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Diffstat (limited to 'src/gui/dialogs/qdialog.cpp')
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diff --git a/src/gui/dialogs/qdialog.cpp b/src/gui/dialogs/qdialog.cpp new file mode 100644 index 0000000..14d8162 --- /dev/null +++ b/src/gui/dialogs/qdialog.cpp @@ -0,0 +1,1159 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qdialog.h" + + +#include "qevent.h" +#include "qdesktopwidget.h" +#include "qpushbutton.h" +#include "qapplication.h" +#include "qlayout.h" +#include "qsizegrip.h" +#include "qwhatsthis.h" +#include "qmenu.h" +#include "qcursor.h" +#include "private/qdialog_p.h" +#ifndef QT_NO_ACCESSIBILITY +#include "qaccessible.h" +#endif +#if defined(Q_OS_WINCE) +#include "qt_windows.h" +#include "qmenubar.h" +#include "qpointer.h" +#include "qguifunctions_wince.h" +extern bool qt_wince_is_mobile(); //defined in qguifunctions_wce.cpp +extern bool qt_wince_is_smartphone(); //is defined in qguifunctions_wce.cpp +#elif defined(Q_WS_X11) +# include "../kernel/qt_x11_p.h" +#endif + +#ifndef SPI_GETSNAPTODEFBUTTON +# define SPI_GETSNAPTODEFBUTTON 95 +#endif + +QT_BEGIN_NAMESPACE + +/*! + \class QDialog + \brief The QDialog class is the base class of dialog windows. + + \ingroup dialogs + \ingroup abstractwidgets + \mainclass + + A dialog window is a top-level window mostly used for short-term + tasks and brief communications with the user. QDialogs may be + modal or modeless. QDialogs can + provide a \link #return return + value\endlink, and they can have \link #default default + buttons\endlink. QDialogs can also have a QSizeGrip in their + lower-right corner, using setSizeGripEnabled(). + + Note that QDialog (an any other widget that has type Qt::Dialog) uses + the parent widget slightly differently from other classes in Qt. A + dialog is always a top-level widget, but if it has a parent, its + default location is centered on top of the parent's top-level widget + (if it is not top-level itself). It will also share the parent's + taskbar entry. + + Use the overload of the QWidget::setParent() function to change + the ownership of a QDialog widget. This function allows you to + explicitly set the window flags of the reparented widget; using + the overloaded function will clear the window flags specifying the + window-system properties for the widget (in particular it will + reset the Qt::Dialog flag). + + \section1 Modal Dialogs + + A \bold{modal} dialog is a dialog that blocks input to other + visible windows in the same application. Dialogs that are used to + request a file name from the user or that are used to set + application preferences are usually modal. Dialogs can be + \l{Qt::ApplicationModal}{application modal} (the default) or + \l{Qt::WindowModal}{window modal}. + + When an application modal dialog is opened, the user must finish + interacting with the dialog and close it before they can access + any other window in the application. Window modal dialogs only + block access to the window associated with the dialog, allowing + the user to continue to use other windows in an application. + + The most common way to display a modal dialog is to call its + exec() function. When the user closes the dialog, exec() will + provide a useful \link #return return value\endlink. Typically, + to get the dialog to close and return the appropriate value, we + connect a default button, e.g. \gui OK, to the accept() slot and a + \gui Cancel button to the reject() slot. + Alternatively you can call the done() slot with \c Accepted or + \c Rejected. + + An alternative is to call setModal(true) or setWindowModality(), + then show(). Unlike exec(), show() returns control to the caller + immediately. Calling setModal(true) is especially useful for + progress dialogs, where the user must have the ability to interact + with the dialog, e.g. to cancel a long running operation. If you + use show() and setModal(true) together to perform a long operation, + you must call QApplication::processEvents() periodically during + processing to enable the user to interact with the dialog. (See + QProgressDialog.) + + \section1 Modeless Dialogs + + A \bold{modeless} dialog is a dialog that operates + independently of other windows in the same application. Find and + replace dialogs in word-processors are often modeless to allow the + user to interact with both the application's main window and with + the dialog. + + Modeless dialogs are displayed using show(), which returns control + to the caller immediately. + + If you invoke the \l{QWidget::show()}{show()} function after hiding + a dialog, the dialog will be displayed in its original position. This is + because the window manager decides the position for windows that + have not been explicitly placed by the programmer. To preserve the + position of a dialog that has been moved by the user, save its position + in your \l{QWidget::closeEvent()}{closeEvent()} handler and then + move the dialog to that position, before showing it again. + + \target default + \section1 Default Button + + A dialog's \e default button is the button that's pressed when the + user presses Enter (Return). This button is used to signify that + the user accepts the dialog's settings and wants to close the + dialog. Use QPushButton::setDefault(), QPushButton::isDefault() + and QPushButton::autoDefault() to set and control the dialog's + default button. + + \target escapekey + \section1 Escape Key + + If the user presses the Esc key in a dialog, QDialog::reject() + will be called. This will cause the window to close: The \link + QCloseEvent close event \endlink cannot be \link + QCloseEvent::ignore() ignored \endlink. + + \section1 Extensibility + + Extensibility is the ability to show the dialog in two ways: a + partial dialog that shows the most commonly used options, and a + full dialog that shows all the options. Typically an extensible + dialog will initially appear as a partial dialog, but with a + \gui More toggle button. If the user presses the \gui More button down, + the dialog is expanded. The \l{Extension Example} shows how to achieve + extensible dialogs using Qt. + + \target return + \section1 Return Value (Modal Dialogs) + + Modal dialogs are often used in situations where a return value is + required, e.g. to indicate whether the user pressed \gui OK or + \gui Cancel. A dialog can be closed by calling the accept() or the + reject() slots, and exec() will return \c Accepted or \c Rejected + as appropriate. The exec() call returns the result of the dialog. + The result is also available from result() if the dialog has not + been destroyed. + + In order to modify your dialog's close behavior, you can reimplement + the functions accept(), reject() or done(). The + \l{QWidget::closeEvent()}{closeEvent()} function should only be + reimplemented to preserve the dialog's position or to override the + standard close or reject behavior. + + \target examples + \section1 Code Examples + + A modal dialog: + + \snippet doc/src/snippets/dialogs/dialogs.cpp 1 + + A modeless dialog: + + \snippet doc/src/snippets/dialogs/dialogs.cpp 0 + + \sa QDialogButtonBox, QTabWidget, QWidget, QProgressDialog, + {fowler}{GUI Design Handbook: Dialogs, Standard}, {Extension Example}, + {Standard Dialogs Example} +*/ + +/*! \enum QDialog::DialogCode + + The value returned by a modal dialog. + + \value Accepted + \value Rejected +*/ + +/*! + \property QDialog::sizeGripEnabled + \brief whether the size grip is enabled + + A QSizeGrip is placed in the bottom-right corner of the dialog when this + property is enabled. By default, the size grip is disabled. +*/ + + +/*! + Constructs a dialog with parent \a parent. + + A dialog is always a top-level widget, but if it has a parent, its + default location is centered on top of the parent. It will also + share the parent's taskbar entry. + + The widget flags \a f are passed on to the QWidget constructor. + If, for example, you don't want a What's This button in the title bar + of the dialog, pass Qt::WindowTitleHint | Qt::WindowSystemMenuHint in \a f. + + \sa QWidget::setWindowFlags() +*/ + +QDialog::QDialog(QWidget *parent, Qt::WindowFlags f) + : QWidget(*new QDialogPrivate, parent, + f | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0)) +{ +#ifdef Q_OS_WINCE + if (!qt_wince_is_smartphone()) + setWindowFlags(windowFlags() | Qt::WindowOkButtonHint | QFlag(qt_wince_is_mobile() ? 0 : Qt::WindowCancelButtonHint)); +#endif +} + +#ifdef QT3_SUPPORT +/*! + \overload + \obsolete +*/ +QDialog::QDialog(QWidget *parent, const char *name, bool modal, Qt::WindowFlags f) + : QWidget(*new QDialogPrivate, parent, + f + | QFlag(modal ? Qt::WShowModal : 0) + | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0) + ) +{ + setObjectName(QString::fromAscii(name)); +} +#endif + +/*! + \overload + \internal +*/ +QDialog::QDialog(QDialogPrivate &dd, QWidget *parent, Qt::WindowFlags f) + : QWidget(dd, parent, f | QFlag((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : 0)) +{ +#ifdef Q_OS_WINCE + if (!qt_wince_is_smartphone()) + setWindowFlags(windowFlags() | Qt::WindowOkButtonHint | QFlag(qt_wince_is_mobile() ? 0 : Qt::WindowCancelButtonHint)); +#endif +} + +/*! + Destroys the QDialog, deleting all its children. +*/ + +QDialog::~QDialog() +{ + // Need to hide() here, as our (to-be) overridden hide() + // will not be called in ~QWidget. + hide(); +} + +/*! + \internal + This function is called by the push button \a pushButton when it + becomes the default button. If \a pushButton is 0, the dialogs + default default button becomes the default button. This is what a + push button calls when it loses focus. +*/ +void QDialogPrivate::setDefault(QPushButton *pushButton) +{ + Q_Q(QDialog); + bool hasMain = false; + QList<QPushButton*> list = qFindChildren<QPushButton*>(q); + for (int i=0; i<list.size(); ++i) { + QPushButton *pb = list.at(i); + if (pb->window() == q) { + if (pb == mainDef) + hasMain = true; + if (pb != pushButton) + pb->setDefault(false); + } + } + if (!pushButton && hasMain) + mainDef->setDefault(true); + if (!hasMain) + mainDef = pushButton; +} + +/*! + \internal + This function sets the default default push button to \a pushButton. + This function is called by QPushButton::setDefault(). +*/ +void QDialogPrivate::setMainDefault(QPushButton *pushButton) +{ + mainDef = 0; + setDefault(pushButton); +} + +/*! + \internal + Hides the default button indicator. Called when non auto-default + push button get focus. + */ +void QDialogPrivate::hideDefault() +{ + Q_Q(QDialog); + QList<QPushButton*> list = qFindChildren<QPushButton*>(q); + for (int i=0; i<list.size(); ++i) { + list.at(i)->setDefault(false); + } +} + +void QDialogPrivate::resetModalitySetByOpen() +{ + Q_Q(QDialog); + if (resetModalityTo != -1 && !q->testAttribute(Qt::WA_SetWindowModality)) { + // open() changed the window modality and the user didn't touch it afterwards; restore it + q->setWindowModality(Qt::WindowModality(resetModalityTo)); + q->setAttribute(Qt::WA_SetWindowModality, wasModalitySet); +#ifdef Q_WS_MAC + Q_ASSERT(resetModalityTo != Qt::WindowModal); + q->setParent(q->parentWidget(), Qt::Dialog); +#endif + } + resetModalityTo = -1; +} + +#ifdef Q_OS_WINCE +#ifdef Q_OS_WINCE_WM +void QDialogPrivate::_q_doneAction() +{ + //Done... + QApplication::postEvent(q_func(), new QEvent(QEvent::OkRequest)); +} +#endif + +/*! + \reimp +*/ +bool QDialog::event(QEvent *e) +{ + bool result = QWidget::event(e); + if (e->type() == QEvent::OkRequest) { + accept(); + result = true; + } + return result; +} +#endif + +/*! + Returns the modal dialog's result code, \c Accepted or \c Rejected. + + Do not call this function if the dialog was constructed with the + Qt::WA_DeleteOnClose attribute. +*/ +int QDialog::result() const +{ + Q_D(const QDialog); + return d->rescode; +} + +/*! + \fn void QDialog::setResult(int i) + + Sets the modal dialog's result code to \a i. + + \note We recommend that you use one of the values defined by + QDialog::DialogCode. +*/ +void QDialog::setResult(int r) +{ + Q_D(QDialog); + d->rescode = r; +} + +/*! + \since 4.5 + + Shows the dialog as a \l{QDialog#Modal Dialogs}{window modal dialog}, + returning immediately. + + \sa exec(), show(), result(), setWindowModality() +*/ +void QDialog::open() +{ + Q_D(QDialog); + + Qt::WindowModality modality = windowModality(); + if (modality != Qt::WindowModal) { + d->resetModalityTo = modality; + d->wasModalitySet = testAttribute(Qt::WA_SetWindowModality); + setWindowModality(Qt::WindowModal); + setAttribute(Qt::WA_SetWindowModality, false); +#ifdef Q_WS_MAC + setParent(parentWidget(), Qt::Sheet); +#endif + } + + setResult(0); + show(); +} + +/*! + Shows the dialog as a \l{QDialog#Modal Dialogs}{modal dialog}, + blocking until the user closes it. The function returns a \l + DialogCode result. + + If the dialog is \l{Qt::ApplicationModal}{application modal}, users cannot + interact with any other window in the same application until they close + the dialog. If the dialog is \l{Qt::ApplicationModal}{window modal}, only + interaction with the parent window is blocked while the dialog is open. + By default, the dialog is application modal. + + \sa open(), show(), result(), setWindowModality() +*/ + +int QDialog::exec() +{ + Q_D(QDialog); + + if (d->eventLoop) { + qWarning("QDialog::exec: Recursive call detected"); + return -1; + } + + bool deleteOnClose = testAttribute(Qt::WA_DeleteOnClose); + setAttribute(Qt::WA_DeleteOnClose, false); + + d->resetModalitySetByOpen(); + + bool wasShowModal = testAttribute(Qt::WA_ShowModal); + setAttribute(Qt::WA_ShowModal, true); + setResult(0); + +//On Windows Mobile we create an empty menu to hide the current menu +#ifdef Q_OS_WINCE_WM +#ifndef QT_NO_MENUBAR + QMenuBar *menuBar = 0; + if (!findChild<QMenuBar *>()) + menuBar = new QMenuBar(this); + if (qt_wince_is_smartphone()) { + QAction *doneAction = new QAction(tr("Done"), this); + menuBar->setDefaultAction(doneAction); + connect(doneAction, SIGNAL(triggered()), this, SLOT(_q_doneAction())); + } +#endif //QT_NO_MENUBAR +#endif //Q_OS_WINCE_WM + + show(); + +#ifdef Q_WS_MAC + d->mac_nativeDialogModalHelp(); +#endif + + QEventLoop eventLoop; + d->eventLoop = &eventLoop; + QPointer<QDialog> guard = this; + (void) eventLoop.exec(QEventLoop::DialogExec); + if (guard.isNull()) + return QDialog::Rejected; + d->eventLoop = 0; + + setAttribute(Qt::WA_ShowModal, wasShowModal); + + int res = result(); + if (deleteOnClose) + delete this; +#ifdef Q_OS_WINCE_WM +#ifndef QT_NO_MENUBAR + else if (menuBar) + delete menuBar; +#endif //QT_NO_MENUBAR +#endif //Q_OS_WINCE_WM + return res; +} + + +/*! + Closes the dialog and sets its result code to \a r. If this dialog + is shown with exec(), done() causes the local event loop to finish, + and exec() to return \a r. + + As with QWidget::close(), done() deletes the dialog if the + Qt::WA_DeleteOnClose flag is set. If the dialog is the application's + main widget, the application terminates. If the dialog is the + last window closed, the QApplication::lastWindowClosed() signal is + emitted. + + \sa accept(), reject(), QApplication::activeWindow(), QApplication::quit() +*/ + +void QDialog::done(int r) +{ + Q_D(QDialog); + hide(); + setResult(r); + + d->close_helper(QWidgetPrivate::CloseNoEvent); + d->resetModalitySetByOpen(); + + emit finished(r); + if (r == Accepted) + emit accepted(); + else if (r == Rejected) + emit rejected(); +} + +/*! + Hides the modal dialog and sets the result code to \c Accepted. + + \sa reject() done() +*/ + +void QDialog::accept() +{ + done(Accepted); +} + +/*! + Hides the modal dialog and sets the result code to \c Rejected. + + \sa accept() done() +*/ + +void QDialog::reject() +{ + done(Rejected); +} + +/*! \reimp */ +bool QDialog::eventFilter(QObject *o, QEvent *e) +{ + return QWidget::eventFilter(o, e); +} + +/***************************************************************************** + Event handlers + *****************************************************************************/ + +#ifndef QT_NO_CONTEXTMENU +/*! \reimp */ +void QDialog::contextMenuEvent(QContextMenuEvent *e) +{ +#if defined(QT_NO_WHATSTHIS) || defined(QT_NO_MENU) + Q_UNUSED(e); +#else + QWidget *w = childAt(e->pos()); + if (!w) { + w = rect().contains(e->pos()) ? this : 0; + if (!w) + return; + } + while (w && w->whatsThis().size() == 0 && !w->testAttribute(Qt::WA_CustomWhatsThis)) + w = w->isWindow() ? 0 : w->parentWidget(); + if (w) { + QMenu p(this); + QAction *wt = p.addAction(tr("What's This?")); + if (p.exec(e->globalPos()) == wt) { + QHelpEvent e(QEvent::WhatsThis, w->rect().center(), + w->mapToGlobal(w->rect().center())); + QApplication::sendEvent(w, &e); + } + } +#endif +} +#endif // QT_NO_CONTEXTMENU + +/*! \reimp */ +void QDialog::keyPressEvent(QKeyEvent *e) +{ + // Calls reject() if Escape is pressed. Simulates a button + // click for the default button if Enter is pressed. Move focus + // for the arrow keys. Ignore the rest. +#ifdef Q_WS_MAC + if(e->modifiers() == Qt::ControlModifier && e->key() == Qt::Key_Period) { + reject(); + } else +#endif + if (!e->modifiers() || (e->modifiers() & Qt::KeypadModifier && e->key() == Qt::Key_Enter)) { + switch (e->key()) { + case Qt::Key_Enter: + case Qt::Key_Return: { + QList<QPushButton*> list = qFindChildren<QPushButton*>(this); + for (int i=0; i<list.size(); ++i) { + QPushButton *pb = list.at(i); + if (pb->isDefault() && pb->isVisible()) { + if (pb->isEnabled()) + pb->click(); + return; + } + } + } + break; + case Qt::Key_Escape: + reject(); + break; + case Qt::Key_Up: + case Qt::Key_Left: + if (focusWidget() && + (focusWidget()->focusPolicy() == Qt::StrongFocus || + focusWidget()->focusPolicy() == Qt::WheelFocus)) { + e->ignore(); + break; + } + // call ours, since c++ blocks us from calling the one + // belonging to focusWidget(). + focusNextPrevChild(false); + break; + case Qt::Key_Down: + case Qt::Key_Right: + if (focusWidget() && + (focusWidget()->focusPolicy() == Qt::StrongFocus || + focusWidget()->focusPolicy() == Qt::WheelFocus)) { + e->ignore(); + break; + } + focusNextPrevChild(true); + break; + default: + e->ignore(); + return; + } + } else { + e->ignore(); + } +} + +/*! \reimp */ +void QDialog::closeEvent(QCloseEvent *e) +{ +#ifndef QT_NO_WHATSTHIS + if (isModal() && QWhatsThis::inWhatsThisMode()) + QWhatsThis::leaveWhatsThisMode(); +#endif + if (isVisible()) { + QPointer<QObject> that = this; + reject(); + if (that && isVisible()) + e->ignore(); + } else { + e->accept(); + } +} + +/***************************************************************************** + Geometry management. + *****************************************************************************/ + +/*! \reimp +*/ + +void QDialog::setVisible(bool visible) +{ + Q_D(QDialog); + if (visible) { + if (testAttribute(Qt::WA_WState_ExplicitShowHide) && !testAttribute(Qt::WA_WState_Hidden)) + return; + + if (!testAttribute(Qt::WA_Moved)) { + Qt::WindowStates state = windowState(); + adjustPosition(parentWidget()); + setAttribute(Qt::WA_Moved, false); // not really an explicit position + if (state != windowState()) + setWindowState(state); + } + QWidget::setVisible(visible); + showExtension(d->doShowExtension); + QWidget *fw = window()->focusWidget(); + if (!fw) + fw = this; + + /* + The following block is to handle a special case, and does not + really follow propper logic in concern of autoDefault and TAB + order. However, it's here to ease usage for the users. If a + dialog has a default QPushButton, and first widget in the TAB + order also is a QPushButton, then we give focus to the main + default QPushButton. This simplifies code for the developers, + and actually catches most cases... If not, then they simply + have to use [widget*]->setFocus() themselves... + */ + if (d->mainDef && fw->focusPolicy() == Qt::NoFocus) { + QWidget *first = fw; + while ((first = first->nextInFocusChain()) != fw && first->focusPolicy() == Qt::NoFocus) + ; + if (first != d->mainDef && qobject_cast<QPushButton*>(first)) + d->mainDef->setFocus(); + } + if (!d->mainDef && isWindow()) { + QWidget *w = fw; + while ((w = w->nextInFocusChain()) != fw) { + QPushButton *pb = qobject_cast<QPushButton *>(w); + if (pb && pb->autoDefault() && pb->focusPolicy() != Qt::NoFocus) { + pb->setDefault(true); + break; + } + } + } + if (fw && !fw->hasFocus()) { + QFocusEvent e(QEvent::FocusIn, Qt::TabFocusReason); + QApplication::sendEvent(fw, &e); + } + +#ifndef QT_NO_ACCESSIBILITY + QAccessible::updateAccessibility(this, 0, QAccessible::DialogStart); +#endif + + } else { + if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden)) + return; + +#ifndef QT_NO_ACCESSIBILITY + if (isVisible()) + QAccessible::updateAccessibility(this, 0, QAccessible::DialogEnd); +#endif + + // Reimplemented to exit a modal event loop when the dialog is hidden. + QWidget::setVisible(visible); + if (d->eventLoop) + d->eventLoop->exit(); + } +#ifdef Q_WS_WIN + if (d->mainDef && isActiveWindow()) { + BOOL snapToDefault = false; + if ( QT_WA_INLINE( SystemParametersInfo(SPI_GETSNAPTODEFBUTTON, 0, &snapToDefault, 0) , + SystemParametersInfoA(SPI_GETSNAPTODEFBUTTON, 0, &snapToDefault, 0) )) { + if (snapToDefault) + QCursor::setPos(d->mainDef->mapToGlobal(d->mainDef->rect().center())); + } + } +#endif +} + +/*!\reimp */ +void QDialog::showEvent(QShowEvent *event) +{ + if (!event->spontaneous() && !testAttribute(Qt::WA_Moved)) { + Qt::WindowStates state = windowState(); + adjustPosition(parentWidget()); + setAttribute(Qt::WA_Moved, false); // not really an explicit position + if (state != windowState()) + setWindowState(state); + } +} + +/*! \internal */ +void QDialog::adjustPosition(QWidget* w) +{ +#ifdef Q_WS_X11 + // if the WM advertises that it will place the windows properly for us, let it do it :) + if (X11->isSupportedByWM(ATOM(_NET_WM_FULL_PLACEMENT))) + return; +#endif + + QPoint p(0, 0); + int extraw = 0, extrah = 0, scrn = 0; + if (w) + w = w->window(); + QRect desk; + if (w) { + scrn = QApplication::desktop()->screenNumber(w); + } else if (QApplication::desktop()->isVirtualDesktop()) { + scrn = QApplication::desktop()->screenNumber(QCursor::pos()); + } else { + scrn = QApplication::desktop()->screenNumber(this); + } + desk = QApplication::desktop()->availableGeometry(scrn); + + QWidgetList list = QApplication::topLevelWidgets(); + for (int i = 0; (extraw == 0 || extrah == 0) && i < list.size(); ++i) { + QWidget * current = list.at(i); + if (current->isVisible()) { + int framew = current->geometry().x() - current->x(); + int frameh = current->geometry().y() - current->y(); + + extraw = qMax(extraw, framew); + extrah = qMax(extrah, frameh); + } + } + + // sanity check for decoration frames. With embedding, we + // might get extraordinary values + if (extraw == 0 || extrah == 0 || extraw >= 10 || extrah >= 40) { + extrah = 40; + extraw = 10; + } + + + if (w) { + // Use mapToGlobal rather than geometry() in case w might + // be embedded in another application + QPoint pp = w->mapToGlobal(QPoint(0,0)); + p = QPoint(pp.x() + w->width()/2, + pp.y() + w->height()/ 2); + } else { + // p = middle of the desktop + p = QPoint(desk.x() + desk.width()/2, desk.y() + desk.height()/2); + } + + // p = origin of this + p = QPoint(p.x()-width()/2 - extraw, + p.y()-height()/2 - extrah); + + + if (p.x() + extraw + width() > desk.x() + desk.width()) + p.setX(desk.x() + desk.width() - width() - extraw); + if (p.x() < desk.x()) + p.setX(desk.x()); + + if (p.y() + extrah + height() > desk.y() + desk.height()) + p.setY(desk.y() + desk.height() - height() - extrah); + if (p.y() < desk.y()) + p.setY(desk.y()); + + move(p); +} + + +/*! + \obsolete + + If \a orientation is Qt::Horizontal, the extension will be displayed + to the right of the dialog's main area. If \a orientation is + Qt::Vertical, the extension will be displayed below the dialog's main + area. + + Instead of using this functionality, we recommend that you simply call + show() or hide() on the part of the dialog that you want to use as an + extension. See the \l{Extension Example} for details. + + \sa setExtension() +*/ +void QDialog::setOrientation(Qt::Orientation orientation) +{ + Q_D(QDialog); + d->orientation = orientation; +} + +/*! + \obsolete + + Returns the dialog's extension orientation. + + Instead of using this functionality, we recommend that you simply call + show() or hide() on the part of the dialog that you want to use as an + extension. See the \l{Extension Example} for details. + + \sa extension() +*/ +Qt::Orientation QDialog::orientation() const +{ + Q_D(const QDialog); + return d->orientation; +} + +/*! + \obsolete + + Sets the widget, \a extension, to be the dialog's extension, + deleting any previous extension. The dialog takes ownership of the + extension. Note that if 0 is passed any existing extension will be + deleted. This function must only be called while the dialog is hidden. + + Instead of using this functionality, we recommend that you simply call + show() or hide() on the part of the dialog that you want to use as an + extension. See the \l{Extension Example} for details. + + \sa showExtension(), setOrientation() +*/ +void QDialog::setExtension(QWidget* extension) +{ + Q_D(QDialog); + delete d->extension; + d->extension = extension; + + if (!extension) + return; + + if (extension->parentWidget() != this) + extension->setParent(this); + extension->hide(); +} + +/*! + \obsolete + + Returns the dialog's extension or 0 if no extension has been + defined. + + Instead of using this functionality, we recommend that you simply call + show() or hide() on the part of the dialog that you want to use as an + extension. See the \l{Extension Example} for details. + + \sa showExtension(), setOrientation() +*/ +QWidget* QDialog::extension() const +{ + Q_D(const QDialog); + return d->extension; +} + + +/*! + \obsolete + + If \a showIt is true, the dialog's extension is shown; otherwise the + extension is hidden. + + Instead of using this functionality, we recommend that you simply call + show() or hide() on the part of the dialog that you want to use as an + extension. See the \l{Extension Example} for details. + + \sa show(), setExtension(), setOrientation() +*/ +void QDialog::showExtension(bool showIt) +{ + Q_D(QDialog); + d->doShowExtension = showIt; + if (!d->extension) + return; + if (!testAttribute(Qt::WA_WState_Visible)) + return; + if (d->extension->isVisible() == showIt) + return; + + if (showIt) { + d->size = size(); + d->min = minimumSize(); + d->max = maximumSize(); + if (layout()) + layout()->setEnabled(false); + QSize s(d->extension->sizeHint() + .expandedTo(d->extension->minimumSize()) + .boundedTo(d->extension->maximumSize())); + if (d->orientation == Qt::Horizontal) { + int h = qMax(height(), s.height()); + d->extension->setGeometry(width(), 0, s.width(), h); + setFixedSize(width() + s.width(), h); + } else { + int w = qMax(width(), s.width()); + d->extension->setGeometry(0, height(), w, s.height()); + setFixedSize(w, height() + s.height()); + } + d->extension->show(); +#ifndef QT_NO_SIZEGRIP + const bool sizeGripEnabled = isSizeGripEnabled(); + setSizeGripEnabled(false); + d->sizeGripEnabled = sizeGripEnabled; +#endif + } else { + d->extension->hide(); + // workaround for CDE window manager that won't shrink with (-1,-1) + setMinimumSize(d->min.expandedTo(QSize(1, 1))); + setMaximumSize(d->max); + resize(d->size); + if (layout()) + layout()->setEnabled(true); +#ifndef QT_NO_SIZEGRIP + setSizeGripEnabled(d->sizeGripEnabled); +#endif + } +} + + +/*! \reimp */ +QSize QDialog::sizeHint() const +{ + Q_D(const QDialog); + if (d->extension) { + if (d->orientation == Qt::Horizontal) + return QSize(QWidget::sizeHint().width(), + qMax(QWidget::sizeHint().height(),d->extension->sizeHint().height())); + else + return QSize(qMax(QWidget::sizeHint().width(), d->extension->sizeHint().width()), + QWidget::sizeHint().height()); + } + + return QWidget::sizeHint(); +} + + +/*! \reimp */ +QSize QDialog::minimumSizeHint() const +{ + Q_D(const QDialog); + if (d->extension) { + if (d->orientation == Qt::Horizontal) + return QSize(QWidget::minimumSizeHint().width(), + qMax(QWidget::minimumSizeHint().height(), d->extension->minimumSizeHint().height())); + else + return QSize(qMax(QWidget::minimumSizeHint().width(), d->extension->minimumSizeHint().width()), + QWidget::minimumSizeHint().height()); + } + + return QWidget::minimumSizeHint(); +} + +/*! + \property QDialog::modal + \brief whether show() should pop up the dialog as modal or modeless + + By default, this property is false and show() pops up the dialog + as modeless. Setting his property to true is equivalent to setting + QWidget::windowModality to Qt::ApplicationModal. + + exec() ignores the value of this property and always pops up the + dialog as modal. + + \sa QWidget::windowModality, show(), exec() +*/ + +void QDialog::setModal(bool modal) +{ + setAttribute(Qt::WA_ShowModal, modal); +} + + +bool QDialog::isSizeGripEnabled() const +{ +#ifndef QT_NO_SIZEGRIP + Q_D(const QDialog); + return !!d->resizer; +#else + return false; +#endif +} + + +void QDialog::setSizeGripEnabled(bool enabled) +{ +#ifdef QT_NO_SIZEGRIP + Q_UNUSED(enabled); +#else + Q_D(QDialog); +#ifndef QT_NO_SIZEGRIP + d->sizeGripEnabled = enabled; + if (enabled && d->doShowExtension) + return; +#endif + if (!enabled != !d->resizer) { + if (enabled) { + d->resizer = new QSizeGrip(this); + // adjustSize() processes all events, which is suboptimal + d->resizer->resize(d->resizer->sizeHint()); + if (isRightToLeft()) + d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft()); + else + d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight()); + d->resizer->raise(); + d->resizer->show(); + } else { + delete d->resizer; + d->resizer = 0; + } + } +#endif //QT_NO_SIZEGRIP +} + + + +/*! \reimp */ +void QDialog::resizeEvent(QResizeEvent *) +{ +#ifndef QT_NO_SIZEGRIP + Q_D(QDialog); + if (d->resizer) { + if (isRightToLeft()) + d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft()); + else + d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight()); + d->resizer->raise(); + } +#endif +} + +/*! \fn void QDialog::finished(int result) + \since 4.1 + + This signal is emitted when the dialog's \a result code has been + set, either by the user or by calling done(), accept(), or + reject(). + + Note that this signal is \e not emitted when hiding the dialog + with hide() or setVisible(false). This includes deleting the + dialog while it is visible. + + \sa accepted(), rejected() +*/ + +/*! \fn void QDialog::accepted() + \since 4.1 + + This signal is emitted when the dialog has been accepted either by + the user or by calling accept() or done() with the + QDialog::Accepted argument. + + Note that this signal is \e not emitted when hiding the dialog + with hide() or setVisible(false). This includes deleting the + dialog while it is visible. + + \sa finished(), rejected() +*/ + +/*! \fn void QDialog::rejected() + \since 4.1 + + This signal is emitted when the dialog has been rejected either by + the user or by calling reject() or done() with the + QDialog::Rejected argument. + + Note that this signal is \e not emitted when hiding the dialog + with hide() or setVisible(false). This includes deleting the + dialog while it is visible. + + \sa finished(), accepted() +*/ + +QT_END_NAMESPACE +#include "moc_qdialog.cpp" |