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TQtWidget.cxx
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TQtWidget.cxx
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// @(#)root/qt:$Id$
// Author: Valeri Fine 23/01/2003
/*************************************************************************
* Copyright (C) 1995-2004, Rene Brun and Fons Rademakers. *
* Copyright (C) 2003 by Valeri Fine. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
// Definition of TQtWidget class
// "double-buffere widget
#include <qapplication.h>
#if QT_VERSION >= 0x40000
# include <QFocusEvent>
# include <QPaintEvent>
# include <QKeyEvent>
# include <QShowEvent>
# include <QResizeEvent>
# include <QMouseEvent>
# include <QCustomEvent>
# include <QImage>
# include <QDebug>
#endif /* QT_VERSION */
#include "TQtWidget.h"
#include "TQtTimer.h"
#include "TROOT.h"
#include "TEnv.h"
#include "TRint.h"
#include "TSystem.h"
#include "Getline.h"
#include "TGQt.h"
#include "TCanvas.h"
#include "Buttons.h"
#include <qevent.h>
#include <qpainter.h>
#include <qpixmap.h>
#include <qfileinfo.h>
#ifdef R__QTWIN32
// #include "Windows4Root.h"
#include "TWinNTSystem.h"
#include "Win32Constants.h"
#endif
// Class to adjust buffer within the method scope if needed
////////////////////////////////////////////////////////////////////////////////
TQtWidgetBuffer::TQtWidgetBuffer(const QWidget *w, bool clear)
: fWidget(w),fBuffer(0), fIsImage(clear)
{
if (fIsImage) {
fBuffer = new QImage(fWidget?fWidget->size():QSize(0,0),QImage::Format_ARGB32_Premultiplied);
// ((QImage*)fBuffer)->fill(0);
} else {
fBuffer = new QPixmap(fWidget?fWidget->size():QSize(0,0));
}
}
////////////////////////////////////////////////////////////////////////////////
/// Copy ctor. Create the copy and account the new widget size
TQtWidgetBuffer::TQtWidgetBuffer(const TQtWidgetBuffer &b)
: fWidget(b.fWidget),fBuffer(0), fIsImage(b.fIsImage)
{
if (fWidget && (fWidget->size() != QSize(0,0))) {
if (fIsImage) {
QImage resized =((QImage*)b.fBuffer)->scaled (fWidget->size());
fBuffer = new QImage(resized);
} else {
QPixmap resized =((QPixmap*) b.fBuffer)->scaled (fWidget->size());
fBuffer = new QPixmap(resized);
}
}
}
////////////////////////////////////////////////////////////////////////////////
/// dtor
TQtWidgetBuffer:: ~TQtWidgetBuffer()
{
delete fBuffer;
fBuffer = 0;
}
////////////////////////////////////////////////////////////////////////////////
/// Clear the buffer with the transparent color
void TQtWidgetBuffer::Clear()
{
if (fBuffer && !fIsImage ) {
#ifdef R__WIN32
((QPixmap*)fBuffer)->fill(Qt::transparent);
#else
QPainter p(fBuffer);
p.fillRect(QRect(0,0,fBuffer->width(), fBuffer->height())
,Qt::transparent);
#endif
}
}
//___________________________________________________________________
ClassImp(TQtWidget);
////////////////////////////////////////////////////////////////////////////////
//
// TQtWidget is a QWidget with the QPixmap double buffer
// It is designed to back the ROOT TCanvasImp class interface and it can be used
// as a regular Qt Widget to create Qt-based GUI with the embedded TCanvas objects
//
// This widget can be used as a Qt "custom widget"
// to build a custom GUI interfaces with Qt Designer
//
// The class emits the Qt signals and has Qt public slots
//
// Public slots: (Qt)
//
// virtual void cd(); // make the associated TCanvas the current one (shortcut to TCanvas::cd())
// virtual void cd(int subpadnumber); // as above - shortcut to Canvas::cd(int subpadnumber)
// void Disconnect(); // disconnect the QWidget from the ROOT TCanvas (used in the class dtor)
// void Refresh(); // force the associated TCanvas::Update to be called
// virtual bool Save(const QString &fileName) const; // Save the widget image with some ppixmap file
// virtual bool Save(const char *fileName) const;
// virtual bool Save(const QString &fileName,const char *format,int quality=60) const;
// virtual bool Save(const char *fileName,const char *format,int quality=60) const;
//
// signals (Qt)
//
// CanvasPainted(); // Signal the TCanvas has been painted onto the screen
// Saved(bool ok); // Signal the TCanvas has been saved into the file
// RootEventProcessed(TObject *selected, unsigned int event, TCanvas *c);
// // Signal the Qt mouse/keyboard event has been process by ROOT
// // This "signal" is emitted by the enabled mouse events only.
// // See: EnableSignalEvents
// // --- DisableSignalEvents
//
// public methods:
// The methods below define whether the TQtWidget object emits "RootEventProcessed" Qt signals
// (By default no RootEventProcessed Qt signal is emitted )
// void EnableSignalEvents (UInt_t f)
// void DisableSignalEvents(UInt_t f),
// where f is a bitwise OR of the mouse event flags:
// kMousePressEvent // TCanvas processed QEvent mousePressEvent
// kMouseMoveEvent // TCanvas processed QEvent mouseMoveEvent
// kMouseReleaseEvent // TCanvas processed QEvent mouseReleaseEvent
// kMouseDoubleClickEvent // TCanvas processed QEvent mouseDoubleClickEvent
// kKeyPressEvent // TCanvas processed QEvent keyPressEvent
// kEnterEvent // TCanvas processed QEvent enterEvent
// kLeaveEvent // TCanvas processed QEvent leaveEvent
//
// For example to create the custom responce to the mouse crossing TCanvas
// connect the RootEventProsecced signal with your qt slot:
//
// connect(tQtWidget,SIGNAL(RootEventProcessed(TObject *, unsigned int, TCanvas *))
// ,this,SLOT(CanvasEvent(TObject *, unsigned int, TCanvas *)));
// . . .
//
//void qtrootexample1::CanvasEvent(TObject *obj, unsigned int event, TCanvas *)
//{
// TQtWidget *tipped = (TQtWidget *)sender();
// const char *objectInfo =
// obj->GetObjectInfo(tipped->GetEventX(),tipped->GetEventY());
// QString tipText ="You have ";
// if (tipped == tQtWidget1)
// tipText +="clicked";
// else
// tipText +="passed";
// tipText += " the object <";
// tipText += obj->GetName();
// tipText += "> of class ";
// tipText += obj->ClassName();
// tipText += " : ";
// tipText += objectInfo;
//
// QWhatsThis::display(tipText)
// }
//
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
TQtWidget::TQtWidget(QWidget* mother, const char* name, Qt::WFlags f,bool embedded) :
QWidget(mother,f)
,fBits(0),fNeedStretch(false),fCanvas(0),fPixmapID(0),fPixmapScreen(0)
,fPaint(TRUE),fSizeChanged(FALSE),fDoubleBufferOn(FALSE),fEmbedded(embedded)
,fWrapper(0),fSaveFormat("PNG"),fInsidePaintEvent(false),fOldMousePos(-1,-1)
,fIgnoreLeaveEnter(0),fRefreshTimer(0)
{
if (name && name[0]) setObjectName(name);
Init() ;
}
////////////////////////////////////////////////////////////////////////////////
TQtWidget::TQtWidget(QWidget* mother, Qt::WFlags f,bool embedded) :
QWidget(mother,f)
,fBits(0),fNeedStretch(false),fCanvas(0),fPixmapID(0)
,fPixmapScreen(0),fPaint(TRUE),fSizeChanged(FALSE)
,fDoubleBufferOn(FALSE),fEmbedded(embedded),fWrapper(0),fSaveFormat("PNG")
,fInsidePaintEvent(false),fOldMousePos(-1,-1),fIgnoreLeaveEnter(0),fRefreshTimer(0)
{ setObjectName("tqtwidget"); Init() ;}
////////////////////////////////////////////////////////////////////////////////
void TQtWidget::Init()
{
setFocusPolicy(Qt::WheelFocus);
setAttribute(Qt::WA_NoSystemBackground);
setAutoFillBackground(false);
QPalette p = palette();
p.setBrush(QPalette::Window, Qt::transparent);
setPalette(p);
if (fEmbedded) {
if (!gApplication) InitRint();
int minw = 10;
int minh = 10;
setMinimumSize(minw,minh);
Bool_t batch = gROOT->IsBatch();
if (!batch) gROOT->SetBatch(kTRUE); // to avoid the recursion within TCanvas ctor
TGQt::RegisterWid(this);
fCanvas = new TCanvas(objectName().toStdString().c_str(),minw,minh, TGQt::RegisterWid(this));
gROOT->SetBatch(batch);
// schedule the flush operation fCanvas->Flush(); via timer
Refresh();
}
fSizeHint = QWidget::sizeHint();
setSizePolicy(QSizePolicy(QSizePolicy::MinimumExpanding,QSizePolicy::MinimumExpanding));
#ifdef R__QTWIN32
// Set the application icon for all ROOT widgets
static HICON rootIcon = 0;
if (!rootIcon) {
HICON hIcon = ::LoadIcon(::GetModuleHandle(NULL), MAKEINTRESOURCE(101));
if (!hIcon) hIcon = LoadIcon(NULL, IDI_APPLICATION);
rootIcon = hIcon;
SetClassLong(winId(), // handle to window
GCL_HICON, // index of value to change
LONG(rootIcon) // new value
);
}
#endif
}
////////////////////////////////////////////////////////////////////////////////
TQtWidget::~TQtWidget()
{
TCanvas *c = 0;
// to block the double deleting from
gVirtualX->SelectWindow(-1);
TGQt::UnRegisterWid(this);
if (fEmbedded) {
// one has to set CanvasID = 0 to disconnect things properly.
c = fCanvas;
ResetCanvas();
delete c;
} else {
ResetCanvas();
}
delete fPixmapID; fPixmapID = 0;
delete fPixmapScreen; fPixmapScreen = 0;
}
////////////////////////////////////////////////////////////////////////////////
/// Adjust the widget buffer size
void TQtWidget::AdjustBufferSize()
{
TQtWidgetBuffer &buf = SetBuffer();
QSize s(buf.Width(),buf.Height());
if ( s != size() ) {
#if 0
qDebug() << "TQtWidget::AdjustBufferSize(): "
<< this
<< s << size();
#endif
if (fPixmapID) {
TQtWidgetBuffer *bf = new TQtWidgetBuffer(*fPixmapID);
delete fPixmapID; fPixmapID = bf;
}
if (fPixmapScreen) {
TQtWidgetBuffer *bf = new TQtWidgetBuffer(*fPixmapScreen);
delete fPixmapScreen; fPixmapScreen = bf;
}
}
}
////////////////////////////////////////////////////////////////////////////////
/// Alias for GetCanvas method
TCanvas *TQtWidget::Canvas()
{
return GetCanvas();
}
////////////////////////////////////////////////////////////////////////////////
/// static: return TCanvas by TQtWidget pointer
TCanvas *TQtWidget::Canvas(TQtWidget *widget)
{
return widget ? widget->Canvas() : 0 ;
}
////////////////////////////////////////////////////////////////////////////////
/// static: return the TQtWidget backend for TCanvas *canvas object
TQtWidget *TQtWidget::Canvas(const TCanvas *canvas)
{
return canvas ? Canvas(canvas->GetCanvasID()) : 0;
}
////////////////////////////////////////////////////////////////////////////////
/// static: return TQtWidget by TCanvas id
TQtWidget *TQtWidget::Canvas(Int_t id)
{
return dynamic_cast<TQtWidget *>(TGQt::iwid(id));
}
////////////////////////////////////////////////////////////////////////////////
///
/// Instantiate ROOT from within Qt application if needed
/// Return the TRint pointer
/// Most parametrs are passed to TRint class ctor
///
/// Bool_t prompt = kTRUE; Instantiate ROOT with ROOT command prompt
/// kFALSE; No ROOT prompt. The default for Qt GUI applications
///
/// The prompt option can be defined via ROOT parameter file ".rootrc"
/// .rootrc:
/// . . .
/// Gui.Prompt yes
///
TApplication *TQtWidget::InitRint( Bool_t /*prompt*/, const char *appClassName, int *argc, char **argv,
void *options, int numOptions, Bool_t noLogo)
{
static int localArgc =0;
static char **localArgv =0;
if (!gApplication) {
QStringList args = QCoreApplication::arguments ();
localArgc = argc ? *argc : args.size();
// check the Gui.backend and Factory
TString guiBackend(gEnv->GetValue("Gui.Backend", "native"));
guiBackend.ToLower();
// Enforce Qt-base Gui.Backend and Gui.Factory from within ROOT-based Qt-application
if (!guiBackend.BeginsWith("qt",TString::kIgnoreCase)) {
gEnv->SetValue("Gui.Backend", "qt");
}
TString guiFactory(gEnv->GetValue("Gui.Factory", "native"));
guiFactory.ToLower();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,16,0)
TApplication::NeedGraphicsLibs() ;
#endif
if (!guiFactory.BeginsWith("qt",TString::kIgnoreCase )){
// Check for the extention
char *extLib = gSystem->DynamicPathName("libQtRootGui",kTRUE);
if (extLib) {
gEnv->SetValue("Gui.Factory", "qtgui");
} else {
gEnv->SetValue("Gui.Factory", "qt");
}
delete [] extLib;
}
if (!argc && !argv ) {
localArgv = new char*[args.size()]; // leaking :-(
for (int i = 0; i < args.size(); ++i) {
QString nextarg = args.at(i);
Int_t nchi = nextarg.length()+1;
localArgv[i]= new char[nchi];
memcpy(localArgv[i], nextarg.toAscii().constData(),nchi-1);
localArgv[i][nchi-1]=0;
}
} else {
localArgv = argv;
}
TRint *rint = new TRint(appClassName, &localArgc, localArgv, options,numOptions,noLogo);
// To mimic what TRint::Run(kTRUE) does.
Int_t prompt= gEnv->GetValue("Gui.Prompt", (Int_t)0);
if (prompt) {
Getlinem(kInit, rint->GetPrompt());
} else {
// disable the TTermInputHandler too to avoid the crash under X11
// to get the pure "GUI" application
TSeqCollection* col = gSystem->GetListOfFileHandlers();
TIter next(col);
TFileHandler* o=0;
while ( ( o=(TFileHandler*) next() ) ) {
if ( o->GetFd()== 0 ) {
o->Remove();
break;
}
}
// Remove Ctrl-C, there will be ROOT prompt anyway
gSystem->RemoveSignalHandler(rint->GetSignalHandler());
}
TQtTimer::Create()->start(0);
}
return gApplication;
}
////////////////////////////////////////////////////////////////////////////////
/// Erases the entire widget and its double buffer
void TQtWidget::Erase()
{
SetBuffer();
// buf.fill(this,QPoint(0,0));
if (fPixmapScreen) fPixmapScreen->Clear();
if (fPixmapID) fPixmapID->Clear();
// erase();
}
////////////////////////////////////////////////////////////////////////////////
/// [slot] to make this embedded canvas the current one
void TQtWidget::cd()
{
cd(0);
}
///////////////////////////////////////////////////////////////////////////////
/// [slot] to make this embedded canvas / pad the current one
void TQtWidget::cd(int subpadnumber)
{
TCanvas *c = fCanvas;
if (c) {
c->cd(subpadnumber);
}
}
////////////////////////////////////////////////////////////////////////////////
/// [slot] Disconnect the Qt widget from TCanvas object before deleting
/// to avoid the dead lock
/// one has to set CanvasID = 0 to disconnect things properly.
void TQtWidget::Disconnect()
{
fCanvas = 0;
}
////////////////////////////////////////////////////////////////////////////////
/// [slot] to allow Qt signal refreshing the ROOT TCanvas if needed
/// use the permanent single shot timer to eliminate
/// the redundand refreshing for the sake of the performance
void TQtWidget::Refresh()
{
if (!fRefreshTimer) {
fRefreshTimer = new QTimer(this);
fRefreshTimer->setSingleShot(true);
fRefreshTimer->setInterval(0);
connect(fRefreshTimer, SIGNAL(timeout()), this, SLOT(RefreshCB()));
}
fRefreshTimer->start();
}
////////////////////////////////////////////////////////////////////////////////
/// [slot] to allow Qt signal refreshing the ROOT TCanvas if needed
void TQtWidget::RefreshCB()
{
TCanvas *c = Canvas();
if (c) {
c->Modified();
c->Resize();
c->Update();
}
if (!fInsidePaintEvent) { update(); }
else {
qDebug() << " TQtWidget::Refresh() update inside of paintEvent !!!" << this;
}
}
////////////////////////////////////////////////////////////////////////////////
/// remember my host TCanvas and adopt its name
void TQtWidget::SetCanvas(TCanvas *c)
{
fCanvas = c;
// qDebug() << "TQtWidget::SetCanvas(TCanvas *c)" << fCanvas << fCanvas->GetName() ;
setObjectName(fCanvas->GetName());
}
////////////////////////////////////////////////////////////////////////////////
/// The custom response to the special WIN32 events
/// These events are not present with X11 systems
void
TQtWidget::customEvent(QEvent *e)
{
switch (e->type() - QEvent::User) {
case kEXITSIZEMOVE:
{ // WM_EXITSIZEMOVE
fPaint = TRUE;
exitSizeEvent();
break;
}
case kENTERSIZEMOVE:
{
// WM_ENTERSIZEMOVE
fSizeChanged=FALSE;
fPaint = FALSE;
break;
}
case kFORCESIZE:
default:
{
// Force resize
fPaint = TRUE;
fSizeChanged = TRUE;
exitSizeEvent();
break;
}
};
}
///////////////////////////////////////////////////////////////////////////////
/// The custom response to the Qt QContextMenuEvent
/// Map QContextMenuEvent to the ROOT kButton3Down = 3 event
void TQtWidget::contextMenuEvent(QContextMenuEvent *e)
{
TCanvas *c = Canvas();
if (e && c && (e->reason() != QContextMenuEvent::Mouse) ) {
e->accept();
c->HandleInput(kButton3Down, e->x(), e->y());
}
}
////////////////////////////////////////////////////////////////////////////////
/// The custom response to the Qt QFocusEvent "in"
/// this imposes an extra protection to avoid TObject interaction with
/// mouse event accidently
void TQtWidget::focusInEvent ( QFocusEvent *e )
{
if (!fWrapper && e->gotFocus()) {
setMouseTracking(TRUE);
}
}
////////////////////////////////////////////////////////////////////////////////
/// The custom response to the Qt QFocusEvent "out"
/// this imposes an extra protection to avoid TObject interaction with
/// mouse event accidently
void TQtWidget::focusOutEvent ( QFocusEvent *e )
{
if (!fWrapper && e->lostFocus()) {
setMouseTracking(FALSE);
}
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt mouse press button event to the ROOT TCanvas events
/// Mouse events occur when a mouse button is pressed or released inside
/// a widget or when the mouse cursor is moved.
void TQtWidget::mousePressEvent (QMouseEvent *e)
{
// kButton1Down = 1, kButton2Down = 2, kButton3Down = 3,
EEventType rootButton = kNoEvent;
Qt::ContextMenuPolicy currentPolicy = contextMenuPolicy();
fOldMousePos = e->pos();
TCanvas *c = Canvas();
if (c && !fWrapper ){
switch (e->button ())
{
case Qt::LeftButton: rootButton = kButton1Down; break;
case Qt::RightButton: {
// respect the QWidget::contextMenuPolicy
// treat this event as QContextMenuEvent
if ( currentPolicy == Qt::DefaultContextMenu) {
e->accept();
QContextMenuEvent evt(QContextMenuEvent::Other, e->pos() );
QApplication::sendEvent(this, &evt);
} else {
rootButton = kButton3Down;
}
break;
}
case Qt::MidButton: rootButton = kButton2Down; break;
default: break;
};
if (rootButton != kNoEvent) {
e->accept();
if (rootButton == kButton3Down) {
bool lastvalue = c->TestBit(kNoContextMenu);
c->SetBit(kNoContextMenu);
c->HandleInput(rootButton, e->x(), e->y());
c->SetBit(kNoContextMenu, lastvalue);
} else {
c->HandleInput(rootButton, e->x(), e->y());
}
EmitSignal(kMousePressEvent);
return;
}
} else {
e->ignore();
}
QWidget::mousePressEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt mouse move pointer event to the ROOT TCanvas events
/// kMouseMotion = 51,
/// kButton1Motion = 21, kButton2Motion = 22, kButton3Motion = 23, kKeyPress = 24
void TQtWidget::mouseMoveEvent (QMouseEvent * e)
{
EEventType rootButton = kMouseMotion;
if ( fOldMousePos != e->pos() && fIgnoreLeaveEnter < 2 ) { // workaround of Qt 4.5.x bug
fOldMousePos = e->pos();
TCanvas *c = Canvas();
if (c && !fWrapper){
if (e->buttons() & Qt::LeftButton) { rootButton = kButton1Motion; }
e->accept();
c->HandleInput(rootButton, e->x(), e->y());
EmitSignal(kMouseMoveEvent);
return;
} else {
e->ignore();
}
}
QWidget::mouseMoveEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt mouse button release event to the ROOT TCanvas events
/// kButton1Up = 11, kButton2Up = 12, kButton3Up = 13
void TQtWidget::mouseReleaseEvent(QMouseEvent * e)
{
EEventType rootButton = kNoEvent;
fOldMousePos = QPoint(-1,-1);
TCanvas *c = Canvas();
if (c && !fWrapper){
switch (e->button())
{
case Qt::LeftButton: rootButton = kButton1Up; break;
case Qt::RightButton: rootButton = kButton3Up; break;
case Qt::MidButton: rootButton = kButton2Up; break;
default: break;
};
if (rootButton != kNoEvent) {
e->accept();
c->HandleInput(rootButton, e->x(), e->y());
gPad->Modified();
EmitSignal(kMouseReleaseEvent);
return;
}
} else {
e->ignore();
}
QWidget::mouseReleaseEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt mouse double click button event to the ROOT TCanvas events
/// kButton1Double = 61, kButton2Double = 62, kButton3Double = 63
void TQtWidget::mouseDoubleClickEvent(QMouseEvent * e)
{
EEventType rootButton = kNoEvent;
TCanvas *c = Canvas();
if (c && !fWrapper){
switch (e->button())
{
case Qt::LeftButton: rootButton = kButton1Double; break;
case Qt::RightButton: rootButton = kButton3Double; break;
case Qt::MidButton: rootButton = kButton2Double; break;
default: break;
};
if (rootButton != kNoEvent) {
e->accept();
c->HandleInput(rootButton, e->x(), e->y());
EmitSignal(kMouseDoubleClickEvent);return;
}
} else {
e->ignore();
}
QWidget::mouseDoubleClickEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt key press event to the ROOT TCanvas events
/// kKeyDown = 4
void TQtWidget::keyPressEvent(QKeyEvent * e)
{
TCanvas *c = Canvas();
if (c && !fWrapper){
c->HandleInput(kKeyPress, e->text().toStdString().c_str()[0], e->key());
EmitSignal(kKeyPressEvent);
} else {
e->ignore();
}
QWidget::keyPressEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt key release event to the ROOT TCanvas events
/// kKeyUp = 14
void TQtWidget::keyReleaseEvent(QKeyEvent * e)
{
QWidget::keyReleaseEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt mouse enters widget event to the ROOT TCanvas events
/// kMouseEnter = 52
void TQtWidget::enterEvent(QEvent *e)
{
TCanvas *c = Canvas();
if (c && !fIgnoreLeaveEnter && !fWrapper){
c->HandleInput(kMouseEnter, 0, 0);
EmitSignal(kEnterEvent);
}
QWidget::enterEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// Map the Qt mouse leaves widget event to the ROOT TCanvas events
/// kMouseLeave = 53
void TQtWidget::leaveEvent (QEvent *e)
{
TCanvas *c = Canvas();
if (c && !fIgnoreLeaveEnter && !fWrapper){
c->HandleInput(kMouseLeave, 0, 0);
EmitSignal(kLeaveEvent);
}
QWidget::leaveEvent(e);
}
////////////////////////////////////////////////////////////////////////////////
/// The widget will be erased and receive a paint event immediately after
/// processing the resize event.
/// No drawing need be (or should be) done inside this handler.
void TQtWidget::resizeEvent(QResizeEvent *e)
{
if (!e) return;
if (topLevelWidget()->isMinimized()) { fSizeChanged=FALSE; }
else if (topLevelWidget()->isMaximized ()){
fSizeChanged=TRUE;
exitSizeEvent();
fSizeChanged=TRUE;
} else {
#ifdef R__QTWIN32
if (!fPaint) {
// real resize event
fSizeChanged=TRUE;
fNeedStretch=true;
} else {
#else
{
fSizeChanged=TRUE;
#if 0
if (Qt::LeftButton == QApplication::mouseButtons())
{
fNeedStretch=true;
fPaint = false;
} else
#endif
{
fPaint = kTRUE;
exitSizeEvent();
}
#endif
} }
}
////////////////////////////////////////////////////////////////////////////////
/// Set the default save format for the widget
void TQtWidget::SetSaveFormat(const char *format)
{
fSaveFormat = TGQt::QtFileFormat(format);
}
////////////////////////////////////////////////////////////////////////////////
///
/// TQtWidget::Save(const QString &fileName) is a public Qt slot.
/// it saves the double buffer of this object using the default save
/// format defined the file extension
/// If the "fileName" has no extension the "default" format is to be used instead
/// The default format is "PNG".
/// It can be changed with the TQtWidget::SetSaveFormat method
///
bool TQtWidget::Save(const char *fileName) const
{
return Save(QString(fileName));
}
////////////////////////////////////////////////////////////////////////////////
///
/// TQtWidget::Save(const QString &fileName) is a public Qt slot.
/// it saves the double buffer of this object using the default save
/// format defined the file extension
/// If the "fileName" has no extension the "default" format is to be used instead
/// The default format is "PNG".
/// It can be changed with the TQtWidget::SetSaveFormat method
///
bool TQtWidget::Save(const QString &fileName) const
{
QString fileNameExtension = QFileInfo(fileName).suffix().toUpper();
QString saveFormat;
if (fileNameExtension.isEmpty() ) {
saveFormat = fSaveFormat; // this is default
} else {
saveFormat = TGQt::QtFileFormat(fileNameExtension);
}
return Save(fileName,saveFormat.toStdString().c_str());
}
////////////////////////////////////////////////////////////////////////////////
bool TQtWidget::Save(const char *fileName,const char *format,int quality)const
{
return Save(QString(fileName),format,quality);
}
////////////////////////////////////////////////////////////////////////////////
/// TQtWidget::save is a public Qt slot.
/// it saves the double buffer of this object using QPixmap facility
bool TQtWidget::Save(const QString &fileName,const char *format,int quality)const
{
bool Ok = false;
bool rootFormatFound=kTRUE;
QString saveType = TGQt::RootFileFormat(format);
if (saveType.isEmpty() ) {
rootFormatFound = false;
saveType = TGQt::QtFileFormat(format);
}
TCanvas *c = GetCanvas();
if (rootFormatFound && c) {
c->Print(fileName.toStdString().c_str(),saveType.toStdString().c_str());
Ok = true;
} else if (GetOffScreenBuffer()) {
// Since the "+" is a legal part of the file name and it is used by Onuchin
// to indicate the "animation" mode, we have to proceed very carefully
int dot = fileName.lastIndexOf('.');
int plus = 0;
if (dot > -1) {
plus = fileName.indexOf('+',dot+1);
}
QString fln = (plus > -1) ? TGQt::GetNewFileName(fileName.left(plus)) : fileName;
if (fCanvasDecorator.isNull()) {
Ok = GetOffScreenBuffer()->save(fln,saveType.toStdString().c_str(),quality);
} else {
/// add decoration
}
}
emit ((TQtWidget *)this)->Saved(Ok);
return Ok;
}
////////////////////////////////////////////////////////////////////////////////
/// Set the double buffered mode on/off
void TQtWidget::SetDoubleBuffer(bool on)
{
if (fDoubleBufferOn != on ) {
fDoubleBufferOn = on;
if (on) SetBuffer();
}
}
////////////////////////////////////////////////////////////////////////////////
/// Stretch the widget during sizing
void TQtWidget::stretchWidget(QResizeEvent * /*s*/)
{
if (!paintingActive() && fPixmapID) {
QPainter pnt(this);
pnt.drawPixmap(rect(),*GetOffScreenBuffer());
}
fNeedStretch = false;
}
////////////////////////////////////////////////////////////////////////////////
/// Response to the "exit size event"
void TQtWidget::exitSizeEvent ()
{
if (!fSizeChanged ) return;
{
AdjustBufferSize();
}
//Refresh();
TCanvas *c = Canvas();
if (c) c->Resize();
// One more time to catch the last size
Refresh();
}
////////////////////////////////////////////////////////////////////////////////
/// Set new fPaint flag
/// Returns: the previous version of the flag
bool TQtWidget::paintFlag(bool mode)
{
bool flag = fPaint;
fPaint = mode;
return flag;
}
////////////////////////////////////////////////////////////////////////////////
/// Custom handler of the Qt show event
/// Non-spontaneous show events are sent to widgets immediately before
/// they are shown.
/// The spontaneous show events of top-level widgets are delivered afterwards.
void TQtWidget::showEvent ( QShowEvent *)
{
TQtWidgetBuffer &buf = SetBuffer();
QSize s(buf.Width(),buf.Height());
if (s != size() )
{
fSizeChanged = kTRUE;
exitSizeEvent();
}
}
////////////////////////////////////////////////////////////////////////////////
/// Custom handler of the Qt paint event
/// A paint event is a request to repaint all or part of the widget.
/// It can happen as a result of repaint() or update(), or because the widget
/// was obscured and has now been uncovered, or for many other reasons.
void TQtWidget::paintEvent (QPaintEvent *e)
{
fInsidePaintEvent = true;
if (fNeedStretch) {
stretchWidget((QResizeEvent *)0);
} else {
#ifdef R__QTWIN32
TQtWidgetBuffer &buf = SetBuffer();
QSize s(buf.Width(),buf.Height());
if ( fEmbedded && (s != size()) )
{
fSizeChanged = kTRUE;
exitSizeEvent();
fInsidePaintEvent = false;
return;
}
#endif
QRegion region = e->region();
if ( ( fPaint && !region.isEmpty() ) )
{
// fprintf(stderr,"TQtWidget::paintEvent: window = %p; buffer = %p\n",
// (QPaintDevice *)this, (QPaintDevice *)&GetBuffer());
// qDebug() << "1. TQtWidget::paintEvent this =" << (QPaintDevice *)this << " buffer = " << fPixmapID << "redirected = " << QPainter::redirected(this)
// <<" IsDoubleBuffered()=" << IsDoubleBuffered() ;
// qDebug() << "2. TQtWidget::paintEvent this =" << (QPaintDevice *)this << " buffer = " << fPixmapID << " IsDoubleBuffered()=" << IsDoubleBuffered() ;
QPainter screen(this);
screen.setClipRegion(region);
// paint the the TCanvas double buffer
if (fPixmapID) screen.drawPixmap(0,0,*GetOffScreenBuffer());
if (!fCanvasDecorator.isNull()) fCanvasDecorator->paintEvent(screen,e);
}
}
fInsidePaintEvent = false;
}
// Layout methods:
////////////////////////////////////////////////////////////////////////////////
/// sets the preferred size of the widget.
void TQtWidget::SetSizeHint (const QSize &sz) {
fSizeHint = sz;
}
////////////////////////////////////////////////////////////////////////////////
/// returns the preferred size of the widget.
QSize TQtWidget::sizeHint () const{
return QWidget::sizeHint();
}
////////////////////////////////////////////////////////////////////////////////
/// returns the smallest size the widget can have.
QSize TQtWidget::minimumSizeHint () const{
return QWidget::minimumSizeHint ();
}
////////////////////////////////////////////////////////////////////////////////
/// returns a QSizePolicy; a value describing the space requirements
QSizePolicy TQtWidget::sizePolicy () const{
return QWidget::sizePolicy ();
}
////////////////////////////////////////////////////////////////////////////////
void TQtWidget::EmitTestedSignal()
{
TCanvas *c = GetCanvas();
TObject *selected = GetSelected();
UInt_t evt = GetEvent();
emit RootEventProcessed(selected, evt, c);
}
////////////////////////////////////////////////////////////////////////////////
/// Set or unset the user status bits as specified in f.
void TQtWidget::SetBit(UInt_t f, Bool_t set)
{
if (set)
SetBit(f);
else
ResetBit(f);