mouse-coordinates | 易学教程

Tracking mouse coordinates in Qt

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问题 Let's say I have a widget in main window, and want to track mouse position ONLY on the widget: it means that left-low corner of widget must be local (0, 0). Q: How can I do this? p.s. NON of functions below do that. widget->mapFromGlobal(QCursor::pos()).x(); QCursor::pos()).x(); event->x(); 回答1: I am afraid, you won't be happy with your requirement 'lower left must be (0,0). In Qt coordinate systems (0,0) is upper left. If you can accept that. The following code... setMouseTracking(true); //

How do I get the current mouse screen coordinates in WPF?

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How to get current mouse coordination on the screen? I know only Mouse.GetPosition() which get mousePosition of element, but I want to get the coordination without using element. To follow up on Rachel's answer. Here's two ways in which you can get Mouse Screen Coordinates in WPF. 1.Using Windows Forms. Add a reference to System.Windows.Forms public static Point GetMousePositionWindowsForms() { System.Drawing.Point point = Control.MousePosition; return new Point(point.X, point.Y); } 2.Using Win32 [DllImport("user32.dll")] [return: MarshalAs(UnmanagedType.Bool)] internal static extern bool

Mouse / Canvas X, Y to Three.js World X, Y, Z

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I've searched around for an example that matches my use case but cannot find one. I'm trying to convert screen mouse co-ordinates into 3D world co-ordinates taking into account the camera. Solutions I've found all do ray intersection to achieve object picking. What I am trying to do is position the center of a Three.js object at the co-ordinates that the mouse is currently "over". My camera is at x:0, y:0, z:500 (although it will move during the simulation) and all my objects are at z = 0 with varying x and y values so I need to know the world X, Y based on assuming a z = 0 for the object that

How do I get the current mouse screen coordinates in WPF?

阅读更多关于 How do I get the current mouse screen coordinates in WPF?

问题 How to get current mouse coordination on the screen? I know only Mouse.GetPosition() which get mousePosition of element, but I want to get the coordination without using element. 回答1: To follow up on Rachel's answer. Here's two ways in which you can get Mouse Screen Coordinates in WPF. 1.Using Windows Forms. Add a reference to System.Windows.Forms public static Point GetMousePositionWindowsForms() { System.Drawing.Point point = Control.MousePosition; return new Point(point.X, point.Y); } 2

Mouse / Canvas X, Y to Three.js World X, Y, Z

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问题 I\'ve searched around for an example that matches my use case but cannot find one. I\'m trying to convert screen mouse co-ordinates into 3D world co-ordinates taking into account the camera. Solutions I\'ve found all do ray intersection to achieve object picking. What I am trying to do is position the center of a Three.js object at the co-ordinates that the mouse is currently \"over\". My camera is at x:0, y:0, z:500 (although it will move during the simulation) and all my objects are at z =