gecko-dev/widget/qt/moziqwidget.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=4 et sw=4 tw=80: */
2012-05-21 11:12:37 +00:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZIQWIDGET_H
#define MOZIQWIDGET_H
#include <QApplication>
#include <QGraphicsWidget>
#include <QGraphicsView>
#include "mozqglwidgetwrapper.h"
#include "nsCOMPtr.h"
#ifdef MOZ_ENABLE_MEEGOTOUCH
#include <MSceneWindow>
#include <MInputMethodState>
#include <QtGui/QGraphicsSceneResizeEvent>
#include <QTimer>
#endif
class nsWindow;
class IMozQWidget : public QGraphicsWidget
{
Q_OBJECT
public:
/**
* Mozilla helper.
*/
virtual void setModal(bool) {}
virtual void dropReceiver() { };
virtual nsWindow* getReceiver() { return nullptr; };
virtual void activate() {}
virtual void deactivate() {}
/**
* VirtualKeyboardIntegration
*/
virtual bool isVKBOpen() { return false; }
virtual void NotifyVKB(const QRect& rect) {}
virtual void SwitchToForeground() {}
virtual void SwitchToBackground() {}
};
class MozQGraphicsViewEvents
{
public:
MozQGraphicsViewEvents(QGraphicsView* aView)
: mView(aView)
{ }
void handleEvent(QEvent* aEvent, IMozQWidget* aTopLevel)
{
if (!aEvent)
return;
if (aEvent->type() == QEvent::WindowActivate) {
if (aTopLevel)
aTopLevel->activate();
}
if (aEvent->type() == QEvent::WindowDeactivate) {
if (aTopLevel)
aTopLevel->deactivate();
}
}
void handleResizeEvent(QResizeEvent* aEvent, IMozQWidget* aTopLevel)
{
if (!aEvent)
return;
if (aTopLevel) {
// transfer new size to graphics widget
aTopLevel->setGeometry(0.0, 0.0,
static_cast<qreal>(aEvent->size().width()),
static_cast<qreal>(aEvent->size().height()));
// resize scene rect to vieport size,
// to avoid extra scrolling from QAbstractScrollable
if (mView)
mView->setSceneRect(mView->viewport()->rect());
}
}
bool handleCloseEvent(QCloseEvent* aEvent, IMozQWidget* aTopLevel)
{
if (!aEvent)
return false;
if (aTopLevel) {
// close graphics widget instead, this view will be discarded
// automatically
QApplication::postEvent(aTopLevel, new QCloseEvent(*aEvent));
aEvent->ignore();
return true;
}
return false;
}
private:
QGraphicsView* mView;
};
/**
This is a helper class to synchronize the QGraphicsView window with
its contained QGraphicsWidget for things like resizing and closing
by the user.
*/
class MozQGraphicsView : public QGraphicsView
{
Q_OBJECT
public:
MozQGraphicsView(QWidget * aParent = nullptr)
: QGraphicsView (new QGraphicsScene(), aParent)
, mEventHandler(this)
, mTopLevelWidget(nullptr)
, mGLWidget(0)
{
setMouseTracking(true);
setFrameShape(QFrame::NoFrame);
}
void SetTopLevel(IMozQWidget* aTopLevel, QWidget* aParent)
{
scene()->addItem(aTopLevel);
mTopLevelWidget = aTopLevel;
}
void setGLWidgetEnabled(bool aEnabled)
{
if (aEnabled) {
mGLWidget = new MozQGLWidgetWrapper();
mGLWidget->setViewport(this);
} else {
delete mGLWidget;
mGLWidget = 0;
setViewport(new QWidget());
}
}
protected:
virtual bool event(QEvent* aEvent)
{
mEventHandler.handleEvent(aEvent, mTopLevelWidget);
return QGraphicsView::event(aEvent);
}
virtual void resizeEvent(QResizeEvent* aEvent)
{
mEventHandler.handleResizeEvent(aEvent, mTopLevelWidget);
QGraphicsView::resizeEvent(aEvent);
}
virtual void closeEvent (QCloseEvent* aEvent)
{
if (!mEventHandler.handleCloseEvent(aEvent, mTopLevelWidget))
QGraphicsView::closeEvent(aEvent);
}
virtual void paintEvent(QPaintEvent* aEvent)
{
if (mGLWidget) {
mGLWidget->makeCurrent();
}
QGraphicsView::paintEvent(aEvent);
}
private:
MozQGraphicsViewEvents mEventHandler;
IMozQWidget* mTopLevelWidget;
MozQGLWidgetWrapper* mGLWidget;
};
#ifdef MOZ_ENABLE_MEEGOTOUCH
class MozMSceneWindow : public MSceneWindow
{
Q_OBJECT
public:
MozMSceneWindow(IMozQWidget* aTopLevel)
: MSceneWindow(aTopLevel->parentItem())
, mTopLevelWidget(aTopLevel)
{
MInputMethodState* inputMethodState = MInputMethodState::instance();
if (inputMethodState) {
connect(inputMethodState, SIGNAL(inputMethodAreaChanged(const QRect&)),
this, SLOT(VisibleScreenAreaChanged(const QRect&)));
}
}
void SetTopLevel(IMozQWidget* aTopLevel)
{
mTopLevelWidget = aTopLevel;
mTopLevelWidget->setParentItem(this);
mTopLevelWidget->installEventFilter(this);
}
protected:
virtual void resizeEvent(QGraphicsSceneResizeEvent* aEvent)
{
mCurrentSize = aEvent->newSize();
MSceneWindow::resizeEvent(aEvent);
CheckTopLevelSize();
}
virtual bool eventFilter(QObject* watched, QEvent* e)
{
if (e->type() == QEvent::GraphicsSceneResize ||
e->type() == QEvent::GraphicsSceneMove) {
//Do this in next event loop, or we are in recursion!
QTimer::singleShot(0, this, SLOT(CheckTopLevelSize()));
}
return false;
}
private Q_SLOTS:
void CheckTopLevelSize()
{
if (mTopLevelWidget) {
qreal xpos = 0;
qreal ypos = 0;
qreal width = mCurrentSize.width();
qreal height = mCurrentSize.height();
// transfer new size to graphics widget if changed
QRectF r = mTopLevelWidget->geometry();
if (r != QRectF(xpos, ypos, width, height)) {
mTopLevelWidget->setGeometry(xpos, ypos, width, height);
}
}
}
void VisibleScreenAreaChanged(const QRect& rect) {
if (mTopLevelWidget) {
mTopLevelWidget->NotifyVKB(rect);
}
}
private:
IMozQWidget* mTopLevelWidget;
QSizeF mCurrentSize;
};
/**
This is a helper class to synchronize the MWindow window with
its contained QGraphicsWidget for things like resizing and closing
by the user.
*/
class MozMGraphicsView : public MWindow
{
Q_OBJECT
public:
MozMGraphicsView(QWidget* aParent = nullptr)
: MWindow(aParent)
, mEventHandler(this)
, mTopLevelWidget(nullptr)
, mSceneWin(nullptr)
{
QObject::connect(this, SIGNAL(switcherEntered()), this, SLOT(onSwitcherEntered()));
QObject::connect(this, SIGNAL(switcherExited()), this, SLOT(onSwitcherExited()));
setFrameShape(QFrame::NoFrame);
}
void SetTopLevel(IMozQWidget* aTopLevel, QWidget* aParent)
{
if (!mSceneWin) {
mSceneWin = new MozMSceneWindow(aTopLevel);
mSceneWin->appear(this);
}
mSceneWin->SetTopLevel(aTopLevel);
mTopLevelWidget = aTopLevel;
}
public Q_SLOTS:
void onSwitcherEntered() {
if (mTopLevelWidget) {
mTopLevelWidget->SwitchToBackground();
}
}
void onSwitcherExited() {
if (mTopLevelWidget) {
mTopLevelWidget->SwitchToForeground();
}
}
protected:
virtual bool event(QEvent* aEvent) {
mEventHandler.handleEvent(aEvent, mTopLevelWidget);
return MWindow::event(aEvent);
}
virtual void resizeEvent(QResizeEvent* aEvent)
{
setSceneRect(viewport()->rect());
MWindow::resizeEvent(aEvent);
}
virtual void closeEvent (QCloseEvent* aEvent)
{
if (!mEventHandler.handleCloseEvent(aEvent, mTopLevelWidget)) {
MWindow::closeEvent(aEvent);
}
}
private:
MozQGraphicsViewEvents mEventHandler;
IMozQWidget* mTopLevelWidget;
MozMSceneWindow* mSceneWin;
};
#endif /* MOZ_ENABLE_MEEGOTOUCH */
#endif