Cocoa: Allow frameless NSWindow child QWindows

Showing, moving and resizing

Contrarily to what an NSWindow does to its NSViews, child NSWindows need
to be explicitly shown and hidden, and clipped if the parent NSWindow
changes geometry. Also, hiding an NSWindow will not hide its child
windows. This needed to be managed manually, adding 2 additional states
to QCocoaWindow to reflect whether a child window has been clipped out by
any ancestor geometry change, or hidden by any ancestor being hid. Also,
ordering out an NSWindow will remove it fromm its parent's child windows
array, making necessary to maintain a parallel list of child windows in
QCocoaWindow.

Stack order

Although child NSWindows can be ordered relatively to each other, they
need to be added again to be moved lower in the window stack. This also
means the windows above it need to be added on top.

Key (focus) status

One of the remaining issues, is to make sure the top level window keeps
the "key status" while still forwarding key events to the child window.

Keeping same event propagation

This use case is best illustrated with undocking QDockWidgets (if these
are child NSWindows). The main issue is to make sure the QDockArea will
get the mouse events right after undocking a dock widget. We used a similar
workaround as the "key status" problem, and manually forward the mouse
events to the dock area's QWindow.

Manual test, by Morten Johan Sørvig, included.

Task-number: QTBUG-33082
Task-number: QTBUG-22815
Change-Id: I50e34936fb82bff013e99f4bcb3bd0db0704c6ae
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>

1 files changed, 158 insertions, 0 deletions

diff --git a/tests/manual/windowchildgeometry/controllerwidget.h b/tests/manual/windowchildgeometry/controllerwidget.h
new file mode 100644
index 0000000000..9774ca408c
--- /dev/null
+++ b/tests/manual/windowchildgeometry/controllerwidget.h
@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CONTROLLERWIDGET_H
+#define CONTROLLERWIDGET_H
+
+#include <QMainWindow>
+#include <QGroupBox>
+#include <QScopedPointer>
+
+QT_BEGIN_NAMESPACE
+class QSpinBox;
+class QLabel;
+class QGridLayout;
+QT_END_NAMESPACE
+
+class TypeControl;
+class HintControl;
+
+// A control for editing points or sizes
+class CoordinateControl : public QWidget
+{
+    Q_OBJECT
+
+public:
+    CoordinateControl(const QString &sep);
+
+    void setPointValue(const QPoint &p)  { setCoordinates(p.x(), p.y()); }
+    QPoint pointValue() const            { const QPair<int, int> t = coordinates(); return QPoint(t.first, t.second); }
+
+    void setSizeValue(const QSize &s)    { setCoordinates(s.width(), s.height()); }
+    QSize sizeValue() const              { const QPair<int, int> t = coordinates(); return QSize(t.first, t.second); }
+
+signals:
+    void pointValueChanged(const QPoint &p);
+    void sizeValueChanged(const QSize &s);
+
+private slots:
+    void spinBoxChanged();
+
+private:
+    void setCoordinates(int x, int y);
+    QPair<int, int> coordinates() const;
+
+    QSpinBox *m_x;
+    QSpinBox *m_y;
+};
+
+// A control for editing QRect
+class RectControl : public QGroupBox
+{
+    Q_OBJECT
+public:
+    RectControl();
+    void setRectValue(const QRect &r);
+    QRect rectValue() const;
+
+signals:
+    void changed(const QRect &r);
+    void sizeChanged(const QSize &s);
+    void positionChanged(const QPoint &s);
+
+private slots:
+    void handleChanged();
+
+private:
+    CoordinateControl *m_point;
+    CoordinateControl *m_size;
+};
+
+// Base class for controlling the position of a Window (QWindow or QWidget)
+class BaseWindowControl : public QGroupBox
+{
+    Q_OBJECT
+
+protected:
+    explicit BaseWindowControl(QObject *w);
+
+public:
+    virtual bool eventFilter(QObject *, QEvent *);
+    virtual void refresh();
+
+private slots:
+    void posChanged(const QPoint &);
+    void sizeChanged(const QSize &);
+    void framePosChanged(const QPoint &);
+
+protected:
+    QGridLayout *m_layout;
+    QObject *m_object;
+
+private:
+    virtual QRect objectGeometry(const QObject *o) const = 0;
+    virtual void setObjectGeometry(QObject *o, const QRect &) const = 0;
+
+    virtual QPoint objectFramePosition(const QObject *o) const = 0;
+    virtual void setObjectFramePosition(QObject *o, const QPoint &) const = 0;
+
+    virtual QPoint objectMapToGlobal(const QObject *o, const QPoint &) const = 0;
+
+    RectControl *m_geometry;
+    CoordinateControl *m_framePosition;
+    QLabel *m_moveEventLabel;
+    QLabel *m_resizeEventLabel;
+    QLabel *m_mouseEventLabel;
+    unsigned m_moveCount;
+    unsigned m_resizeCount;
+};
+
+class ControllerWidget : public QMainWindow
+{
+    Q_OBJECT
+public:
+    explicit ControllerWidget(QWidget *parent = 0);
+    ~ControllerWidget();
+private:
+    QScopedPointer<QWindow> m_testWindow;
+};
+
+#endif // CONTROLLERWIDGET_H