mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2025-01-13 05:50:10 +00:00
widget-factory: Improve the flow box example
Make the selection actually do something. This is also an opportunity to test the new draw-layer vfunc in GtkTextView.
This commit is contained in:
Matthias Clasen
parent
9fab7a684b
commit
79f4d5d610
@ -531,12 +531,17 @@ populate_colors (GtkWidget *widget)
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gtk_list_box_invalidate_headers (GTK_LIST_BOX (widget));
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}
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typedef struct {
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GtkWidget *flowbox;
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gchar *filename;
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} BackgroundData;
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static void
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background_loaded_cb (GObject *source,
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GAsyncResult *res,
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gpointer data)
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{
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GtkWidget *flowbox = data;
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BackgroundData *bd = data;
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GtkWidget *child;
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GdkPixbuf *pixbuf;
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GError *error = NULL;
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@ -551,7 +556,10 @@ background_loaded_cb (GObject *source,
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child = gtk_image_new_from_pixbuf (pixbuf);
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gtk_widget_show (child);
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gtk_flow_box_insert (GTK_FLOW_BOX (flowbox), child, -1);
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gtk_flow_box_insert (GTK_FLOW_BOX (bd->flowbox), child, -1);
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child = gtk_widget_get_parent (child);
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g_object_set_data_full (G_OBJECT (child), "filename", bd->filename, g_free);
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g_free (bd);
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}
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static void
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@ -564,9 +572,18 @@ populate_flowbox (GtkWidget *button, GtkWidget *flowbox)
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gchar *filename;
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GFile *file;
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GInputStream *stream;
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BackgroundData *bd;
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GdkPixbuf *pixbuf;
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GtkWidget *child;
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g_signal_handlers_disconnect_by_func (button, populate_flowbox, flowbox);
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pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, 110, 70);
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gdk_pixbuf_fill (pixbuf, 0xffffffff);
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child = gtk_image_new_from_pixbuf (pixbuf);
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gtk_widget_show (child);
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gtk_flow_box_insert (GTK_FLOW_BOX (flowbox), child, -1);
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location = "/usr/share/backgrounds/gnome";
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dir = g_dir_open (location, 0, &error);
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if (error)
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@ -585,16 +602,19 @@ populate_flowbox (GtkWidget *button, GtkWidget *flowbox)
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{
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g_warning ("%s", error->message);
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g_clear_error (&error);
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g_free (filename);
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}
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else
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{
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bd = g_new (BackgroundData, 1);
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bd->flowbox = flowbox;
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bd->filename = filename;
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gdk_pixbuf_new_from_stream_at_scale_async (stream, 110, 110, TRUE, NULL,
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background_loaded_cb, flowbox);
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background_loaded_cb, bd);
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}
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g_object_unref (file);
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g_object_unref (stream);
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g_free (filename);
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}
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g_dir_close (dir);
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@ -643,6 +663,116 @@ set_accel (GtkApplication *app, GtkWidget *widget)
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g_strfreev (accels);
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}
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typedef struct
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{
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GtkTextView tv;
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cairo_surface_t *surface;
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} MyTextView;
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typedef GtkTextViewClass MyTextViewClass;
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G_DEFINE_TYPE (MyTextView, my_text_view, GTK_TYPE_TEXT_VIEW)
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static void
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my_text_view_init (MyTextView *tv)
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{
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}
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static void
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my_tv_draw_layer (GtkWidget *widget, GtkTextViewLayer layer, cairo_t *cr)
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{
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MyTextView *tv = (MyTextView *)widget;
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if (layer == GTK_TEXT_VIEW_LAYER_BELOW && tv->surface)
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{
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cairo_save (cr);
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cairo_set_source_surface (cr, tv->surface, 0.0, 0.0);
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cairo_paint_with_alpha (cr, 0.333);
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cairo_restore (cr);
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}
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}
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static void
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my_tv_finalize (GObject *object)
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{
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MyTextView *tv = (MyTextView *)object;
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if (tv->surface)
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cairo_surface_destroy (tv->surface);
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G_OBJECT_CLASS (my_text_view_parent_class)->finalize (object);
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}
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static void
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my_text_view_class_init (MyTextViewClass *class)
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{
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GtkTextViewClass *tv_class = GTK_TEXT_VIEW_CLASS (class);
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GObjectClass *o_class = G_OBJECT_CLASS (class);
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o_class->finalize = my_tv_finalize;
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tv_class->draw_layer = my_tv_draw_layer;
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}
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static void
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my_text_view_set_background (MyTextView *tv, const gchar *filename)
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{
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GdkPixbuf *pixbuf;
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GError *error = NULL;
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if (tv->surface)
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cairo_surface_destroy (tv->surface);
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tv->surface = NULL;
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if (filename == NULL)
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return;
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pixbuf = gdk_pixbuf_new_from_file (filename, &error);
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if (error)
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{
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g_warning ("%s", error->message);
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g_error_free (error);
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return;
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}
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tv->surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
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g_object_unref (pixbuf);
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gtk_widget_queue_draw (GTK_WIDGET (tv));
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}
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static void
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close_selection_dialog (GtkWidget *dialog, gint response, GtkWidget *tv)
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{
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GtkWidget *box;
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GtkWidget *child;
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GList *children;
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const gchar *filename;
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gtk_widget_hide (dialog);
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if (response == GTK_RESPONSE_CANCEL)
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return;
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box = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
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children = gtk_container_get_children (GTK_CONTAINER (box));
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box = children->data;
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g_list_free (children);
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g_assert (GTK_IS_FLOW_BOX (box));
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children = gtk_flow_box_get_selected_children (GTK_FLOW_BOX (box));
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if (!children)
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return;
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child = children->data;
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filename = (const gchar *)g_object_get_data (G_OBJECT (child), "filename");
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g_list_free (children);
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my_text_view_set_background ((MyTextView *)tv, filename);
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}
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static void
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activate (GApplication *app)
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{
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@ -670,6 +800,8 @@ activate (GApplication *app)
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};
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gint i;
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g_type_ensure (my_text_view_get_type ());
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builder = gtk_builder_new_from_resource ("/org/gtk/WidgetFactory/widget-factory.ui");
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gtk_builder_add_callback_symbol (builder, "on_entry_icon_release", (GCallback)on_entry_icon_release);
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gtk_builder_connect_signals (builder, NULL);
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@ -756,7 +888,8 @@ activate (GApplication *app)
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g_signal_connect (widget, "clicked", G_CALLBACK (show_dialog), dialog);
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dialog = (GtkWidget *)gtk_builder_get_object (builder, "selection_dialog");
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g_signal_connect (dialog, "response", G_CALLBACK (close_dialog), NULL);
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widget = (GtkWidget *)gtk_builder_get_object (builder, "text3");
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g_signal_connect (dialog, "response", G_CALLBACK (close_selection_dialog), widget);
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widget = (GtkWidget *)gtk_builder_get_object (builder, "selection_dialog_button");
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g_signal_connect (widget, "clicked", G_CALLBACK (show_dialog), dialog);
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@ -2787,7 +2787,7 @@ Suspendisse feugiat quam quis dolor accumsan cursus. </property>
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<property name="shadow_type">in</property>
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<property name="vexpand">True</property>
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<child>
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<object class="GtkTextView">
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<object class="MyTextView" id="text3">
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<property name="visible">True</property>
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<property name="can_focus">True</property>
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<property name="buffer">textbuffer1</property>
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@ -3339,21 +3339,14 @@ bad things might happen.</property>
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<child internal-child="vbox">
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<object class="GtkBox">
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<child>
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<object class="GtkScrolledWindow">
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<object class="GtkFlowBox" id="selection_flowbox">
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<property name="visible">True</property>
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<property name="hscrollbar-policy">never</property>
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<property name="vscrollbar-policy">never</property>
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<child>
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<object class="GtkFlowBox" id="selection_flowbox">
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<property name="visible">True</property>
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<property name="selection-mode">single</property>
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<property name="row-spacing">10</property>
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<property name="column-spacing">10</property>
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<property name="margin">10</property>
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<property name="min-children-per-line">3</property>
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<property name="max-children-per-line">9</property>
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</object>
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</child>
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<property name="selection-mode">single</property>
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<property name="row-spacing">10</property>
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<property name="column-spacing">10</property>
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<property name="margin">10</property>
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<property name="min-children-per-line">3</property>
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<property name="max-children-per-line">9</property>
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</object>
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</child>
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</object>
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