static gboolean
btnReleaseHook(GSignalInvocationHint*, unsigned, const GValue*, void*)
{
if (dragWidget)
dragEnd();
return true;
}
void
CQDrag::
mouseMoveEvent(QMouseEvent *event)
{
// set press point (if not already set)
if (! pressed_) {
pressPos_ = event->pos();
pressed_ = true;
}
// Ignore if left button isn't pressed
if (! (event->buttons() & Qt::LeftButton))
return;
// If the distance is too small then return
if ((event->pos() - pressPos_).manhattanLength() < QApplication::startDragDistance())
return;
emit dragStart();
// initiate drag
QDrag *drag = new QDrag(this);
drag->setPixmap(QPixmap(drag_data));
QMimeData *mimeData = new QMimeData;
mimeData->setData("action", "CQDrag");
drag->setMimeData(mimeData);
drag->exec();
emit dragEnd();
}
static void
trigger(GtkWidget *w, int x, int y)
{
GtkWindow *topLevel = GTK_WINDOW(gtk_widget_get_toplevel(w));
xcb_window_t wid =
GDK_WINDOW_XID(gtk_widget_get_window(GTK_WIDGET(topLevel)));
qtcX11MoveTrigger(wid, x, y);
dragEnd();
}
void CInputHandler::processMessage(CMessage *msg) {
const CMouseMsg *mouseMsg = dynamic_cast<const CMouseMsg *>(msg);
_singleton = false;
dispatchMessage(msg);
if (_singleton) {
_singleton = false;
} else if (mouseMsg) {
// Keep the game state mouse position up to date
if (_mousePos != mouseMsg->_mousePos) {
_mousePos = mouseMsg->_mousePos;
_gameManager->_gameState.setMousePos(mouseMsg->_mousePos);
}
// Set flag for whether a mouse button is currently being pressed
if (mouseMsg->isButtonDownMsg())
_buttonDown = true;
else if (mouseMsg->isButtonUpMsg())
_buttonDown = false;
// Drag events generation
if (_dragging) {
if (mouseMsg->isMouseMoveMsg()) {
if (_dragItem) {
CMouseDragMoveMsg moveMsg(_mousePos);
moveMsg.execute(_dragItem);
}
} else {
if (mouseMsg->isButtonUpMsg() && _dragItem) {
// Mouse drag ended
CGameObject *target = dragEnd(_mousePos, _dragItem);
CMouseDragEndMsg endMsg(_mousePos, target);
endMsg.execute(_dragItem);
}
_dragging = false;
_dragItem = nullptr;
}
} else if (_buttonDown) {
if (!mouseMsg->isMouseMoveMsg()) {
// Save where the drag movement started from
_dragStartPos = _mousePos;
} else {
Point delta = mouseMsg->_mousePos - _dragStartPos;
int distance = (int)sqrt(double(delta.x * delta.x + delta.y * delta.y));
if (distance > 4) {
// We've moved far enough with the mouse button held down
// to trigger an official dragging operation
CMouseDragStartMsg startMsg(_dragStartPos);
dispatchMessage(&startMsg);
// Set the drag item, if any, that a handler will have set on the message
_dragItem = startMsg._dragItem;
_gameManager->_dragItem = startMsg._dragItem;
if (_dragItem) {
CMouseDragMoveMsg moveMsg(_dragStartPos);
dispatchMessage(&moveMsg);
}
_dragging = true;
}
}
}
}
}
static gboolean
leave(GtkWidget*, GdkEventMotion*, void*)
{
return dragEnd();
}