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Consider window frame size within centerWidgetAvoidingOverflow()

This commit is contained in:
Martchus 2021-03-24 21:24:15 +01:00
parent 3da940fe5b
commit 0c07bdb10c
1 changed files with 26 additions and 5 deletions
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31
misc/dialogutils.cpp
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@ -115,6 +115,15 @@ QRect availableScreenGeometryAtPoint(const QPoint &point)
}
/// \cond
static QRect shrinkRectByMargins(QRect rect, const QMargins &margins)
{
rect.setLeft(rect.left() + margins.left());
rect.setTop(rect.top() + margins.top());
rect.setRight(rect.right() - margins.right());
rect.setBottom(rect.bottom() - margins.bottom());
return rect;
}
static QRect limitRect(QRect rect, const QRect &bounds)
{
if (rect.left() < bounds.left()) {
@ -132,6 +141,18 @@ static QRect limitRect(QRect rect, const QRect &bounds)
return rect;
}
static QMargins widgetFrame(QWidget *widget, const QMargins &defaultAssumption = QMargins(10, 25, 10, 10))
{
if (!widget->isWindow()) {
return QMargins();
}
const auto widgetGeometry = widget->geometry();
const auto frameGeometry = widget->frameGeometry();
const auto frame = QMargins(widgetGeometry.left() - frameGeometry.left(), widgetGeometry.top() - frameGeometry.top(),
frameGeometry.right() - widgetGeometry.right(), frameGeometry.bottom() - widgetGeometry.bottom());
return frame.isNull() ? defaultAssumption : frame;
}
static bool centerWidgetInternal(QWidget *widget, const QWidget *parent, const QPoint *position, bool avoidOverflow)
{
const auto availableGeometry = parent ? parent->geometry() : availableScreenGeometryAtPoint(position ? *position : QCursor::pos());
@ -140,7 +161,7 @@ static bool centerWidgetInternal(QWidget *widget, const QWidget *parent, const Q
widget->setGeometry(alignedRect);
return false;
}
const auto limitedRect = limitRect(alignedRect, availableGeometry);
const auto limitedRect = limitRect(alignedRect, shrinkRectByMargins(availableGeometry, widgetFrame(widget)));
widget->setGeometry(limitedRect);
return alignedRect != limitedRect;
}
@ -160,10 +181,10 @@ void centerWidget(QWidget *widget, const QWidget *parent, const QPoint *position
* \brief Moves the specified \a widget to be centered within the (available) screen area or \a parent if specified.
* \returns Returns whether an overflow occurred.
* \remarks
* - If the widget overflows it is resized to take the whole available space in the dimention(s) that overflow. Note that
* this does *not* take the window frame into account. So if \a widget is a window it makes sense to show it using
* QWidget::showMaximized() to make it fill the entire screen to avoid clipped window frames. It makes also sense to
* assign a smaller size to avoid clipped window frames once the window is "de-maximized" again.
* - If the widget overflows it is resized to take the whole available space in the dimention(s) that overflow.
* If the widget is a window, its frame is attempted to be taken into account. If the window frame can not be determined
* a generous assumption is made. It can nevertheless make sense to simply show \a widget using QWidget::showMaximized()
* to make it simply fill the entire screen after all.
* - The screen containing the current cursor position is used unless \a position is specified.
*/
bool centerWidgetAvoidingOverflow(QWidget *widget, const QWidget *parent, const QPoint *position)