Give tooltips to view actions.

CMakeLists.txt

@@ -12,7 +12,7 @@ set(DEBIAN_PACKAGE_SECTION "kde4")
 set(CPACK_SOURCE_GENERATOR "TBZ2")
 set(CPACK_PACKAGE_VERSION_MAJOR "0")
 set(CPACK_PACKAGE_VERSION_MINOR "9")
-set(CPACK_PACKAGE_VERSION_PATCH "0")
+set(CPACK_PACKAGE_VERSION_PATCH "50")
 set(CPACK_PACKAGE_CONTACT "Craig Drummond <craig.p.drummond@gmail.com>")
 set(CANTATA_VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}")
 set(CANTATA_VERSION_FULL "${CANTATA_VERSION}.${CPACK_PACKAGE_VERSION_PATCH}")
@@ -188,6 +188,7 @@ SET( CANTATA_MOC_HDRS
     widgets/actionlabel.h
     widgets/playqueueview.h
     widgets/groupedview.h
+    widgets/actionitemdelegate.h
     widgets/coverwidget.h
     widgets/volumecontrol.h
     widgets/genrecombo.h

ChangeLog

@@ -1,4 +1,8 @@
-0.9.0
+X.X.X
+-----
+1. Give tooltips to view actions.
+
+0.9.0
 -----
  1. Add a 'server' mode to cantata-dynamic. This contains a basic HTTP API to
     list rules, update rules, and start/stop the dynamic mode.

widgets/actionitemdelegate.cpp

@@ -25,9 +25,13 @@
 #include "itemview.h"
 #include "icon.h"
 #include "config.h"
+#include "groupedview.h"
 #include <QtGui/QPainter>
 #include <QtGui/QAction>
 #include <QtGui/QPixmap>
+#include <QtGui/QListView>
+#include <QtGui/QHelpEvent>
+#include <QtGui/QToolTip>
 
 int ActionItemDelegate::constBorder = 1;
 int ActionItemDelegate::constActionBorder = 4;
@@ -179,3 +183,73 @@ void ActionItemDelegate::drawIcons(QPainter *painter, const QRect &r, bool mouse
     }
 }
 
+bool ActionItemDelegate::helpEvent(QHelpEvent *e, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index)
+{
+    if (QEvent::ToolTip==e->type() && (act1 || act2 || toggle)) {
+        QAction *act=getAction(view, index);
+        if (act) {
+            QToolTip::showText(e->globalPos(), act->toolTip(), view);
+            return true;
+        }
+    }
+    return QStyledItemDelegate::helpEvent(e, view, option, index);
+}
+
+QAction * ActionItemDelegate::getAction(QAbstractItemView *view, const QModelIndex &index)
+{
+    if (!hasActions(index, actLevel)) {
+        return 0;
+    }
+
+    bool rtl = Qt::RightToLeft==QApplication::layoutDirection();
+    QListView *lv=qobject_cast<QListView *>(view);
+    GroupedView *gv=lv ? 0 : qobject_cast<GroupedView *>(view);
+    bool iconMode=lv && QListView::ListMode!=lv->viewMode() && index.child(0, 0).isValid();
+    QRect rect = view->visualRect(index);
+    rect.moveTo(view->viewport()->mapToGlobal(QPoint(rect.x(), rect.y())));
+    bool showCapacity = !index.data(ItemView::Role_CapacityText).toString().isEmpty();
+    bool haveToggle = toggle && !index.data(ItemView::Role_ToggleIcon).value<QIcon>().isNull();
+    if (gv || lv || showCapacity) {
+        if (iconMode) {
+            rect.adjust(ActionItemDelegate::constBorder, ActionItemDelegate::constBorder, -ActionItemDelegate::constBorder, -ActionItemDelegate::constBorder);
+        } else {
+            rect.adjust(ActionItemDelegate::constBorder+3, 0, -(ActionItemDelegate::constBorder+3), 0);
+        }
+    }
+
+    if (showCapacity) {
+        int textHeight=QFontMetrics(QApplication::font()).height();
+        rect.adjust(0, 0, 0, -(textHeight+8));
+    }
+
+    QRect actionRect=ActionItemDelegate::calcActionRect(rtl, iconMode, rect);
+    QRect actionRect2(actionRect);
+    ActionItemDelegate::adjustActionRect(rtl, iconMode, actionRect2);
+
+    actionRect=iconMode ? actionRect.adjusted(0, -2, 0, 2) : actionRect.adjusted(-2, 0, 2, 0);
+    if (act1 && actionRect.contains(QCursor::pos())) {
+        return act1;
+    }
+
+    if (act1) {
+        ActionItemDelegate::adjustActionRect(rtl, iconMode, actionRect);
+    }
+
+    actionRect=iconMode ? actionRect.adjusted(0, -2, 0, 2) : actionRect.adjusted(-2, 0, 2, 0);
+    if (act2 && actionRect.contains(QCursor::pos())) {
+        return act2;
+    }
+
+    if (haveToggle) {
+        if (act1 || act2) {
+            ActionItemDelegate::adjustActionRect(rtl, iconMode, actionRect);
+        }
+
+        actionRect=iconMode ? actionRect.adjusted(0, -2, 0, 2) : actionRect.adjusted(-2, 0, 2, 0);
+        if (toggle && actionRect.contains(QCursor::pos())) {
+            return toggle;
+        }
+    }
+
+    return 0;
+}

widgets/actionitemdelegate.h

@@ -30,6 +30,8 @@ class QAction;
 
 class ActionItemDelegate : public QStyledItemDelegate
 {
+    Q_OBJECT
+
 public:
     static void setup();
 
@@ -54,6 +56,13 @@ public:
 
     void drawIcons(QPainter *painter, const QRect &r, bool mouseOver, bool rtl, bool iconMode, const QModelIndex &index) const;
 
+public Q_SLOTS:
+    bool helpEvent(QHelpEvent *e, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index);
+
+private:
+    QAction * getAction(QAbstractItemView *view, const QModelIndex &index);
+
+public:
     QAction *act1;
     QAction *act2;
     QAction *toggle;