Debugger: Add a tab widget for separate value display.

Debugger display in separate windows currently opens several
widgets without title at the same location that disappear
below the main window when stepping.

Put them in a tabwidget and raise it when setting new values.

Task-number: QTCREATORBUG-8344
Change-Id: Icb6dd8942ab851aeeb6a9248c4a1360e8841cf61
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/watchhandler.cpp

@@ -52,6 +52,7 @@
 
 #include <QLabel>
 #include <QTextEdit>
+#include <QTabWidget>
 
 #include <ctype.h>
 #include <utils/qtcassert.h>
@@ -1611,6 +1612,39 @@ static void swapEndian(char *d, int nchar)
     }
 }
 
+static int indexOf(const QTabWidget *tw, const QWidget *w)
+{
+    for (int i = 0; i < tw->count(); ++i)
+    if (tw->widget(i) == w)
+        return i;
+    return -1;
+}
+
+void WatchHandler::removeSeparateWidget(QObject *o)
+{
+    const int index = o && o->isWidgetType() && !m_separateWindow.isNull() ?
+              indexOf(m_separateWindow, static_cast<QWidget *>(o)) : -1;
+    if (index != -1)
+        m_separateWindow->removeTab(index);
+}
+
+void WatchHandler::showSeparateWidget(QWidget *w)
+{
+    if (m_separateWindow.isNull()) {
+        m_separateWindow = new QTabWidget(debuggerCore()->mainWindow());
+        m_separateWindow->setWindowFlags(m_separateWindow->windowFlags() | Qt::Window);
+        m_separateWindow->setWindowTitle(WatchHandler::tr("Debugger - Qt Creator"));
+    }
+    const int index = indexOf(m_separateWindow, w);
+    if (index != -1) {
+        m_separateWindow->setTabText(index, w->windowTitle());
+    } else {
+        m_separateWindow->addTab(w, w->windowTitle());
+    }
+    m_separateWindow->show();
+    m_separateWindow->raise();
+}
+
 void WatchHandler::showEditValue(const WatchData &data)
 {
     const QByteArray key  = data.address ? data.hexAddress() : data.iname;
@@ -1623,6 +1657,7 @@ void WatchHandler::showEditValue(const WatchData &data)
         // QImage
         QLabel *l = qobject_cast<QLabel *>(w);
         if (!l) {
+            removeSeparateWidget(w);
             delete w;
             l = new QLabel;
             const QString title = data.address ?
@@ -1630,6 +1665,7 @@ void WatchHandler::showEditValue(const WatchData &data)
                     QLatin1String(data.hexAddress())) :
                 tr("%1 Object at Unknown Address").arg(QLatin1String(data.type));
             l->setWindowTitle(title);
+            showSeparateWidget(l);
             m_model->m_editHandlers[key] = l;
         }
         int width, height, format;
@@ -1655,13 +1691,14 @@ void WatchHandler::showEditValue(const WatchData &data)
         QImage im(bits, width, height, QImage::Format(format));
         l->setPixmap(QPixmap::fromImage(im));
         l->resize(width, height);
-        l->show();
+        showSeparateWidget(l);
     } else if (data.editformat == DisplayUtf16String
                || data.editformat == DisplayLatin1String
                || data.editformat == DisplayUtf16String) {
         // String data.
         QTextEdit *t = qobject_cast<QTextEdit *>(w);
         if (!t) {
+            removeSeparateWidget(w);
             delete w;
             t = new QTextEdit;
             m_model->m_editHandlers[key] = t;
@@ -1674,9 +1711,11 @@ void WatchHandler::showEditValue(const WatchData &data)
             str = QString::fromLatin1(ba.constData(), ba.size());
         else if (data.editformat == DisplayUtf8String)
             str = QString::fromUtf8(ba.constData(), ba.size());
+        t->setWindowTitle(QString::fromLatin1("%1 (%2)").
+                          arg(data.name, data.displayedType.isEmpty() ?
+                              QLatin1String(data.type) : data.displayedType));
         t->setText(str);
-        t->resize(400, 200);
-        t->show();
+        showSeparateWidget(t);
     } else if (data.editformat == 4) {
         // Generic Process.
         int pos = data.editvalue.indexOf('|');

src/plugins/debugger/watchhandler.h

@@ -35,8 +35,11 @@
 #include <QHash>
 #include <QSet>
 #include <QStringList>
+#include <QPointer>
 #include <QAbstractItemModel>
 
+QT_FORWARD_DECLARE_CLASS(QTabWidget)
+
 namespace Debugger {
 
 class DebuggerEngine;
@@ -136,6 +139,9 @@ public:
     void resetValueCache();
 
 private:
+    void removeSeparateWidget(QObject *o);
+    void showSeparateWidget(QWidget *w);
+
     friend class WatchModel;
 
     void saveWatchers();
@@ -146,6 +152,7 @@ private:
 
     WatchModel *m_model;
     DebuggerEngine *m_engine;
+    QPointer<QTabWidget> m_separateWindow;
 
     int m_watcherCounter;