show tooltips for tabs

on the run (yes sucks, sorry) fixes a bug where windows were not
activated on hovering the tab (for focus-follows-mouse policies)

REQUEST: 95

The iconbar already shows tooltips and I doubt the claim that (untabbed)
titlebars are "often" too short for the window title.

src/IconButton.hh

@@ -66,6 +66,7 @@ public:
     bool setOrientation(FbTk::Orientation orient);
 
     virtual unsigned int preferredWidth() const;
+    void showTooltip();
 
     const FbTk::Signal<> &titleChanged() { return m_title_changed; }
 
@@ -74,7 +75,6 @@ protected:
 private:
     void reconfigAndClear();
     void setupWindow();
-    void showTooltip();
 
     /// Refresh all pixmaps and windows
     /// @param setup Wether to setup window again.

src/Window.cc

@@ -2774,10 +2774,13 @@ void FluxboxWindow::enterNotifyEvent(XCrossingEvent &ev) {
         Fluxbox::instance()->keys()->doAction(ev.type, ev.state, 0,
                                               Keys::ON_WINDOW, m_client);
 
-    WinClient *client = 0;
-    if (screen().focusControl().isMouseTabFocus()) {
-        // determine if we're in a label button (tab)
-        client = winClientOfLabelButtonWindow(ev.window);
+    // determine if we're in a label button (tab)
+    WinClient *client = winClientOfLabelButtonWindow(ev.window);
+    if (client) {
+        if (IconButton *tab = m_labelbuttons[client]) {
+            m_has_tooltip = true;
+            tab->showTooltip();
+        }
     }
 
     if (ev.window == frame().window() ||
@@ -2818,6 +2821,11 @@ void FluxboxWindow::leaveNotifyEvent(XCrossingEvent &ev) {
         return;
     }
 
+    if (m_has_tooltip) {
+        m_has_tooltip = false;
+        screen().hideTooltip();
+    }
+
     // still inside?
     if (ev.x_root > frame().x() && ev.y_root > frame().y() &&
         ev.x_root <= (int)(frame().x() + frame().width()) &&

src/Window.hh

@@ -576,6 +576,7 @@ private:
     WinClient *m_client; ///< current client
     typedef std::map<WinClient *, IconButton *> Client2ButtonMap;
     Client2ButtonMap m_labelbuttons;
+    bool m_has_tooltip;
 
     SizeHints m_size_hint;
     struct {