debugger: use an expandable tree in the debugger tooltip

src/plugins/debugger/debuggertooltip.cpp

@@ -0,0 +1,211 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+**
+**************************************************************************/
+
+#include "debuggertooltip.h"
+
+#include <QtCore/QPointer>
+#include <QtCore/QtDebug>
+
+#include <QtGui/QApplication>
+#include <QtGui/QHBoxLayout>
+#include <QtGui/QHeaderView>
+#include <QtGui/QKeyEvent>
+#include <QtGui/QLabel>
+#include <QtGui/QTreeView>
+#include <QtGui/QVBoxLayout>
+#include <QtGui/QWidget>
+
+
+namespace Debugger {
+namespace Internal {
+
+///////////////////////////////////////////////////////////////////////
+//
+// TooltipTreeView
+//
+///////////////////////////////////////////////////////////////////////
+
+class ToolTipTreeView : public QTreeView
+{
+public:
+    ToolTipTreeView(QWidget *parent = 0) : QTreeView(parent) {}
+
+/*   
+    QSize sizeHint() const {
+        qDebug() << viewport()->size()
+            << viewport()->size().boundedTo(QSize(500, 300));
+        return viewport()->size().boundedTo(QSize(100, 100));
+    }
+*/
+};
+
+///////////////////////////////////////////////////////////////////////
+//
+// TooltipWidget
+//
+///////////////////////////////////////////////////////////////////////
+
+class ToolTipWidget : public QTreeView
+{
+    Q_OBJECT
+
+public:
+    ToolTipWidget(QWidget *parent);
+
+    void done();
+    void run(const QPoint &point, QAbstractItemModel *model,
+        const QModelIndex &index, const QString &msg);
+    bool eventFilter(QObject *ob, QEvent *ev);
+
+    QSize sizeHint() const { return m_size; }
+
+    int computeHeight(const QModelIndex &index)
+    {
+        int s = rowHeight(index);
+        for (int i = 0; i < model()->rowCount(index); ++i)
+            s += computeHeight(model()->index(i, 0, index));
+        return s;
+    }
+
+    Q_SLOT void computeSize() 
+    {
+        int columns = 0;
+        for (int i = 0; i < 3; ++i) {
+            resizeColumnToContents(i);
+            columns += sizeHintForColumn(i);
+        }
+        int rows = computeHeight(QModelIndex());
+        m_size = QSize(columns + 5, rows + 5);
+        setMinimumSize(m_size);
+        setMaximumSize(m_size);
+    }
+private:
+    QSize m_size;
+};
+
+static QPointer<ToolTipWidget> theToolTipWidget;
+
+
+ToolTipWidget::ToolTipWidget(QWidget *parent)
+    : QTreeView(parent)
+{
+    setWindowFlags(Qt::ToolTip | Qt::WindowStaysOnTopHint);
+    setFocusPolicy(Qt::NoFocus);
+
+    header()->hide();
+
+    setUniformRowHeights(true);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    connect(this, SIGNAL(collapsed(QModelIndex)), this, SLOT(computeSize()),
+        Qt::QueuedConnection);
+    connect(this, SIGNAL(expanded(QModelIndex)), this, SLOT(computeSize()),
+        Qt::QueuedConnection);
+
+    qApp->installEventFilter(this);
+}
+
+bool ToolTipWidget::eventFilter(QObject *ob, QEvent *ev)
+{
+    Q_UNUSED(ob);
+    switch (ev->type()) {
+    case QEvent::ShortcutOverride:
+        if (static_cast<QKeyEvent *>(ev)->key() == Qt::Key_Escape)
+            return true;
+        break;
+    case QEvent::KeyPress:
+        if (static_cast<QKeyEvent *>(ev)->key() == Qt::Key_Escape) {
+            return true;
+        }
+        break;
+    case QEvent::KeyRelease:
+        if (static_cast<QKeyEvent *>(ev)->key() == Qt::Key_Escape) {
+            done();
+            return true;
+        }
+        break;
+    case QEvent::WindowDeactivate:
+    case QEvent::FocusOut:
+        done();
+        break;
+    default:
+        break;
+    }
+    return false;
+}
+
+void ToolTipWidget::done()
+{
+    qApp->removeEventFilter(this);
+    deleteLater();
+}
+
+void ToolTipWidget::run(const QPoint &point, QAbstractItemModel *model,
+    const QModelIndex &index, const QString &msg)
+{
+    move(point);
+    setModel(model);
+    setRootIndex(index.parent());
+    computeSize();
+    setRootIsDecorated(model->hasChildren(index));
+    // FIXME: use something more sensible
+    QPalette pal = palette();
+    QColor bg = pal.color(QPalette::Base);
+    bg.setAlpha(20);
+    pal.setColor(QPalette::Base, bg);
+    setPalette(pal);
+    //viewport()->setPalette(pal);
+}
+
+void showDebuggerToolTip(const QPoint &point, QAbstractItemModel *model,
+        const QModelIndex &index, const QString &msg)
+{
+    if (model) {
+        if (!theToolTipWidget)
+            theToolTipWidget = new ToolTipWidget(0);
+        theToolTipWidget->run(point, model, index, msg);
+        theToolTipWidget->show();
+    } else if (theToolTipWidget) {
+        theToolTipWidget->done();
+        theToolTipWidget = 0;
+    }
+}
+
+void hideDebuggerToolTip(int delay)
+{
+    Q_UNUSED(delay)
+    if (theToolTipWidget)
+        theToolTipWidget->done();
+}
+
+} // namespace Internal
+} // namespace Debugger
+
+#include "debuggertooltip.moc"