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MDI windows will now poput into floating mode

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when dragged behond the edges
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Sergio Martins
2021-02-13 18:30:59 +00:00
parent 15ff882919
commit 544d3b026a
2 changed files with 14 additions and 6 deletions
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19
src/private/DragController.cpp
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@@ -32,6 +32,8 @@
# include <windows.h>
#endif
#define MDI_POPOUT_THRESHOLD 250
using namespace KDDockWidgets;
namespace KDDockWidgets {
@@ -424,17 +426,21 @@ bool StateInternalMDIDragging::handleMouseMove(QPoint globalPos)
const QSize parentSize = frame->QWidgetAdapter::parentWidget()->size();
const QPoint oldPos = frame->mapToGlobal(QPoint(0, 0));
const QPoint delta = globalPos - oldPos;
QPoint newLocalPos = frame->pos() + delta - q->m_offset;
const QPoint newLocalPos = frame->pos() + delta - q->m_offset;
// Let's not allow the MDI window to go outside of its parent
newLocalPos.setX(qMax(0, newLocalPos.x()));
newLocalPos.setY(qMax(0, newLocalPos.y()));
newLocalPos.setX(qMin(newLocalPos.x(), parentSize.width() - frame->width()));
newLocalPos.setY(qMin(newLocalPos.y(), parentSize.height() - frame->height()));
QPoint newLocalPosBounded = {qMax(0, newLocalPos.x()), qMax(0, newLocalPos.y())};
newLocalPosBounded.setX(qMin(newLocalPosBounded.x(), parentSize.width() - frame->width()));
newLocalPosBounded.setY(qMin(newLocalPosBounded.y(), parentSize.height() - frame->height()));
frame->QWidgetAdapter::move(newLocalPos);
frame->QWidgetAdapter::move(newLocalPosBounded);
// Check if we need to pop out the MDI window (make it float)
// If we drag the window against an edge, and move behind the edge some threshold, we float it
const QPoint overflow = newLocalPosBounded - newLocalPos;
if (qAbs(overflow.x()) > MDI_POPOUT_THRESHOLD || qAbs(overflow.y()) > MDI_POPOUT_THRESHOLD)
Q_EMIT q->mdiPopOut();
return false;
}
@@ -557,6 +563,7 @@ DragController::DragController(QObject *parent)
stateDragging->addTransition(this, &DragController::dropped, stateNone);
stateDraggingMDI->addTransition(this, &DragController::dragCanceled, stateNone);
stateDraggingMDI->addTransition(this, &DragController::mdiPopOut, stateDragging);
if (usesFallbackMouseGrabber())
enableFallbackMouseGrabber();