blocks|key|2484394|text|由于您只有几个地方需要查询全局鼠标位置，所以我建议您使用mapToGlobal或mapToItem方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2484395|entityMap|0|LINK|mutability|MUTABLE|url|http://doc.qt.io/qt-5/qml-qtquick-item.html#mapToGlobal-method|1|http://doc.qt.io/qt-5/qml-qtquick-item.html#mapToItem-method^0|S|B|0|14|9|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

As you have only a couple of places where you need to query global mouse position, I would suggest you to use <a href="http://doc.qt.io/qt-5/qml-qtquick-item.html#mapToGlobal-method" rel="nofollow noreferrer">mapToGlobal</a> or <a href="http://doc.qt.io/qt-5/qml-qtquick-item.html#mapToItem-method" rel="nofollow noreferrer">mapToItem</a> methods.

blocks|key|849275|text|我相信你可以从C%2B%2B侧得到光标的坐标。看看这个问题上的答案。这个问题与你的问题无关，但解决方案也同样有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|849276|在我这方面，我通过直接调用mousePosProvider.cursorPos()而没有任何MouseArea来获得全局坐标。|style|CODE|849277|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/39088835/dragging-frameless-window-jiggles-in-qml^0|L|4|0|0|D|S|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@$A|U|B|V|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|W|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

I believe you can get cursor's coordinates from C++ side. Take a look on answer on <a href="https://stackoverflow.com/questions/39088835/dragging-frameless-window-jiggles-in-qml">this question</a>. The question doesn't related to your problem but the solution works as well. 

On my side I managed to get global coordinates by directly calling <code>mousePosProvider.cursorPos()</code> without any MouseArea.

blocks|key|849318|text|您可以在eventFilter上安装一个QGuiApplication，在那里所有鼠标事件都会通过。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|849319|如何做到这一点被描述为这里|849320|在链接解决方案中，当发出信号时，我会删除有关鼠标位置的信息。但是，您可以通过将传递给eventFilter(...)-method的eventFilter(...)-method转换为QMouseEvent并将其作为参数添加到信号中来轻松检索信息。|849321|在链接答案中，我将其注册为QML和C%2B%2B中可用的单例，这样您就可以在任何需要的地方连接到信号。|849322|由于它是在链接的答案中提供的，MouseEventSpy将只处理各种类型的QMouseEvents。一旦开始拖动某个东西，就不会出现QMouseEvents，而是QDragMoveEvents+e.t.c。因此，您需要扩展filter方法，以处理这些问题。|849323|bool+MouseEventSpy::eventFilter(QObject*+watched,+QEvent*+event)
{
++++QEvent::Type+t+=+event->type();
++++if+(t+==+QEvent::MouseButtonDblClick
++++++++++++%7C%7C+t+==+QEvent::MouseButtonPress
++++++++++++%7C%7C+t+==+QEvent::MouseButtonRelease
++++++++++++%7C%7C+t+==+QEvent::MouseMove)+{
++++++++QMouseEvent*+e+=+static_cast<QMouseEvent*>(event);
++++++++emit+mouseEventDetected(e->x(),+e->y());
++++}

++++if+(t+==+QEvent::DragMove)+{
++++++++QDragMoveEvent*+e+=+static_cast<QDragMoveEvent*>(event);
++++++++emit+mouseEventDetected(e->pos().x(),+e->pos().y());
++++}
++++return+QObject::eventFilter(watched,+event);
}|code-block|syntax|javascript|849324|然后，您可以将坐标转换为您需要的任何东西(屏幕、窗口、.)|849325|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/46173896/2056452|1|http://doc.qt.io/qt-5/qmouseevent.html|2|http://doc.qt.io/qt-5/qdragmoveevent.html^0|4|B|0|B|2|0|0|16|G|1U|G|2K|B|2K|B|1|0|0|F|D|11|C|1U|C|29|F|2|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|H|3|I|5|6|7|1D|8|@$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|J|3|K|5|6|7|1N|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1O|8|@$9|1P|A|1Q|B|C]|$9|1R|A|1S|B|C]|$9|1T|A|1U|B|C]]|D|@$9|1V|A|1W|1|1X]]|E|$]]|$1|N|3|O|5|P|7|1Y|8|@]|D|@]|E|$Q|R]]|$1|S|3|T|5|6|7|1Z|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|20|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11]]|12|$5|X|Y|Z|E|$10|13]]|14|$5|X|Y|Z|E|$10|15]]]]

You can install a <code>eventFilter</code> on the QGuiApplication, where all mouse events will pass through.

How to do this is described <a href="https://stackoverflow.com/a/46173896/2056452">here</a>

In the linked solution, I drop the information about the mouse position when emitting the signal. You can however easily retrieve the information by casting the <code>QEvent</code> that is passed to the <code>eventFilter(...)</code>-method into a <a href="http://doc.qt.io/qt-5/qmouseevent.html" rel="nofollow noreferrer"><code>QMouseEvent</code></a> and add it as parameters to the signal.

In the linked answer I register it as singleton available in QML and C++ so you can connect to the signal where ever needed.

<hr>

As it is provided in the linked answer, the <code>MouseEventSpy</code> will only handle <code>QMouseEvents</code> of various types. Once you start dragging something, there won't be <code>QMouseEvents</code> but <a href="http://doc.qt.io/qt-5/qdragmoveevent.html" rel="nofollow noreferrer"><code>QDragMoveEvents</code></a> e.t.c. Therefore you need to extend the filter method, to also handle those.

<pre><code>bool MouseEventSpy::eventFilter(QObject* watched, QEvent* event)
{
 QEvent::Type t = event-&gt;type();
 if (t == QEvent::MouseButtonDblClick
 || t == QEvent::MouseButtonPress
 || t == QEvent::MouseButtonRelease
 || t == QEvent::MouseMove) {
 QMouseEvent* e = static_cast&lt;QMouseEvent*&gt;(event);
 emit mouseEventDetected(e-&gt;x(), e-&gt;y());
 }

 if (t == QEvent::DragMove) {
 QDragMoveEvent* e = static_cast&lt;QDragMoveEvent*&gt;(event);
 emit mouseEventDetected(e-&gt;pos().x(), e-&gt;pos().y());
 }
 return QObject::eventFilter(watched, event);
}
</code></pre>

<hr>

You can then translate the coordinates to what ever you need to (Screen, Window, ...)

I'm programming a small PoC in QML. In a couple of places in my code I need to bind to/query global mouse position (say, mouse position in a scene or game window). Even in cases where mouse is outside of MouseAreas that I've defined so far.

Looking around, the only way to do it seems to be having whole screen covered with another MouseArea, most likely with hovering enabled. Then I also need to deal with semi-manually propagating (hover) events to underlying mouseAreas..

Am I missing something here? This seems like a pretty common case - is there a simpler/more elegant way to achieve it?

EDIT:
The most problematic case seems to be while dragging outside a MouseArea. Below is a minimalistic example (it's using V-Play components and a mouse event spy from derM's answer). When I click the image and drag outside the MouseArea, mouse events are not coming anymore so the position cannot be updated unless there is a DropArea below.

<blockquote>
 The <code>MouseEventSpy</code> is taken from <a href="https://stackoverflow.com/questions/46173105/how-can-i-reset-a-timer-every-time-i-receive-a-touch-event-from-a-qml-page/46173896#46173896">here</a> in response to one of the answers. It is only modified to include the position as parameters to the signal.
</blockquote>

<pre><code>import VPlay 2.0
import QtQuick 2.0
import MouseEventSpy 1.0

GameWindow {
 id: gameWindow
 activeScene: scene
 screenWidth: 960
 screenHeight: 640

 Scene {
 id: scene
 anchors.fill: parent

 Connections {
 target: MouseEventSpy
 onMouseEventDetected: {
 console.log(x)
 console.log(y)
 }
 }

 Image {
 id: tile
 x: 118
 y: 190
 width: 200
 height: 200
 source: "../assets/vplay-logo.png"
 anchors.centerIn: parent

 Drag.active: mausA.drag.active
 Drag.dragType: Drag.Automatic

 MouseArea {
 id: mausA
 anchors.fill: parent
 drag.target: parent
 }
 }
 }
}
</code></pre>

Querying global mouse position in QML

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

教程

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云智能顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

聚焦“写作效率、视觉美观与运行性能”三方面进行全面升级，为您提供更高效、稳定的创作环境

社区富文本&Markdown编辑器全新改版上线，欢迎大家体验!

诚挚邀请您参与本次调研，分享您的真实使用感受与建议。您的反馈至关重要，感谢您的支持与参与！

社区新版编辑器体验调研

我正在用QML编写一个小型PoC。在我的代码中的几个地方，我需要绑定/查询全局鼠标位置(例如，在场景或游戏窗口中的鼠标位置)。即使在鼠标不在我定义的MouseAreas之外的情况下也是如此。环顾四周，唯一的方法似乎是用另一个MouseArea覆盖整个屏幕，很可能是启用了悬停。然后，我还需要处理半手动传播(悬停)事件到底...

问查询QML中的全局鼠标位置
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问查询QML中的全局鼠标位置EN