forked from AuroraMiddleware/gtk
gtk-demo: Add dnd back to the clipboard demo
This commit is contained in:
Matthias Clasen
parent
9a872f059f
commit
787111a145
@ -2,6 +2,9 @@
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*
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* GdkClipboard is used for clipboard handling. This demo shows how to
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* copy and paste text, images, colors or files to and from the clipboard.
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*
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* You can also use Drag-And-Drop to copy the data from the source to the
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* target.
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*/
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#include <glib/gi18n.h>
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@ -62,6 +65,52 @@ copy_button_clicked (GtkStack *source_stack,
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}
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}
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static void
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present_value (GtkStack *dest_stack,
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const GValue *value)
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{
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GtkWidget *child;
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if (G_VALUE_HOLDS (value, G_TYPE_FILE))
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{
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GFile *file;
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gtk_stack_set_visible_child_name (dest_stack, "File");
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child = gtk_stack_get_visible_child (dest_stack);
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file = g_value_get_object (value);
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g_object_set (child, "label", g_file_peek_path (file), NULL);
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}
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else if (G_VALUE_HOLDS (value, GDK_TYPE_RGBA))
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{
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GdkRGBA *color;
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gtk_stack_set_visible_child_name (dest_stack, "Color");
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child = gtk_widget_get_first_child (gtk_stack_get_visible_child (dest_stack));
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color = g_value_get_boxed (value);
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g_object_set (child, "rgba", color, NULL);
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}
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else if (G_VALUE_HOLDS (value, GDK_TYPE_TEXTURE) ||
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G_VALUE_HOLDS (value, GDK_TYPE_PAINTABLE))
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{
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GdkPaintable *paintable;
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gtk_stack_set_visible_child_name (dest_stack, "Image");
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child = gtk_stack_get_visible_child (dest_stack);
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paintable = g_value_get_object (value);
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g_object_set (child, "paintable", paintable, NULL);
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}
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else if (G_VALUE_HOLDS (value, G_TYPE_STRING))
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{
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gtk_stack_set_visible_child_name (dest_stack, "Text");
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child = gtk_stack_get_visible_child (dest_stack);
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gtk_label_set_label (GTK_LABEL (child), g_value_get_string (value));
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}
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}
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static void
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paste_received (GObject *source_object,
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GAsyncResult *result,
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@ -71,51 +120,13 @@ paste_received (GObject *source_object,
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GdkClipboard *clipboard;
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const GValue *value;
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GError *error = NULL;
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GtkWidget *child;
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clipboard = GDK_CLIPBOARD (source_object);
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value = gdk_clipboard_read_value_finish (clipboard, result, &error);
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if (value)
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{
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if (G_VALUE_HOLDS (value, G_TYPE_FILE))
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{
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GFile *file;
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gtk_stack_set_visible_child_name (dest_stack, "File");
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child = gtk_stack_get_visible_child (dest_stack);
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file = g_value_get_object (value);
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g_object_set (child, "label", g_file_peek_path (file), NULL);
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}
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else if (G_VALUE_HOLDS (value, GDK_TYPE_RGBA))
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{
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GdkRGBA *color;
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gtk_stack_set_visible_child_name (dest_stack, "Color");
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child = gtk_widget_get_first_child (gtk_stack_get_visible_child (dest_stack));
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color = g_value_get_boxed (value);
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g_object_set (child, "rgba", color, NULL);
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}
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else if (G_VALUE_HOLDS (value, GDK_TYPE_TEXTURE) ||
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G_VALUE_HOLDS (value, GDK_TYPE_PAINTABLE))
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{
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GdkPaintable *paintable;
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gtk_stack_set_visible_child_name (dest_stack, "Image");
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child = gtk_stack_get_visible_child (dest_stack);
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paintable = g_value_get_object (value);
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g_object_set (child, "paintable", paintable, NULL);
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}
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else if (G_VALUE_HOLDS (value, G_TYPE_STRING))
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{
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gtk_stack_set_visible_child_name (dest_stack, "Text");
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child = gtk_stack_get_visible_child (dest_stack);
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gtk_label_set_label (GTK_LABEL (child), g_value_get_string (value));
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}
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present_value (dest_stack, value);
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}
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else
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{
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@ -264,6 +275,60 @@ unset_clipboard_handler (gpointer data)
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g_signal_handlers_disconnect_by_func (clipboard, update_paste_button_sensitivity, data);
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}
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static gboolean
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on_drop (GtkStack *dest_stack,
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const GValue *value,
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double x,
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double y,
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gpointer data)
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{
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present_value (dest_stack, value);
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return TRUE;
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}
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static GdkContentProvider *
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drag_prepare (GtkDragSource *drag_source,
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double x,
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double y,
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gpointer data)
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{
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GtkWidget *button;
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GValue value = G_VALUE_INIT;
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button = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (drag_source));
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if (GTK_IS_TOGGLE_BUTTON (button))
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{
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GtkWidget *image = gtk_widget_get_first_child (button);
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GdkPaintable *paintable = gtk_image_get_paintable (GTK_IMAGE (image));
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if (GDK_IS_TEXTURE (paintable))
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{
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g_value_init (&value, GDK_TYPE_TEXTURE);
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g_value_set_object (&value, paintable);
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}
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else
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{
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g_value_init (&value, GDK_TYPE_PAINTABLE);
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g_value_set_object (&value, paintable);
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}
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}
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else
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{
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GFile *file = g_object_get_data (G_OBJECT (button), "file");
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if (file)
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{
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g_value_init (&value, G_TYPE_FILE);
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g_value_set_object (&value, file);
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}
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else
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return NULL;
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}
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return gdk_content_provider_new_for_value (&value);
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}
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GtkWidget *
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do_clipboard (GtkWidget *do_widget)
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{
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@ -273,9 +338,7 @@ do_clipboard (GtkWidget *do_widget)
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{
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GtkBuilderScope *scope;
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GtkBuilder *builder;
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GObject *copy_button;
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GObject *source_stack;
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GtkWidget *paste_button;
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GtkWidget *button;
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scope = gtk_builder_cscope_new ();
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gtk_builder_cscope_add_callback_symbols (GTK_BUILDER_CSCOPE (scope),
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@ -284,6 +347,8 @@ do_clipboard (GtkWidget *do_widget)
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"source_changed_cb", G_CALLBACK (source_changed_cb),
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"text_changed_cb", G_CALLBACK (text_changed_cb),
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"open_file_cb", G_CALLBACK (open_file_cb),
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"on_drop", G_CALLBACK (on_drop),
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"drag_prepare", G_CALLBACK (drag_prepare),
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NULL);
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builder = gtk_builder_new ();
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@ -294,14 +359,13 @@ do_clipboard (GtkWidget *do_widget)
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget));
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copy_button = gtk_builder_get_object (builder, "copy_button");
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source_stack = gtk_builder_get_object (builder, "source_stack");
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g_object_set_data (source_stack, "copy-button", copy_button);
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button = GTK_WIDGET (gtk_builder_get_object (builder, "copy_button"));
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g_object_set_data (gtk_builder_get_object (builder, "source_stack"), "copy-button", button);
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paste_button = GTK_WIDGET (gtk_builder_get_object (builder, "paste_button"));
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g_signal_connect (gtk_widget_get_clipboard (paste_button), "changed",
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G_CALLBACK (update_paste_button_sensitivity), paste_button);
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g_object_set_data_full (G_OBJECT (paste_button), "clipboard-handler", paste_button, unset_clipboard_handler);
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button = GTK_WIDGET (gtk_builder_get_object (builder, "paste_button"));
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g_signal_connect (gtk_widget_get_clipboard (button), "changed",
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G_CALLBACK (update_paste_button_sensitivity), button);
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g_object_set_data_full (G_OBJECT (button), "clipboard-handler", button, unset_clipboard_handler);
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g_object_unref (builder);
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g_object_unref (scope);
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@ -14,7 +14,7 @@
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<property name="spacing">12</property>
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<child>
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<object class="GtkLabel">
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<property name="label">“Copy” will copy the selected data the clipboard, “Paste” will present the current clipboard contents</property>
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<property name="label">“Copy” will copy the selected data the clipboard, “Paste” will show the current clipboard contents. You can also drag the data to the bottom.</property>
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<property name="wrap">1</property>
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<property name="max-width-chars">40</property>
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</object>
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@ -83,6 +83,11 @@
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<child>
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<object class="GtkToggleButton" id="image_rose">
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<property name="active">1</property>
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<child>
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<object class="GtkDragSource">
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<signal name="prepare" handler="drag_prepare"/>
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</object>
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</child>
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<child>
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<object class="GtkImage">
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<style>
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@ -96,6 +101,11 @@
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<child>
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<object class="GtkToggleButton" id="image_floppy">
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<property name="group">image_rose</property>
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<child>
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<object class="GtkDragSource">
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<signal name="prepare" handler="drag_prepare"/>
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</object>
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</child>
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<child>
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<object class="GtkImage">
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<style>
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@ -109,6 +119,11 @@
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<child>
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<object class="GtkToggleButton" id="image_logo">
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<property name="group">image_floppy</property>
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<child>
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<object class="GtkDragSource">
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<signal name="prepare" handler="drag_prepare"/>
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</object>
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</child>
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<child>
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<object class="GtkImage">
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<style>
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@ -128,6 +143,12 @@
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<property name="name">File</property>
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<property name="child">
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<object class="GtkButton" id="source_file">
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<child>
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<object class="GtkDragSource">
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<property name="propagation-phase">capture</property>
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<signal name="prepare" handler="drag_prepare"/>
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</object>
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</child>
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<property name="valign">center</property>
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<property name="child">
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<object class="GtkLabel">
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@ -160,6 +181,13 @@
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<child>
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<object class="GtkBox">
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<property name="spacing">12</property>
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<child>
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<object class="GtkDropTarget">
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<property name="actions">copy</property>
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<property name="formats">GdkTexture GdkPaintable GFile GdkRGBA gchararray</property>
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<signal name="drop" handler="on_drop" object="dest_stack"/>
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</object>
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</child>
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<child>
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<object class="GtkButton" id="paste_button">
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<property name="label" translatable="yes">_Paste</property>
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