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Windows QPA: Fix multiple mouse button presses detection

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The detection of multiple mouse button presses was broken in the new
WM_POINTER-based implementation. The bug was due to the incorrect
assumption that the press/release of a second mouse button (while
another one is held) would also send WM_POINTERDOWN/WM_POINTERUP, while
in fact it sends a WM_POINTERUPDATE with the actual event type given
by pointerInfo->ButtonChangeType.

Task-number: QTBUG-70787
Change-Id: Ib6776ab7f3d0b8eb5e832a0c863a15bde456e0dd
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This commit is contained in:
Andre de la Rocha 2018-10-02 09:19:19 +02:00
parent 18be2337ea
commit 4840668994
1 changed files with 42 additions and 16 deletions
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58
src/plugins/platforms/windows/qwindowspointerhandler.cpp
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@ -61,6 +61,8 @@
#include <QtCore/qloggingcategory.h>
#include <QtCore/qoperatingsystemversion.h>
#include <algorithm>
#include <windowsx.h>
QT_BEGIN_NAMESPACE
@ -184,41 +186,65 @@ static void getMouseEventInfo(UINT message, POINTER_BUTTON_CHANGE_TYPE changeTyp
{POINTER_CHANGE_FIFTHBUTTON_UP, Qt::XButton2},
};
static const QHash<UINT, QEvent::Type> eventMapping {
{WM_POINTERUPDATE, QEvent::MouseMove},
{WM_POINTERDOWN, QEvent::MouseButtonPress},
{WM_POINTERUP, QEvent::MouseButtonRelease},
{WM_NCPOINTERUPDATE, QEvent::NonClientAreaMouseMove},
{WM_NCPOINTERDOWN, QEvent::NonClientAreaMouseButtonPress},
{WM_NCPOINTERUP, QEvent::NonClientAreaMouseButtonRelease},
{WM_POINTERWHEEL, QEvent::Wheel},
{WM_POINTERHWHEEL, QEvent::Wheel},
static const POINTER_BUTTON_CHANGE_TYPE downChanges[] = {
POINTER_CHANGE_FIRSTBUTTON_DOWN,
POINTER_CHANGE_SECONDBUTTON_DOWN,
POINTER_CHANGE_THIRDBUTTON_DOWN,
POINTER_CHANGE_FOURTHBUTTON_DOWN,
POINTER_CHANGE_FIFTHBUTTON_DOWN,
};
static const POINTER_BUTTON_CHANGE_TYPE upChanges[] = {
POINTER_CHANGE_FIRSTBUTTON_UP,
POINTER_CHANGE_SECONDBUTTON_UP,
POINTER_CHANGE_THIRDBUTTON_UP,
POINTER_CHANGE_FOURTHBUTTON_UP,
POINTER_CHANGE_FIFTHBUTTON_UP,
};
if (!eventType || !mouseButton)
return;
if (message == WM_POINTERDOWN || message == WM_POINTERUP || message == WM_NCPOINTERDOWN || message == WM_NCPOINTERUP)
*mouseButton = buttonMapping.value(changeType, Qt::NoButton);
else
*mouseButton = Qt::NoButton;
const bool nonClient = message == WM_NCPOINTERUPDATE ||
message == WM_NCPOINTERDOWN ||
message == WM_NCPOINTERUP;
*eventType = eventMapping.value(message, QEvent::None);
if (std::find(std::begin(downChanges),
std::end(downChanges), changeType) < std::end(downChanges)) {
*eventType = nonClient ? QEvent::NonClientAreaMouseButtonPress :
QEvent::MouseButtonPress;
} else if (std::find(std::begin(upChanges),
std::end(upChanges), changeType) < std::end(upChanges)) {
*eventType = nonClient ? QEvent::NonClientAreaMouseButtonRelease :
QEvent::MouseButtonRelease;
} else if (message == WM_POINTERWHEEL || message == WM_POINTERHWHEEL) {
*eventType = QEvent::Wheel;
} else {
*eventType = nonClient ? QEvent::NonClientAreaMouseMove :
QEvent::MouseMove;
}
*mouseButton = buttonMapping.value(changeType, Qt::NoButton);
// Pointer messages lack a double click indicator. Check if this is the case here.
if (message == WM_POINTERDOWN) {
if (*eventType == QEvent::MouseButtonPress ||
*eventType == QEvent::NonClientAreaMouseButtonPress) {
static LONG lastTime = 0;
static Qt::MouseButton lastButton = Qt::NoButton;
static QEvent::Type lastEvent = QEvent::None;
static QPoint lastPos;
LONG messageTime = GetMessageTime();
if (*mouseButton == lastButton
&& *eventType == lastEvent
&& messageTime - lastTime < (LONG)GetDoubleClickTime()
&& qAbs(globalPos.x() - lastPos.x()) < GetSystemMetrics(SM_CXDOUBLECLK)
&& qAbs(globalPos.y() - lastPos.y()) < GetSystemMetrics(SM_CYDOUBLECLK)) {
*eventType = QEvent::MouseButtonDblClick;
*eventType = nonClient ? QEvent::NonClientAreaMouseButtonDblClick :
QEvent::MouseButtonDblClick;
}
lastTime = messageTime;
lastButton = *mouseButton;
lastEvent = *eventType;
lastPos = globalPos;
}
}