Refactor header bar mode changing

Fixes #101

src/ag-header-bar.c

@@ -17,6 +17,11 @@ enum {
     PROP_COUNT
 };
 
+enum {
+    SIGNAL_MODE_CHANGED,
+    SIGNAL_COUNT
+};
+
 static void ag_header_bar_dispose(GObject *gobject);
 static void ag_header_bar_finalize(GObject *gobject);
 
@@ -25,6 +30,7 @@ G_DEFINE_TYPE_WITH_PRIVATE(AgHeaderBar, ag_header_bar, GTK_TYPE_HEADER_BAR);
 #define GET_PRIV(v, o) AgHeaderBarPrivate *v = ag_header_bar_get_instance_private(o);
 
 static GParamSpec *properties[PROP_COUNT];
+static guint signals[SIGNAL_COUNT] = { 0 };
 
 static void
 ag_header_bar_selection_mode_cb(GtkButton   *button,
@@ -32,22 +38,58 @@ ag_header_bar_selection_mode_cb(GtkButton   *button,
 {
     GET_PRIV(priv, header_bar);
 
-    switch (priv->mode) {
+    /* If we are not in list mode, this transition is invalid */
-        case AG_HEADER_BAR_MODE_LIST:
+    if (priv->mode != AG_HEADER_BAR_MODE_LIST) {
-            ag_header_bar_set_mode(header_bar, AG_HEADER_BAR_MODE_SELECTION);
-
-            break;
-
-        case AG_HEADER_BAR_MODE_SELECTION:
-            ag_header_bar_set_mode(header_bar, AG_HEADER_BAR_MODE_LIST);
-
-            break;
-
-        default:
         g_warning("Invalid header bar mode transition!");
 
-            break;
+        return;
     }
+
+    g_signal_emit(
+            header_bar,
+            signals[SIGNAL_MODE_CHANGED], 0,
+            AG_HEADER_BAR_MODE_SELECTION
+        );
+}
+
+static void
+ag_header_bar_selection_cancel_cb(GtkButton   *button,
+                                  AgHeaderBar *header_bar)
+{
+    GET_PRIV(priv, header_bar);
+
+    /* If we are not in selection mode, this transition is invalid */
+    if (priv->mode != AG_HEADER_BAR_MODE_SELECTION) {
+        g_warning("Invalid header bar mode transition!");
+
+        return;
+    }
+
+    g_signal_emit(
+            header_bar,
+            signals[SIGNAL_MODE_CHANGED], 0,
+            AG_HEADER_BAR_MODE_LIST
+        );
+}
+
+static void
+ag_header_bar_back_cb(GtkButton   *button,
+                      AgHeaderBar *header_bar)
+{
+    GET_PRIV(priv, header_bar);
+
+    /* If we are not in chart mode, this transition is invalid */
+    if (priv->mode != AG_HEADER_BAR_MODE_CHART) {
+        g_warning("Invalid header bar mode transition!");
+
+        return;
+    }
+
+    g_signal_emit(
+            header_bar,
+            signals[SIGNAL_MODE_CHANGED], 0,
+            AG_HEADER_BAR_MODE_LIST
+        );
 }
 
 static void
@@ -56,6 +98,10 @@ ag_header_bar_set_selection_mode(AgHeaderBar *header_bar, gboolean state)
     GtkStyleContext *style;
     GET_PRIV(priv, header_bar);
 
+    if (state == (priv->mode == AG_HEADER_BAR_MODE_SELECTION)) {
+         return;
+    }
+
     style = gtk_widget_get_style_context(GTK_WIDGET(header_bar));
 
     if (state) {
@@ -83,13 +129,15 @@ ag_header_bar_set_mode_internal(AgHeaderBar     *header_bar,
                                 AgHeaderBarMode mode,
                                 gboolean        force)
 {
+    gboolean        invalid = FALSE;
+    AgHeaderBarMode old_mode;
     GET_PRIV(priv, header_bar);
 
     if (!force && (priv->mode == mode)) {
         return;
     }
 
-    priv->mode = mode;
+    old_mode   = priv->mode;
 
     switch (mode) {
         case AG_HEADER_BAR_MODE_LIST:
@@ -124,13 +172,19 @@ ag_header_bar_set_mode_internal(AgHeaderBar     *header_bar,
             break;
 
         default:
+            invalid = TRUE;
             g_warning("Invalid header bar mode!");
 
             break;
     }
 
+    if (invalid) {
+        priv->mode = old_mode;
+    } else {
+        priv->mode = mode;
         g_object_notify_by_pspec(G_OBJECT(header_bar), properties[PROP_MODE]);
     }
+}
 
 void
 ag_header_bar_set_mode(AgHeaderBar     *header_bar,
@@ -229,6 +283,18 @@ ag_header_bar_class_init(AgHeaderBarClass *klass)
             properties[PROP_MODE]
         );
 
+    signals[SIGNAL_MODE_CHANGED] = g_signal_new(
+            "mode-changed",
+            AG_TYPE_HEADER_BAR,
+            G_SIGNAL_RUN_FIRST,
+            0,
+            NULL, NULL,
+            NULL,
+            G_TYPE_NONE,
+            1,
+            AG_TYPE_HEADER_BAR_MODE
+        );
+
     gtk_widget_class_set_template_from_resource(
             widget_class,
             "/eu/polonkai/gergely/Astrognome/ui/ag-header-bar.ui"
@@ -254,6 +320,14 @@ ag_header_bar_class_init(AgHeaderBarClass *klass)
             widget_class,
             ag_header_bar_selection_mode_cb
         );
+    gtk_widget_class_bind_template_callback(
+            widget_class,
+            ag_header_bar_selection_cancel_cb
+        );
+    gtk_widget_class_bind_template_callback(
+            widget_class,
+            ag_header_bar_back_cb
+        );
 }
 
 static void

src/ag-icon-view.c

@@ -36,7 +36,10 @@ ag_icon_view_set_mode(AgIconView *icon_view, AgIconViewMode mode)
 {
     AgIconViewPrivate *priv = ag_icon_view_get_instance_private(icon_view);
 
-    if (priv->mode != mode) {
+    if (priv->mode == mode) {
+        return;
+    }
+
     priv->mode = mode;
 
     if (mode != AG_ICON_VIEW_MODE_SELECTION) {
@@ -55,7 +58,6 @@ ag_icon_view_set_mode(AgIconView *icon_view, AgIconViewMode mode)
             properties[PROP_MODE]
         );
 }
-}
 
 AgIconViewMode
 ag_icon_view_get_mode(AgIconView *icon_view)

src/ag-window.c

@@ -1299,20 +1299,19 @@ ag_window_set_theme(AgWindow *window, AgDisplayTheme *theme)
 static void
 ag_window_tab_changed_cb(GtkStack *tabs, GParamSpec *pspec, AgWindow *window)
 {
-    GtkWidget       *active_tab;
-    const gchar     *active_tab_name = gtk_stack_get_visible_child_name(tabs);
     GET_PRIV(window);
+    GtkWidget       *old_tab = priv->current_tab;
+    GtkWidget       *new_tab = gtk_stack_get_visible_child(tabs);
+    const gchar     *active_tab_name = gtk_stack_get_visible_child_name(tabs);
 
-    g_debug("Active tab changed: %s", active_tab_name);
+    if (old_tab == new_tab) {
-
-    if (active_tab_name == NULL) {
         return;
     }
 
-    active_tab = gtk_stack_get_visible_child(tabs);
+    g_debug("Active tab changed: %s", active_tab_name);
 
     if (strcmp("chart", active_tab_name) == 0) {
-        gtk_widget_set_size_request(active_tab, 600, 600);
+        gtk_widget_set_size_request(new_tab, 600, 600);
         if (priv->theme == NULL) {
             AgSettings           *settings;
             GSettings            *main_settings;
@@ -1335,6 +1334,8 @@ ag_window_tab_changed_cb(GtkStack *tabs, GParamSpec *pspec, AgWindow *window)
     if (strcmp("list", active_tab_name) == 0) {
         ag_header_bar_set_mode(priv->header_bar, AG_HEADER_BAR_MODE_LIST);
     } else {
+        g_debug("Switching header bar to chart mode");
+
         ag_header_bar_set_mode(priv->header_bar, AG_HEADER_BAR_MODE_CHART);
 
         // Note that priv->current_tab is actually the previously selected tab,
@@ -1345,7 +1346,7 @@ ag_window_tab_changed_cb(GtkStack *tabs, GParamSpec *pspec, AgWindow *window)
         }
     }
 
-    priv->current_tab = active_tab;
+    priv->current_tab = new_tab;
 }
 
 static void
@@ -1492,46 +1493,29 @@ ag_window_refresh_action(GSimpleAction *action,
 }
 
 static void
-ag_window_set_selection_mode(AgWindow *window, gboolean state)
+ag_window_header_bar_mode_change_cb(AgHeaderBar     *header_bar,
+                                    AgHeaderBarMode mode,
+                                    AgWindow        *window)
 {
     GET_PRIV(window);
 
-    if (priv->current_tab != priv->tab_list) {
+    switch (mode) {
-        g_warning("You can activate selection mode only in the list view!");
+        case AG_HEADER_BAR_MODE_LIST:
+            ag_window_change_tab(window, "list");
+            ag_header_bar_set_mode(header_bar, mode);
+            ag_icon_view_set_mode(priv->chart_list, AG_ICON_VIEW_MODE_NORMAL);
 
-        return;
+            break;
+
+        case AG_HEADER_BAR_MODE_SELECTION:
+            ag_header_bar_set_mode(header_bar, mode);
+            ag_icon_view_set_mode(priv->chart_list, AG_ICON_VIEW_MODE_SELECTION);
+
+            break;
+
+        default:
+            break;
     }
-
-    g_debug("Set selection mode: %d", state);
-
-    if (state) {
-        ag_header_bar_set_mode(priv->header_bar, AG_HEADER_BAR_MODE_SELECTION);
-        ag_icon_view_set_mode(
-                priv->chart_list,
-                AG_ICON_VIEW_MODE_SELECTION
-            );
-    } else {
-        ag_header_bar_set_mode(priv->header_bar, AG_HEADER_BAR_MODE_LIST);
-        ag_icon_view_set_mode(
-                priv->chart_list,
-                AG_ICON_VIEW_MODE_NORMAL
-            );
-    }
-}
-
-static void
-ag_window_header_bar_mode_change_cb(AgHeaderBar *header_bar,
-                                    GParamSpec  *pspec,
-                                    AgWindow    *window)
-{
-    AgHeaderBarMode mode;
-
-    mode = ag_header_bar_get_mode(header_bar);
-
-    ag_window_set_selection_mode(
-            window,
-            (mode == AG_HEADER_BAR_MODE_SELECTION)
-        );
 }
 
 static void
@@ -1543,29 +1527,21 @@ ag_window_icon_view_mode_cb(AgIconView *icon_view,
     GVariant       *state_var = g_variant_new_boolean(
             (mode == AG_ICON_VIEW_MODE_SELECTION)
         );
+    GET_PRIV(window);
+
+    g_debug("IV mode change: %d", (mode == AG_ICON_VIEW_MODE_SELECTION));
 
     g_action_group_activate_action(
             G_ACTION_GROUP(window),
             "selection",
             state_var
         );
-}
+    ag_header_bar_set_mode(
-
+            priv->header_bar,
-static void
+            (mode == AG_ICON_VIEW_MODE_SELECTION)
-ag_window_selection_mode_action(GSimpleAction *action,
+            ? AG_HEADER_BAR_MODE_SELECTION
-                                GVariant      *parameter,
+            : AG_HEADER_BAR_MODE_LIST
-                                gpointer      user_data)
+        );
-{
-    GVariant        *state;
-    gboolean        new_state;
-    AgWindow        *window = AG_WINDOW(user_data);
-
-    state = g_action_get_state(G_ACTION(action));
-    new_state = !g_variant_get_boolean(state);
-    g_action_change_state(G_ACTION(action), g_variant_new_boolean(new_state));
-    g_variant_unref(state);
-
-    ag_window_set_selection_mode(window, new_state);
 }
 
 static void
@@ -1680,7 +1656,6 @@ static GActionEntry win_entries[] = {
     { "new-chart",    ag_window_new_chart_action,      NULL, NULL,        NULL },
     { "back",         ag_window_back_action,           NULL, NULL,        NULL },
     { "refresh",      ag_window_refresh_action,        NULL, NULL,        NULL },
-    { "selection",    ag_window_selection_mode_action, "b",  "false",     NULL },
     { "delete",       ag_window_delete_action,         NULL, NULL,        NULL },
     { "connection",   ag_window_connection_action,     "s",  "'aspects'", NULL },
 };
@@ -2012,12 +1987,6 @@ ag_window_destroy(GtkWidget *widget)
     GTK_WIDGET_CLASS(ag_window_parent_class)->destroy(widget);
 }
 
-static void
-ag_window_selection_mode_cancel_cb(GtkButton *button, AgWindow *window)
-{
-    ag_window_set_selection_mode(window, FALSE);
-}
-
 static void
 ag_window_set_property(GObject      *gobject,
                        guint        prop_id,
@@ -2207,10 +2176,6 @@ ag_window_class_init(AgWindowClass *klass)
             widget_class,
             ag_window_icon_view_mode_cb
         );
-    gtk_widget_class_bind_template_callback(
-            widget_class,
-            ag_window_selection_mode_cancel_cb
-        );
     gtk_widget_class_bind_template_callback(
             widget_class,
             ag_window_house_system_changed_cb

src/resources/ui/ag-header-bar.ui

@@ -55,6 +55,7 @@
               <object class="GtkButton" id="back_button">
                 <property name="visible">True</property>
                 <property name="action_name">win.back</property>
+                <signal name="clicked" handler="ag_header_bar_back_cb" swapped="no" object="AgHeaderBar"/>
                 <style>
                   <class name="image-button"/>
                 </style>
@@ -99,7 +100,7 @@
           <object class="GtkButton" id="selection_cancel_button">
             <property name="visible">True</property>
             <property name="label" translatable="yes">Cancel</property>
-            <signal name="clicked" handler="ag_header_bar_selection_mode_cb" object="AgHeaderBar" swapped="no"/>
+            <signal name="clicked" handler="ag_header_bar_selection_cancel_cb" object="AgHeaderBar" swapped="no"/>
           </object>
           <packing>
             <property name="name">selection</property>

src/resources/ui/ag-window.ui

@@ -83,7 +83,7 @@
     <signal name="delete-event" handler="ag_window_delete_event_callback" swapped="no"/>
     <child type="titlebar">
       <object class="AgHeaderBar" id="header_bar">
-        <signal name="notify::mode" handler="ag_window_header_bar_mode_change_cb" swapped="no"/>
+        <signal name="mode-changed" handler="ag_window_header_bar_mode_change_cb" swapped="no"/>
       </object>
     </child>
     <child>