Python QApplication.startDragDistance方法代码示例

# 需要导入模块: from enaml.qt.QtGui import QApplication [as 别名]
# 或者: from enaml.qt.QtGui.QApplication import startDragDistance [as 别名]
    def mouseMoveEvent(self, event):
        """ Handle the mouse move event for the tab bar.

        This handler will undock the tab if the mouse is held and the
        drag leaves the boundary of the container by the application
        drag distance amount.

        """
        super(QDockTabBar, self).mouseMoveEvent(event)
        if not self._has_mouse:
            return
        pos = event.pos()
        if self.rect().contains(pos):
            return
        x = max(0, min(pos.x(), self.width()))
        y = max(0, min(pos.y(), self.height()))
        dist = (QPoint(x, y) - pos).manhattanLength()
        if dist > QApplication.startDragDistance():
            # Fake a mouse release event so that the tab resets its
            # internal state and finalizes the animation for the tab.
            # The button must be Qt.LeftButton, not event.button().
            btn = Qt.LeftButton
            mod = event.modifiers()
            evt = QMouseEvent(QEvent.MouseButtonRelease, pos, btn, btn, mod)
            QApplication.sendEvent(self, evt)
            container = self.parent().widget(self.currentIndex())
            container.untab(event.globalPos())
            self._has_mouse = False

# 需要导入模块: from enaml.qt.QtGui import QApplication [as 别名]
# 或者: from enaml.qt.QtGui.QApplication import startDragDistance [as 别名]
    def titleBarMouseMoveEvent(self, event):
        """ Handle a mouse move event on the title bar.

        Returns
        -------
        result : bool
            True if the event is handled, False otherwise.

        """
        state = self.frame_state
        if state.press_pos is None:
            return False

        # If dragging and floating, move the container's position and
        # notify the manager of that the container was mouse moved. If
        # the container is maximized, it is first restored before.
        global_pos = event.globalPos()
        if state.dragging:
            if self.isWindow():
                target_pos = global_pos - state.press_pos
                self.manager().drag_move_frame(self, target_pos, global_pos)
            return True

        # Ensure the drag has crossed the app drag threshold.
        dist = (event.pos() - state.press_pos).manhattanLength()
        if dist <= QApplication.startDragDistance():
            return True

        # If the container is already floating, ensure that it is shown
        # normal size. The next move event will move the window.
        state.dragging = True
        if self.isWindow():
            state.frame_was_maximized = self.isMaximized()
            if state.frame_was_maximized:
                coeff = state.press_pos.x() / float(self.width())
                self.showNormal()
                state.press_pos = _computePressPos(self, coeff)
            return True

        # Restore a maximized dock item before unplugging.
        if state.item_is_maximized:
            bar = self.dockItem().titleBarWidget()
            coeff = state.press_pos.x() / float(bar.width())
            self.showNormal()
            state.press_pos = _computePressPos(self, coeff)

        # Unplug the container from the layout before floating so
        # that layout widgets can clean themselves up when empty.
        if not self.unplug():
            return False
        self.postUndockedEvent()

        # Make the container a toplevel frame, update it's Z-order,
        # and grab the mouse to continue processing drag events.
        self.float()
        self.raiseFrame()
        margins = self.layout().contentsMargins()
        state.press_pos += QPoint(0, margins.top())
        state.start_pos = global_pos - state.press_pos
        self.move(state.start_pos)
        self.show()
        self.grabMouse()
        self.activateWindow()
        self.raise_()
        return True