本文整理汇总了C++中QAbstractScrollArea::verticalScrollBarPolicy方法的典型用法代码示例。如果您正苦于以下问题：C++ QAbstractScrollArea::verticalScrollBarPolicy方法的具体用法？C++ QAbstractScrollArea::verticalScrollBarPolicy怎么用？C++ QAbstractScrollArea::verticalScrollBarPolicy使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QAbstractScrollArea的用法示例。
在下文中一共展示了QAbstractScrollArea::verticalScrollBarPolicy方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: mousePressEvent
/*!
\fn void CSizeGrip::mousePressEvent(QMouseEvent * event)
Receives the mouse press events for the widget, and primes the
resize operation. The mouse press event is passed in the \a event
parameter.
*/
void CSizeGrip::mousePressEvent(QMouseEvent * e)
{
ungrabGesture(Qt::TapAndHoldGesture);
if (e->button() != Qt::LeftButton) {
QWidget::mousePressEvent(e);
return;
}
QWidget *tlw = qt_sizegrip_topLevelWidget();
p = e->globalPos();
gotMousePress = true;
r = tlw->geometry();
#ifdef Q_WS_X11
#if QT_VERSION >= 0x050000
// Use a native X11 sizegrip for "real" top-level windows if supported.
if (tlw->isWindow() && X11->isSupportedByWM(ATOM(_NET_WM_MOVERESIZE))
&& !(tlw->windowFlags() & Qt::X11BypassWindowManagerHint)
&& !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !qt_widget_private(tlw)->hasHeightForWidth()) {
XEvent xev;
xev.xclient.type = ClientMessage;
xev.xclient.message_type = ATOM(_NET_WM_MOVERESIZE);
xev.xclient.display = X11->display;
xev.xclient.window = tlw->winId();
xev.xclient.format = 32;
xev.xclient.data.l[0] = e->globalPos().x();
xev.xclient.data.l[1] = e->globalPos().y();
if (atBottom())
xev.xclient.data.l[2] = atLeft() ? 6 : 4; // bottomleft/bottomright
else
xev.xclient.data.l[2] = atLeft() ? 0 : 2; // topleft/topright
xev.xclient.data.l[3] = Button1;
xev.xclient.data.l[4] = 0;
XUngrabPointer(X11->display, X11->time);
XSendEvent(X11->display, QX11Info::appRootWindow(x11Info().screen()), False,
SubstructureRedirectMask | SubstructureNotifyMask, &xev);
return;
}
#endif
#endif // Q_WS_X11
#ifdef Q_WS_WIN
#if QT_VERSION >= 0x050000
if (tlw->isWindow() && !tlw->testAttribute(Qt::WA_DontShowOnScreen) && !qt_widget_private(tlw)->hasHeightForWidth()) {
uint orientation = 0;
if (atBottom())
orientation = atLeft() ? SZ_SIZEBOTTOMLEFT : SZ_SIZEBOTTOMRIGHT;
else
orientation = atLeft() ? SZ_SIZETOPLEFT : SZ_SIZETOPRIGHT;
ReleaseCapture();
PostMessage(tlw->winId(), WM_SYSCOMMAND, orientation, 0);
return;
}
#endif
#endif // Q_WS_WIN
// Find available desktop/workspace geometry.
QRect availableGeometry;
bool hasVerticalSizeConstraint = true;
bool hasHorizontalSizeConstraint = true;
if (tlw->isWindow())
availableGeometry = QApplication::desktop()->availableGeometry(tlw);
else {
const QWidget *tlwParent = tlw->parentWidget();
// Check if tlw is inside QAbstractScrollArea/QScrollArea.
// If that's the case tlw->parentWidget() will return the viewport
// and tlw->parentWidget()->parentWidget() will return the scroll area.
#ifndef QT_NO_SCROLLAREA
QAbstractScrollArea *scrollArea = qobject_cast<QAbstractScrollArea *>(tlwParent->parentWidget());
if (scrollArea) {
hasHorizontalSizeConstraint = scrollArea->horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff;
hasVerticalSizeConstraint = scrollArea->verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff;
}
#endif // QT_NO_SCROLLAREA
availableGeometry = tlwParent->contentsRect();
}
// Find frame geometries, title bar height, and decoration sizes.
const QRect frameGeometry = tlw->frameGeometry();
const int titleBarHeight = qMax(tlw->geometry().y() - frameGeometry.y(), 0);
const int bottomDecoration = qMax(frameGeometry.height() - tlw->height() - titleBarHeight, 0);
const int leftRightDecoration = qMax((frameGeometry.width() - tlw->width()) / 2, 0);
// Determine dyMax depending on whether the sizegrip is at the bottom
// of the widget or not.
if (atBottom()) {
if (hasVerticalSizeConstraint)
dyMax = availableGeometry.bottom() - r.bottom() - bottomDecoration;
else
dyMax = INT_MAX;
} else {
//.........这里部分代码省略.........