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vb.net画矩形图 vb 画矩形
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vb.net画填充的方形矩形
Dim canvas As New ShapeContainer
' To draw anoval, substitute
' OvalShapefor RectangleShape.
DimtheShape As NewRectangleShape
' Set theform as the parent of the ShapeContainer.
canvas.Parent = Me
' Set theShapeContainer as the parent of the Shape.
theShape.Parent = canvas
' Set thesize of the shape.
theShape.Size = New System.Drawing.Size(200,300)
' Set thelocation of the shape.
theShape.Location = New System.Drawing.Point(100,100)
' To draw arounded rectangle, add the following code:
theShape.CornerRadius = 12
theShape.FillStyle = FillStyle.Solid
theShape.FillColor = Color.Red
相关问答
Q1: vb的画矩形图问题
Pic1.Line (100, 100)-(100 + a, 100 + b), , BF
跟
Pic1.Line (100 + a, 100 + b)-(100, 100), , BF
的效果是一样的,只不过是把起点和终点对换过来而已(就像数学中从A点到B点画一条线段,跟从B点到A点画一条线段是一样的)。
BF是表示要画实心的矩形,如果是
Pic1.Line (100, 100)-(100 + a, 100 + b)
则是画一条线段。如果是
Pic1.Line (100, 100)-(100 + a, 100 + b), , B
则是画一个空心的矩形
pic1.Fillcolor = vbBottonFace是表示在Pic1中画图的时候,把标准按钮的表面颜色作为实心的封闭图形(圆、矩形、三角形等等)的填充色
Q2: 请教如何在VB中画一个填充有颜色的矩形(详细一点)
使用Line 方法
在对象上画直线和矩形。
语法
object.Line [Step] (x1, 1) [Step] (x2, y2), [color], [B][F]
Line 方法的语法有以下对象限定符和部分:
部分 描述
object 可选的。 对象表达式,其值为“应用于”列表中的对象。如果object 省略,具有焦点的窗体作为object。
Step 可选的。关键字,指定起点坐标,它们相对于由 CurrentX 和 CurrentY 属性提供的当前图形位置。
(x1, y1) 可选的。Single (单精度浮点数),直线或矩形的起点坐标。ScaleMode 属性决定了使用的度量单位。如果省略,线起始于由 CurrentX 和 CurrentY 指示的位置。
Step 可选的。关键字,指定相对于线的起点的终点坐标。
(x2, y2) 必需的。Single (单精度浮点数),直线或矩形的终点坐标。
color 可选的。Long (长整型数),画线时用的 RGB 颜色。如果它被省略,则使用 ForeColor 属性值。可用 RGB 函数或 QBColor 函数指定颜色。
B 可选的。如果包括,则利用对角坐标画出矩形。
F 可选的。如果使用了 B 选项,则 F 选项规定矩形以矩形边框的颜色填充。不能不用 B 而用 F。如果不用 F 光用 B,则矩形用当前的 FillColor 和 FillStyle 填充。FillStyle 的缺省值为 transparent。
例:
Private Sub Form_Load()
Me.AutoRedraw = True
Line (100, 100)-(2100, 2100), vbBlue, BF
End Sub
Q3: VB.NET我要用鼠标轨迹画一个矩形框 然后选中控件。就像星际和魔兽争霸里对部队单位的选中一样~等大神回答
这个类继承自Panel,把它加到你的项目里面,先运行一下,然后从工具箱里把它拖到窗体上,然后再向里面添加其它控件就可以了,支持Shift加选,Alt减选
Imports System.Linq
Imports System.Collections
Public Class MyPanel
Inherits Panel
' 选择模式,相交还是包含
Enum SelectMode
Intersects
Contains
End Enum
Dim down As New Point(-1, -1)
Dim rect As Rectangle
Dim selected As New List(Of Control)
Dim editting As IEnumerable(Of Control)
Dim mode As SelectMode = SelectMode.Contains
Dim shift, alt As Boolean
Public Sub New()
Me.DoubleBuffered = True
End Sub
Protected Overrides Sub OnMouseDown(e As MouseEventArgs)
MyBase.OnMouseDown(e)
down = e.Location
editting = selected.ToArray().ToList()
OnMouseMove(e)
End Sub
Protected Overrides Sub OnMouseMove(e As MouseEventArgs)
MyBase.OnMouseMove(e)
If e.Button = Windows.Forms.MouseButtons.Left Then
Dim loc As New Point(Math.Min(down.X, e.X), Math.Min(down.Y, e.Y))
Dim size As New Size(Math.Abs(down.X - e.X), Math.Abs(down.Y - e.Y))
rect = New Rectangle(loc, size)
Dim cs As New List(Of Control)
For Each c In Controls
cs.Add(c)
Next
Dim a = cs.Where(Function(n As Control) (mode = SelectMode.Contains And rect.Contains(n.Bounds)) Or (mode = SelectMode.Intersects And rect.IntersectsWith(n.Bounds)))
If shift Then editting = a.Union(selected) Else If alt Then editting = selected.Except(a) Else editting = a
Invalidate()
End If
End Sub
Protected Overrides Sub OnMouseUp(e As MouseEventArgs)
MyBase.OnMouseUp(e)
down = New Point(-1, -1)
selected = editting.ToList()
editting = Nothing
Invalidate()
End Sub
Protected Overrides Function ProcessKeyPreview(ByRef m As Message) As Boolean
Dim KeyCode As Keys = CInt(m.WParam) And CInt(Keys.KeyCode)
Dim d As Boolean
If m.Msg = H100 Or m.Msg = H104 Then d = True Else If m.Msg = H101 Or m.Msg = H105 Then d = False Else Return MyBase.ProcessKeyPreview(m)
If KeyCode = Keys.ShiftKey Then
shift = d
ElseIf KeyCode = Keys.Menu Then
alt = d
End If
Return MyBase.ProcessKeyPreview(m)
End Function
Protected Overrides Sub OnPaint(e As PaintEventArgs)
MyBase.OnPaint(e)
For Each c As Control In IIf(editting Is Nothing, selected, editting)
e.Graphics.DrawRectangle(New Pen(Color.Gray) With {.DashStyle = Drawing2D.DashStyle.DashDot}, c.Left - 1, c.Top - 1, c.Width + 1, c.Height + 1)
Next
If (down.X 0) Then e.Graphics.DrawRectangle(New Pen(Color.Gray) With {.DashStyle = Drawing2D.DashStyle.DashDot}, rect)
End Sub
End Class
Q4: vb.net画一个矩形图片的代码
g = Me.picDisplay.CreateGraphics
Dim mybrush As Brush = New SolidBrush(Map_Empty_Color)
Dim rect2 As System.Drawing.Rectangle = New System.Drawing.Rectangle(0, 0, Map_Width, Map_Height)
g.FillRectangle(mybrush, rect2)
Q5: 请问如何用vb的图片框画图?要求是鼠标按下来画矩形、圆之类的图(旁边有单选按钮来选择图形)。
Dim x1 As Single, y1 As Single, s As Integer
Const pi = 3.14159265
Private Sub Form_Load()
Command1.Caption = "圆"
Command2.Caption = "矩形"
Command3.Caption = "三角"
Command4.Caption = "五角"
Command5.Caption = "清"
End Sub
Private Sub Command1_Click()
s = 1
End Sub
Private Sub Command2_Click()
s = 2
End Sub
Private Sub Command3_Click()
s = 3
End Sub
Private Sub Command4_Click()
s = 4
End Sub
Private Sub Command5_Click()
Picture1.Cls
End Sub
Private Sub Picture1_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)
If Button = 1 Then x1 = x: y1 = y
End Sub
Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, x As Single, y As Single)
If Button = 1 Then
Picture1.AutoRedraw = False
Picture1.Refresh
Picture1.PSet (x1, y1)
Select Case s
Case 1
Picture1.Circle (x1, y1), Sqr((x - x1) ^ 2 + (y - y1) ^ 2)
Case 2
Picture1.Line (x1, y1)-(x, y), , B
Case 3
duobianxing x1, y1, x, y, 3, 60
Case 4
duobianxing x1, y1, x, y, 5, 36
End Select
End If
End Sub
Private Sub Picture1_MouseUp(Button As Integer, Shift As Integer, x As Single, y As Single)
If Button = 1 Then
Picture1.AutoRedraw = True
Select Case s
Case 1
Picture1.Circle (x1, y1), Sqr((x - x1) ^ 2 + (y - y1) ^ 2)
Case 2
Picture1.Line (x1, y1)-(x, y), , B
Case 3
duobianxing x1, y1, x, y, 3, 60
Case 4
duobianxing x1, y1, x, y, 5, 36
End Select
End If
End Sub
'duobianxing函数参数vb.net画矩形图:
'zhongxinX-多边形中心vb.net画矩形图的横坐标
'zhongxinY-多边形中心vb.net画矩形图的纵坐标
'dingdianX-多边形一个顶点的横坐标
'dingdianY-多边形一个顶点的纵坐标
'bianhuoxing-正多边形的边数或者星形的星角数vb.net画矩形图,例如biaohuoxing=5,dingjiao=72则为正五边形,若dingjiao=36则为五角星(该函数将正多边形按相邻顶角点间的折点成直线的特殊星形绘制)
'dingjiao-多边形的顶角的角度(角度制°)
Function duobianxing(ByVal zhongxinX As Single, ByVal zhongxinY As Single, ByVal dingdianX As Single, ByVal dingdianY As Single, ByVal bianhuoxing As Integer, ByVal dingjiao As Single)
If bianhuoxing = 0 Then Exit Function
l = Sqr((zhongxinX - dingdianX) ^ 2 + (zhongxinY - dingdianY) ^ 2) '星形中心到顶角距离
t1 = Abs(Tan((dingjiao / 2) * pi / 180)) '星形顶角的1/2求正切
t2 = Abs(Tan((360 / (2 * bianhuoxing)) * pi / 180)) '星形每条边所对应的中心角的1/2求正切
r = l * t2 / (t1 + t2) / Cos((dingjiao / 2) * pi / 180) '星形边长
If zhongxinX = dingdianX Then '求星形中心到顶角这条线的角度j
j = IIf(dingdianY zhongxinY, 90, -90)
Else
j = Atn((zhongxinY - dingdianY) / (dingdianX - zhongxinX)) * 180 / pi
If dingdianX zhongxinX Then
If dingdianY zhongxinY Then
j = j - 180
Else
j = j + 180
End If
End If
End If
j1 = j - dingjiao / 2 '边偏离初始角1
j2 = 360 / bianhuoxing + dingjiao + j - dingjiao / 2 '边偏离初始角2(如果是正多边形j1=j2)
px1 = dingdianX: py1 = dingdianY '指定星形的第一个顶点
For i = 1 To bianhuoxing * 2
If i Mod 2 = 0 Then
px2 = px1 + r * Cos(j2 * pi / 180): py2 = py1 - r * Sin(j2 * pi / 180) '指定星形下一个顶点
j2 = j2 + 360 / bianhuoxing '边偏角+2个边长对应的中心角
Else
px2 = px1 - r * Cos(j1 * pi / 180): py2 = py1 + r * Sin(j1 * pi / 180)
j1 = j1 + 360 / bianhuoxing
End If
Picture1.Line (px1, py1)-(px2, py2) '画线
px1 = px2: py1 = py2
Next
End Function
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