C#如何在运行时通过鼠标拖动改变控件的大小

最新推荐文章于 2020-05-13 13:11:20 发布

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最新推荐文章于 2020-05-13 13:11:20 发布 · 1.4k 阅读

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#c# #object #null #class #c

本文介绍了一个C#类ResizeAction，该类允许在运行时通过鼠标拖动来改变Windows Forms控件的大小。通过在控件的MouseDown、MouseMove和MouseUp事件中处理鼠标操作，实现控件的移动和尺寸调整效果。

类:

using System; using System.Collections.Generic; using System.Text; using System.Windows.Forms; using System.Drawing; namespace DataGridViewPrinterApplication { class ResizeAction { bool IsMoving = false; int ctrlLastWidth = 0; int ctrlLastHeight = 0; int ctrlWidth; int ctrlHeight; int ctrlLeft; int ctrlTop; int cursorL; int cursorT; int ctrlLastLeft; int ctrlLastTop; int Htap; int Wtap; bool ctrlIsResizing = false; System.Drawing.Rectangle ctrlRectangle = new System.Drawing.Rectangle(); private Control ctrl; private Form frm; public ResizeAction(Control c, Form frm) { ctrl = c; this.frm = frm; this.Htap = this.frm.Height - this.frm.ClientRectangle.Height; this.Wtap = this.frm.Width - this.frm.ClientRectangle.Width; ctrl.MouseDown += new MouseEventHandler(MouseDown); ctrl.MouseMove += new MouseEventHandler(MouseMove); ctrl.MouseUp += new MouseEventHandler(MouseUp); } public void MouseMove(object sender, MouseEventArgs e) { if (frm == null) return; if (e.Button == MouseButtons.Left) { if (this.IsMoving) {

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