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Delphi：实时运行时滚动

[英]Delphi: scrolling whilst running real time

原文 2017-09-20 09:50:02 0 1 delphi/ responsiveness/ form-control

I have implemented a Scroll box that dynamically adds TCharts dependent on the number of channels available on an input device. 我实现了一个滚动框，该滚动框根据输入设备上可用通道的数量动态添加TCharts。 The charts repaint on a loop to show the value of the voltage through the channel, so that the display outputs effectively a "real-time" view of the voltages being applied to each channel. 这些图表在回路上重新绘制，以显示通过通道的电压值，从而使显示屏有效地输出施加到每个通道的电压的“实时”视图。

Currently I have an Application.ProcessMessages function to prevent the application becoming unresponsive during a run, but I would like to be able to scroll through the box whilst the channels are being displayed, without disturbing the display, which currently pauses whilst the scroll bar is clicked. 目前，我有一个Application.ProcessMessages函数来防止应用程序在运行过程中变得无响应，但是我希望能够在显示通道的同时滚动浏览框，而不会干扰显示，当前该显示在滚动条处于暂停状态时会暂停点击。

Is this possible? 这可能吗？

1 个解决方案

Yes, this is possible. 是的，这是可能的。

The charts repaint on a loop ... 图表在循环上重绘...

Repaints driven by an own loop indeed ensures respiratory distres on the system, which exactly is the reason for the need of Application.ProcessMessages . 由自己的循环驱动的重绘确实确保了系统上的呼吸偏移，这正是需要Application.ProcessMessages的原因。 Try not to use it . 尽量不要使用它。 Instead, you should just ask the charts to repaint themselves with Invalidate when new data comes in, and let the system decide when it is convenient to do so. 相反，您应该只要求图表在输入新数据时用Invalidate重新绘制自身，并让系统决定何时方便这样做。