VB实现鼠标绘图实例代码
<p>本文所述为VB实现鼠标绘图的实例，该实例实现线条颜色和线宽可自设，当按下鼠标按键时绘图开始并记录最初的起点，如果不是处在绘图状态则退出该过程，如果处在绘图状态则从起点到目前鼠标所在点绘制直线，然后将当前鼠标所在点作为新的起点，当释放鼠标按键时绘图结束。</p><p>具体的功能代码如下：</p>
<div class="jb51code">
<pre class="brush:vb;">
VERSION 5.00
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "comdlg32.ocx"
Begin VB.Form Form1
Caption ="鼠标绘图"
ClientHeight=6420
ClientLeft =60
ClientTop =345
ClientWidth =7710
LinkTopic ="Form1"
ScaleHeight =6420
ScaleWidth =7710
StartUpPosition =3 '窗口缺省
Begin VB.CommandButton Command2
Caption ="清除"
Height =495
Left =5640
TabIndex =7
Top =1440
Width =1335
End
Begin VB.Frame Frame1
Caption ="线宽"
Height =2655
Left =5520
TabIndex =2
Top =2880
Width =1935
Begin VB.OptionButton Option4
Caption ="8"
Height =495
Left =240
TabIndex =6
Top =1800
Width =1215
End
Begin VB.OptionButton Option3
Caption ="4"
Height =375
Left =240
TabIndex =5
Top =1320
Width =1335
End
Begin VB.OptionButton Option2
Caption ="2"
Height =375
Left =240
TabIndex =4
Top =840
Width =1095
End
Begin VB.OptionButton Option1
Caption ="1"
Height =255
Left =240
TabIndex =3
Top =480
Value =-1 'True
Width =1335
End
End
Begin VB.CommandButton Command1
Caption ="设置颜色"
Height =495
Left =5640
TabIndex =1
Top =600
Width =1215
End
Begin MSComDlg.CommonDialog CommonDialog1
Left =4200
Top =3840
_ExtentX =847
_ExtentY =847
_Version =393216
End
Begin VB.PictureBox Picture1
Height =5535
Left =480
ScaleHeight =5475
ScaleWidth =4515
TabIndex =0
Top =480
Width =4575
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim x1 As Integer'起点X坐标
Dim y1 As Integer'起点Y坐标
Dim x2 As Integer'终点点X坐标
Dim y2 As Integer'终点Y坐标
Dim flag As Boolean '绘图标志
'设置线的颜色
Private Sub Command1_Click()
On Error Resume Next
CommonDialog1.CancelError = True
CommonDialog1.DialogTitle = "颜色"
CommonDialog1.ShowColor
If Err <> 32755 Then
Picture1.ForeColor = CommonDialog1.Color
End If
End Sub
'清除Picture1中的图形
Private Sub Command2_Click()
Picture1.Cls
End Sub
'设置线宽
Private Sub Option1_Click()
Picture1.DrawWidth = 1
End Sub
Private Sub Option2_Click()
Picture1.DrawWidth = 2
End Sub
Private Sub Option3_Click()
Picture1.DrawWidth = 4
End Sub
Private Sub Option4_Click()
Picture1.DrawWidth = 8
End Sub
Private Sub Form_Load()
Picture1.Scale (0, 0)-(400, 400)
flag = False
End Sub
Private Sub Picture1_MouseDown(Button As Integer, Shift As Integer, _X As Single, Y As Single)
'当按下鼠标按键时绘图开始并记录最初的起点
flag = True
x1 = X
y1 = Y
End Sub
Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, _X As Single, Y As Single)
'如果不是处在绘图状态则退出该过程
'如果处在绘图状态则从起点到目前鼠标所在点绘制直线
'然后将当前鼠标所在点作为新的起点
If flag = False Then
Exit Sub
End If
If flag = True Then
x2 = X
y2 = Y
Picture1.Line (x1, y1)-(x2, y2)
x1 = x2
y1 = y2
End If
End Sub
Private Sub Picture1_MouseUp(Button As Integer, Shift As Integer, _X As Single, Y As Single)
'当释放鼠标按键时绘图结束
flag = False
End Sub
</pre>
</div>
<p>程序中备有较为详细的注释，相信读者不难理解，读者可以根据自己的喜好对该程序进行修改，使之更加完善！</p>
<div class="art_xg">
<b>您可能感兴趣的文章:</b><ul><li>VB6反编译软件VB RezQV2.4a 正式版注册码</li><li>用VBS控制鼠标的实现代码（获取鼠标坐标、鼠标移动、鼠标单击、鼠标双击、鼠标右击）</li><li>VB6.0 支持鼠标滚轮教程</li></ul>
</div>
</div>
<!--endmain-->
頁:
[1]