Windows窗体的多个滑块轨迹栏 [英] Multiple slider trackbar for windows forms

问题描述

有人知道如何在 WinForms 中创建带有多个滑块的轨迹栏吗?我想标记一个范围.另外，是否可以稍微垂直偏移滑块?我的目标是在轨迹栏上方有两个滑块，在其下方有两个滑块.

Does anyone have any idea on how to create a trackbar with multiple sliders in WinForms? I would like to mark a range. Also, is it possible to offset the sliders vertically a little bit? My goal would be to have two sliders above the trackbar, and two below it.

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推荐答案

您可以通过编写自己的 UserControl 来完成此操作，您可以在其中处理鼠标事件并自行绘制.您将需要多个命中测试区域；每个拇指一个.

You can do this by writing your own UserControl where you handle the mouse events and painting yourself. You would need several hit test regions; one for each thumb.

要绘制轨迹栏，您需要 ControlPaint 和 System.Windows.Forms.VisualStyles 命名空间.最值得注意的是，VisualStyleElement.TrackBar.ThumbTop, VisualStyleElement.TrackBar.ThumbBottom 和 VisualStyleElement.TrackBar.Track 分别用于绘制拇指和轨迹.

To draw the trackbar, you would need a combination of ControlPaint and the theming APIs provided by the System.Windows.Forms.VisualStyles namespace. Most notably, the VisualStyleElement.TrackBar.ThumbTop, VisualStyleElement.TrackBar.ThumbBottom, and VisualStyleElement.TrackBar.Track for drawing the thumbs and track respectively.

当主题不可用时(例如在 Win2k 上或主题被禁用时)，您可以使用 ControlPaint 调用为轨道和拇指绘制框架和按钮.

You use the ControlPaint calls to draw a frame and buttons for the track and thumbs when theming is unavailable (such as on Win2k or when theming is disabled).

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