT_BOX(gtk_builder_get_object(builder, "event-box"));
/* Setup drag and drop */
gtk_style_context_add_class (gtk_widget_get_style_context(GTK_WIDGET(self)), "row");
gtk_drag_source_set(GTK_WIDGET(self->priv.event_handle), GDK_BUTTON1_MASK, entries, 1, GDK_ACTION_MOVE);
g_signal_connect(self->priv.event_handle, "drag-begin", G_CALLBACK(layer_element_drag_begin), NULL);
g_signal_connect(self->priv.event_handle, "drag-data-get", G_CALLBACK(layer_element_drag_data_get), NULL);
g_signal_connect(self->priv.event_handle, "drag-end", G_CALLBACK(layer_element_drag_end), NULL);
g_object_unref(builder);
}
@@ -194,4 +128,19 @@ void layer_element_set_color(LayerElement *elem, GdkRGBA *rgba)
gtk_color_chooser_set_rgba(GTK_COLOR_CHOOSER(elem->priv.color), rgba);
}
void layer_element_set_dnd_callbacks(LayerElement *elem, GtkTargetEntry *entries, int entry_count,
void (*drag_begin)(GtkWidget *, GdkDragContext *, gpointer),
void (*drag_data_get)(GtkWidget *, GdkDragContext *,
GtkSelectionData *, guint , guint, gpointer),
void (*drag_end)(GtkWidget *, GdkDragContext *, gpointer))
{
/* Setup drag and drop */
gtk_style_context_add_class (gtk_widget_get_style_context(GTK_WIDGET(elem)), "row");
gtk_drag_source_set(GTK_WIDGET(elem->priv.event_handle), GDK_BUTTON1_MASK, entries, entry_count, GDK_ACTION_MOVE);
g_signal_connect(elem->priv.event_handle, "drag-begin", G_CALLBACK(drag_begin), NULL);
g_signal_connect(elem->priv.event_handle, "drag-data-get", G_CALLBACK(drag_data_get), NULL);
g_signal_connect(elem->priv.event_handle, "drag-end", G_CALLBACK(drag_end), NULL);
}
/** @} */

12
widgets/layer-element.h
View File

@@ -118,6 +118,18 @@ void layer_element_get_color(LayerElement *elem, GdkRGBA *rgba);
*/
void layer_element_set_color(LayerElement *elem, GdkRGBA *rgba);
/**
* @brief layer_element_set_dnd_callbacks
* @param elem
* @param entries
* @param entry_count
*/
void layer_element_set_dnd_callbacks(LayerElement *elem, GtkTargetEntry *entries, int entry_count,
void (*drag_begin)(GtkWidget *, GdkDragContext *, gpointer),
void (*drag_data_get)(GtkWidget *, GdkDragContext *,
GtkSelectionData *, guint , guint, gpointer),
void (*drag_end)(GtkWidget *, GdkDragContext *, gpointer));
G_END_DECLS
#endif /* __LAYER_ELEMENT_H__ */