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/*********
*
* This file is part of BibleTime's source code, http://www.bibletime.info/.
*
* Copyright 1999-2008 by the BibleTime developers.
* The BibleTime source code is licensed under the GNU General Public License version 2.0.
*
**********/
#include "cmdiarea.h"
//QT includes
#include <QTimer>
#include <QEvent>
#include <QWindowStateChangeEvent>
#include <QMdiSubWindow>
#include <QDebug>
CMDIArea::CMDIArea(QWidget *parent) : QMdiArea(parent),
m_mdiArrangementMode(ArrangementModeManual) {
setActivationOrder( CreationOrder ); //keep window order consistent
connect(this, SIGNAL(subWindowActivated(QMdiSubWindow*)), this, SLOT(slotClientActivated(QMdiSubWindow*)));
}
QMdiSubWindow* CMDIArea::addSubWindow(QWidget * widget, Qt::WindowFlags windowFlags) {
QMdiSubWindow* subWindow = QMdiArea::addSubWindow(widget, windowFlags);
subWindow->installEventFilter(this);
//If we do have a maximized Window, set it to normal so that the new window can be seen
if (activeSubWindow() && activeSubWindow()->isMaximized()) {
activeSubWindow()->showNormal();
}
if (m_mdiArrangementMode == ArrangementModeManual) {
subWindow->resize(400, 400); //set the window to be big enough
subWindow->raise();
}
else {
triggerWindowUpdate();
}
return subWindow;
}
void CMDIArea::deleteAll() {
closeAllSubWindows();
}
void CMDIArea::setMDIArrangementMode( const MDIArrangementMode newArrangementMode ) {
m_mdiArrangementMode = newArrangementMode;
triggerWindowUpdate();
}
CMDIArea::MDIArrangementMode CMDIArea::getMDIArrangementMode(void) const {
return m_mdiArrangementMode;
}
void CMDIArea::myTileVertical() {
if (!updatesEnabled() || !usableWindowList().count() ) {
return;
}
QList<QMdiSubWindow*> windows = usableWindowList();
if (activeSubWindow() && activeSubWindow()->isMaximized()) {
if (activeSubWindow()->size() != this->size()) {
activeSubWindow()->resize(this->size());
}
}
else if (windows.count() == 1) {
windows.at(0)->showMaximized();
}
else {
setUpdatesEnabled(false);
QMdiSubWindow* active = activeSubWindow();
QMdiArea::tileSubWindows();
if (active) active->setFocus();
setUpdatesEnabled(true);
}
emitWindowCaptionChanged();
}
void CMDIArea::myTileHorizontal() {
if (!updatesEnabled() || !usableWindowList().count() ) {
return;
}
QList<QMdiSubWindow*> windows = usableWindowList();
if (activeSubWindow() && activeSubWindow()->isMaximized()) {
if (activeSubWindow()->size() != this->size()) {
activeSubWindow()->resize(this->size());
}
}
else if (windows.count() == 1) {
windows.at(0)->showMaximized();
}
else {
setUpdatesEnabled(false);
QMdiSubWindow* active = activeSubWindow();
const int heightForEach = height() / windows.count();
unsigned int y = 0;
foreach (QMdiSubWindow *window, windows) {
window->showNormal();
const int preferredHeight = window->minimumHeight() + window->baseSize().height();
const int actHeight = qMax(heightForEach, preferredHeight);
window->setGeometry( 0, y, width(), actHeight );
y += actHeight;
}
active->setFocus();
setUpdatesEnabled(true);
}
emitWindowCaptionChanged();
}
void CMDIArea::myCascade() {
if (!updatesEnabled() || !usableWindowList().count() ) {
return;
}
QList<QMdiSubWindow*> windows = usableWindowList();
if (activeSubWindow() && activeSubWindow()->isMaximized()) {
if (activeSubWindow()->size() != this->size()) {
activeSubWindow()->resize(this->size());
}
}
else if (windows.count() == 1) {
windows.at(0)->showMaximized();
}
else {
setUpdatesEnabled(false);
QMdiSubWindow* active = activeSubWindow();
const unsigned int offsetX = 40;
const unsigned int offsetY = 40;
const unsigned int windowWidth = width() - (windows.count() - 1) * offsetX;
const unsigned int windowHeight = height() - (windows.count() - 1) * offsetY;
unsigned int x = 0;
unsigned int y = 0;
foreach (QMdiSubWindow* window, windows) {
if (window == active) { //leave out the active window which should be the top window
continue;
}
window->raise(); //make it the on-top-of-window-stack window to make sure they're in the right order
window->setGeometry(x, y, windowWidth, windowHeight);
x += offsetX;
y += offsetY;
}
active->setGeometry(x, y, windowWidth, windowHeight);
active->raise();
active->activateWindow();
setUpdatesEnabled(true);
}
emitWindowCaptionChanged();
}
void CMDIArea::emitWindowCaptionChanged() {
QString appCaption;
if (activeSubWindow()) {
appCaption = activeSubWindow()->windowTitle();
}
emit sigSetToplevelCaption(appCaption);
}
QList<QMdiSubWindow*> CMDIArea::usableWindowList() {
//Take care: when new windows are added, they will not appear
//in subWindowList() when their ChildAdded-Event is triggered
QList<QMdiSubWindow*> ret;
foreach(QMdiSubWindow* w, subWindowList()) {
if (w->isMinimized() || w->isHidden()) { //not usable for us
continue;
}
ret.append( w );
}
return ret;
}
void CMDIArea::slotClientActivated(QMdiSubWindow* client) {
if (!client || !updatesEnabled()) {
return;
}
emit sigSetToplevelCaption( client->windowTitle().trimmed() );
}
//resize event of the MDI area itself, update layout if necessary
void CMDIArea::resizeEvent(QResizeEvent* /*e*/) {
//do not call QMdiArea::resizeEvent(e), this would mess up our layout
if (updatesEnabled()) triggerWindowUpdate();
}
//handle events of the client windows to update layout if necessary
bool CMDIArea::eventFilter(QObject *o, QEvent *e) {
QMdiSubWindow* w = dynamic_cast<QMdiSubWindow*>(o);
if (!w) return false; //let the event be handled by other filters too
if (e->type() == QEvent::WindowStateChange) {
Qt::WindowStates newState = w->windowState();
Qt::WindowStates oldState = ((QWindowStateChangeEvent*)e)->oldState();
//Do not handle window activation or deactivation here, it will produce wrong
//results because this event is handled too early. Let slotClientActivated() handle this.
bool needsLayoutUpdate = false;
//Window was maximized or un-maximized
if ((newState ^ oldState) & Qt::WindowMaximized) needsLayoutUpdate = true;
//Window was minimized or de-minimized
if ((newState ^ oldState) & Qt::WindowMinimized) needsLayoutUpdate = true;
//update Layout?
if (needsLayoutUpdate) triggerWindowUpdate();
}
if (e->type() == QEvent::Close) {
triggerWindowUpdate();
}
return false; //let the event be handled by other filters too
}
void CMDIArea::triggerWindowUpdate() {
if (updatesEnabled()) {
switch (m_mdiArrangementMode) {
case ArrangementModeTileVertical:
QTimer::singleShot(0, this, SLOT(myTileVertical()));
break;
case ArrangementModeTileHorizontal:
QTimer::singleShot(0, this, SLOT(myTileHorizontal()));
break;
case ArrangementModeCascade:
QTimer::singleShot(0, this, SLOT(myCascade()));
break;
default:
break;
}
}
}
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