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https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-26 05:31:07 +00:00
node-editor: Allow dragging and dropping the center picture
Dragging will just drag the render node. Dropping will replace the current contents of the textview with the dropped node. Neat side effect: You can drag the node onto itself to do a deserialize/serialize of the current text.
This commit is contained in:
Benjamin Otte
parent
cbc050b9ed
commit
2863095f06
@ -60,7 +60,7 @@ struct _NodeEditorWindow
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GtkWidget *renderer_listbox;
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GListStore *renderers;
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GdkPaintable *paintable;
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GskRenderNode *node;
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GFileMonitor *file_monitor;
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@ -167,7 +167,6 @@ static void
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text_changed (GtkTextBuffer *buffer,
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NodeEditorWindow *self)
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{
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GskRenderNode *node;
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char *text;
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GBytes *bytes;
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GtkTextIter iter;
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@ -178,10 +177,12 @@ text_changed (GtkTextBuffer *buffer,
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text_buffer_remove_all_tags (self->text_buffer);
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bytes = g_bytes_new_take (text, strlen (text));
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g_clear_pointer (&self->node, gsk_render_node_unref);
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/* If this is too slow, go fix the parser performance */
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node = gsk_render_node_deserialize (bytes, deserialize_error_func, self);
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self->node = gsk_render_node_deserialize (bytes, deserialize_error_func, self);
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g_bytes_unref (bytes);
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if (node)
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if (self->node)
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{
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/* XXX: Is this code necessary or can we have API to turn nodes into paintables? */
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GtkSnapshot *snapshot;
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@ -190,10 +191,9 @@ text_changed (GtkTextBuffer *buffer,
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guint i;
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snapshot = gtk_snapshot_new ();
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gsk_render_node_get_bounds (node, &bounds);
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gsk_render_node_get_bounds (self->node, &bounds);
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (- bounds.origin.x, - bounds.origin.y));
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gtk_snapshot_append_node (snapshot, node);
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gsk_render_node_unref (node);
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gtk_snapshot_append_node (snapshot, self->node);
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paintable = gtk_snapshot_free_to_paintable (snapshot, &bounds.size);
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gtk_picture_set_paintable (GTK_PICTURE (self->picture), paintable);
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for (i = 0; i < g_list_model_get_n_items (G_LIST_MODEL (self->renderers)); i++)
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@ -337,15 +337,9 @@ text_view_query_tooltip_cb (GtkWidget *widget,
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}
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static gboolean
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load_file_contents (NodeEditorWindow *self,
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GFile *file)
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load_bytes (NodeEditorWindow *self,
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GBytes *bytes)
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{
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GBytes *bytes;
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bytes = g_file_load_bytes (file, NULL, NULL, NULL);
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if (bytes == NULL)
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return FALSE;
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if (!g_utf8_validate (g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes), NULL))
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{
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g_bytes_unref (bytes);
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@ -361,6 +355,105 @@ load_file_contents (NodeEditorWindow *self,
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return TRUE;
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}
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static gboolean
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load_file_contents (NodeEditorWindow *self,
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GFile *file)
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{
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GBytes *bytes;
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bytes = g_file_load_bytes (file, NULL, NULL, NULL);
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if (bytes == NULL)
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return FALSE;
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return load_bytes (self, bytes);
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}
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static GdkContentProvider *
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on_picture_drag_prepare_cb (GtkDragSource *source,
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double x,
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double y,
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NodeEditorWindow *self)
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{
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if (self->node == NULL)
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return NULL;
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return gdk_content_provider_new_typed (GSK_TYPE_RENDER_NODE, self->node);
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}
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static void
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on_picture_drop_read_done_cb (GObject *source,
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GAsyncResult *res,
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gpointer data)
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{
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NodeEditorWindow *self = data;
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GOutputStream *stream = G_OUTPUT_STREAM (source);
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GdkDrop *drop = g_object_get_data (source, "drop");
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GdkDragAction action = 0;
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GBytes *bytes;
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if (g_output_stream_splice_finish (stream, res, NULL) >= 0)
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{
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bytes = g_memory_output_stream_steal_as_bytes (G_MEMORY_OUTPUT_STREAM (stream));
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if (load_bytes (self, bytes))
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action = GDK_ACTION_COPY;
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}
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g_object_unref (self);
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gdk_drop_finish (drop, action);
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g_object_unref (drop);
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return;
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}
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static void
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on_picture_drop_read_cb (GObject *source,
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GAsyncResult *res,
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gpointer data)
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{
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NodeEditorWindow *self = data;
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GdkDrop *drop = GDK_DROP (source);
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GInputStream *input;
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GOutputStream *output;
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input = gdk_drop_read_finish (drop, res, NULL, NULL);
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if (input == NULL)
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{
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g_object_unref (self);
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gdk_drop_finish (drop, 0);
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return;
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}
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output = g_memory_output_stream_new_resizable ();
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g_object_set_data (G_OBJECT (output), "drop", drop);
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g_object_ref (drop);
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g_output_stream_splice_async (output,
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input,
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G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE | G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET,
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G_PRIORITY_DEFAULT,
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NULL,
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on_picture_drop_read_done_cb,
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self);
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g_object_unref (output);
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g_object_unref (input);
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}
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static gboolean
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on_picture_drop_cb (GtkDropTargetAsync *dest,
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GdkDrop *drop,
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double x,
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double y,
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NodeEditorWindow *self)
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{
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gdk_drop_read_async (drop,
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(const char *[2]) { "application/x-gtk-render-node", NULL },
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G_PRIORITY_DEFAULT,
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NULL,
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on_picture_drop_read_cb,
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g_object_ref (self));
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return TRUE;
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}
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static void
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file_changed_cb (GFileMonitor *monitor,
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GFile *file,
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@ -735,6 +828,7 @@ node_editor_window_finalize (GObject *object)
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g_array_free (self->errors, TRUE);
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g_clear_pointer (&self->node, gsk_render_node_unref);
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g_clear_object (&self->renderers);
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G_OBJECT_CLASS (node_editor_window_parent_class)->finalize (object);
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@ -844,6 +938,8 @@ node_editor_window_class_init (NodeEditorWindowClass *class)
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gtk_widget_class_bind_template_callback (widget_class, testcase_save_clicked_cb);
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gtk_widget_class_bind_template_callback (widget_class, testcase_name_entry_changed_cb);
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gtk_widget_class_bind_template_callback (widget_class, dark_mode_cb);
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gtk_widget_class_bind_template_callback (widget_class, on_picture_drag_prepare_cb);
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gtk_widget_class_bind_template_callback (widget_class, on_picture_drop_cb);
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}
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static GtkWidget *
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@ -200,6 +200,19 @@
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<property name="can-shrink">0</property>
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<property name="halign">center</property>
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<property name="valign">center</property>
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<child>
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<object class="GtkDragSource">
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<property name="actions">copy</property>
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<signal name="prepare" handler="on_picture_drag_prepare_cb" swapped="no"/>
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</object>
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</child>
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</object>
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</child>
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<child>
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<object class="GtkDropTargetAsync">
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<property name="actions">copy</property>
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<property name="formats">application/x-gtk-render-node</property>
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<signal name="drop" handler="on_picture_drop_cb" swapped="no"/>
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</object>
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</child>
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</object>
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