viewer: Add toggle buttons for setting the sizing mode

Set the sizing mode to Best Fit or Page Width just like evince. This
needs a little dance to shut off the signal handlers when the mode
gets set initially or otherwise outside of the buttons themselves.

1 files changed, 72 insertions, 0 deletions

diff --git a/src/evbp-viewer.c b/src/evbp-viewer.c
index 6434127..be7ae93 100644
--- a/src/evbp-viewer.c
+++ b/src/evbp-viewer.c
@@ -49,6 +49,22 @@ evbp_viewer_dispose(GObject *object)
 }
 
 static void
+evbp_viewer_zoom_best_fit(GtkToggleAction *action, EvbpViewer *viewer)
+{
+    ev_document_model_set_sizing_mode(viewer->model,
+                                      gtk_toggle_action_get_active(action) ?
+                                      EV_SIZING_BEST_FIT : EV_SIZING_FREE);
+}
+
+static void
+evbp_viewer_zoom_page_width(GtkToggleAction *action, EvbpViewer *viewer)
+{
+    ev_document_model_set_sizing_mode(viewer->model,
+                                      gtk_toggle_action_get_active(action) ?
+                                      EV_SIZING_FIT_WIDTH : EV_SIZING_FREE);
+}
+
+static void
 evbp_viewer_previous_page(GtkAction *action, EvbpViewer *viewer)
 {
     ev_view_previous_page(EV_VIEW(viewer->view));
@@ -61,6 +77,40 @@ evbp_viewer_next_page(GtkAction *action, EvbpViewer *viewer)
 }
 
 static void
+sizing_mode_handler(GObject *gobject, GParamSpec *pspec, gpointer user_data)
+{
+    EvDocumentModel *model = EV_DOCUMENT_MODEL(gobject);
+    EvbpViewer *viewer = EVBP_VIEWER(user_data);
+    EvSizingMode mode;
+    GtkAction *action;
+
+    /* set toggle states based on model */
+    mode = ev_document_model_get_sizing_mode(model);
+
+    action = gtk_action_group_get_action(viewer->action_group,
+                                         "ViewBestFit");
+    g_signal_handlers_block_by_func(action,
+                                    G_CALLBACK(evbp_viewer_zoom_best_fit),
+                                    viewer);
+    gtk_toggle_action_set_active(GTK_TOGGLE_ACTION(action),
+                                 mode == EV_SIZING_BEST_FIT);
+    g_signal_handlers_unblock_by_func(action,
+                                      G_CALLBACK(evbp_viewer_zoom_best_fit),
+                                      viewer);
+
+    action = gtk_action_group_get_action(viewer->action_group,
+                                         "ViewPageWidth");
+    g_signal_handlers_block_by_func(action,
+                                    G_CALLBACK(evbp_viewer_zoom_page_width),
+                                    viewer);
+    gtk_toggle_action_set_active(GTK_TOGGLE_ACTION(action),
+                                 mode == EV_SIZING_FIT_WIDTH);
+    g_signal_handlers_unblock_by_func(action,
+                                      G_CALLBACK(evbp_viewer_zoom_page_width),
+                                      viewer);
+}
+
+static void
 evbp_viewer_class_init(EvbpViewerClass *class)
 {
     GObjectClass *object_class = G_OBJECT_CLASS(class);
@@ -79,11 +129,25 @@ static const GtkActionEntry action_entries[] = {
       G_CALLBACK(evbp_viewer_next_page) }
 };
 
+static const GtkToggleActionEntry toggle_action_entries[] = {
+    { "ViewBestFit", EV_STOCK_ZOOM_PAGE,
+      "_Best Fit", NULL,
+      "Make the document fill the window",
+      G_CALLBACK(evbp_viewer_zoom_best_fit), FALSE },
+    { "ViewPageWidth", EV_STOCK_ZOOM_WIDTH,
+      "Fit Page _Width", NULL,
+      "Make the document fill the window width",
+      G_CALLBACK(evbp_viewer_zoom_page_width), FALSE }
+};
+
 static const gchar ui_string[] =
     "<ui>\n"
     "  <toolbar name=\"ViewerToolbar\">\n"
     "    <toolitem name=\"GoPreviousPage\" action=\"GoPreviousPage\"/>\n"
     "    <toolitem name=\"GoNextPage\" action=\"GoNextPage\"/>\n"
+    "    <separator/>\n"
+    "    <toolitem name=\"ViewBestFit\" action=\"ViewBestFit\"/>\n"
+    "    <toolitem name=\"ViewPageWidth\" action=\"ViewPageWidth\"/>\n"
     "  </toolbar>\n"
     "</ui>\n";
 
@@ -99,6 +163,10 @@ evbp_viewer_init(EvbpViewer *viewer)
     viewer->action_group = gtk_action_group_new("ViewerActions");
     gtk_action_group_add_actions(viewer->action_group, action_entries,
                                  G_N_ELEMENTS(action_entries), viewer);
+    gtk_action_group_add_toggle_actions(viewer->action_group,
+                                        toggle_action_entries,
+                                        G_N_ELEMENTS(toggle_action_entries),
+                                        viewer);
     gtk_action_group_set_sensitive(viewer->action_group, FALSE);
 
     viewer->ui_manager = gtk_ui_manager_new();
@@ -116,6 +184,10 @@ evbp_viewer_init(EvbpViewer *viewer)
     gtk_widget_show(toolbar);
 
     viewer->model = ev_document_model_new();
+    sizing_mode_handler(G_OBJECT(viewer->model), NULL, viewer);
+    g_signal_connect(viewer->model, "notify::sizing-mode",
+                     G_CALLBACK(sizing_mode_handler), viewer);
+
     viewer->scroll = gtk_scrolled_window_new(NULL, NULL);
     gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(viewer->scroll),
                                    GTK_POLICY_AUTOMATIC,