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标题:在窗体上所画圆的边界上按下鼠标左键,拖动鼠标到圆心处松开鼠标左键,以松 ...
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prk
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在窗体上所画圆的边界上按下鼠标左键,拖动鼠标到圆心处松开鼠标左键,以松开鼠标左
在窗体上所画圆的边界上按下鼠标左键,拖动鼠标到圆心处松开鼠标左键,以松开鼠标左键到按下鼠标左键位置之间为半径,画出圆。
搜索更多相关主题的帖子: 鼠标 左键 拖动 圆心 窗体 
2005-04-17 20:43
griefforyou
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Option Explicit

Private Type POINT X As Long Y As Long End Type

Dim MouseDownFlag As Boolean Dim OldPos As POINT Dim Pos1 As POINT, Pos2 As POINT

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = 1 Then MouseDownFlag = True Pos1.X = X Pos1.Y = Y End If End Sub

Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single) If MouseDownFlag = True Then Me.Line (Pos1.X, Pos1.Y)-(OldPos.X, OldPos.Y), Me.BackColor Me.Line (Pos1.X, Pos1.Y)-(X, Y), Me.ForeColor OldPos.X = X OldPos.Y = Y End If End Sub

Private Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single) If Button = 1 Then Pos2.X = X Pos2.Y = Y Call DrawCircle(Pos1, Pos2) End If MouseDownFlag = False End Sub

Private Sub DrawCircle(Pos1 As POINT, Pos2 As POINT) Me.Circle (Pos2.X, Pos2.Y), ((Pos1.X - Pos2.X) * (Pos1.X - Pos2.X) + (Pos1.Y - Pos2.Y) * (Pos1.Y - Pos2.Y)) ^ 0.5 End Sub


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2005-04-17 22:21
prk
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谢谢版主啊
2005-04-18 12:49
doudouhan
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版主同志:
    我还要问一下,如果我只想让这个圆显示一下,然后马上删掉,丢失所说的状态线框该如何实现呢?
2005-05-01 15:03
快速回复:在窗体上所画圆的边界上按下鼠标左键,拖动鼠标到圆心处松开鼠标左键, ...
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