我已经创建了两个自定义面板(ParentPanel和ChildPanel),并将ChildPanel添加为ParentPanel的子组件。现在,我只想使子面板无效。但是,在调用ChildPanel.Invalidate(),时,已经为两个面板(ParentPanel和ChildPanel)调用了OnPaint方法。
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
private ParentPanel parentPanel;
public Form
我很想了解,带有png透明背景图像的面板和按钮如何能够在location.X和location.Y和/rescale中移动,而不必在透明子按钮或子面板控件中更新父背景图像。
这是我用来让鼠标进入鼠标离开滑动面板的代码
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
If entered = True Then
Panel4.Width += 1
'or you can use Location.new poin
在使用Plot3DPanel时,我不断地收到以下错误
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.math.plot.render.Projection.screenProjection(Unknown Source)
at org.math.plot.render.AWTDrawer.drawLine(Unknown Source)
at org.math.plot.plotObjects.Li
我使用以下代码拖动面板
public void researchMenu_MouseisDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
dragging = true;
x = e.X;
y = e.Y;
}
}
public void researchMenu_MouseisUp(object sender, MouseEventArgs e
官方文件上写着The method takes a callback as an argument to be invoked before the repaint. ()
我在下面编写了一个简单的代码:
<html>
<div style="width: 10px; height: 10px; background: #999"/>
<script type="text/javascript">
let count = 0;
function step() {