جامعة نزوى · web viewdim mygraphics as drawing.graphics = me.creategraphics dim mypen as...

Introduction to Visual Programming–COMP300LAB 8_graphics

Graphics Project.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles

Button1.Click

Dim mygraphics As Graphics = Me.CreateGraphics

Dim mypen As Pen

mypen = New Pen(Brushes.Blue, 10)

mygraphics.DrawLine(mypen, 10, 10, 100, 10)

End Sub

Dim myGraphics As Graphics = Me.CreateGraphics

Dim myPen As Pen

myPen = New Pen(Brushes.DarkMagenta, 10)

myGraphics.DrawLine(myPen, 10, 10, 100, 10)




Pg-1 Department of Computer Science, College of Art and Sciences, University of NIZWA



Dim myPen1 As Pen

myPen1 = New Pen(Drawing.Color.Blue, 5)

myGraphics.DrawRectangle(myPen1, 10, 10, 100, 50)


Dim myPen As Pen

myPen = New Pen(Drawing.Color.Red, 5)

myPen.DashStyle = Drawing.Drawing2D.DashStyle.Dot

myGraphics.DrawRectangle(myPen, 10, 10, 100, 50)

The possible values of the line DashStyle of the Pen are listed in the below:

Dot, Dash, DashDot, DashDotDot, Solid, Custom




Dim myPen As Pen

Dim myRectangle As New Rectangle

myPen = New Pen(Drawing.Color.Blue, 5)

myRectangle.X = 10

myRectangle.Y = 10

myRectangle.Width = 120

myRectangle.Height = 70

myGraphics.DrawEllipse(myPen, myRectangle)


Dim myPen As Pen


myGraphics.DrawEllipse(myPen, 10, 10, 120, 70)




Dim myPen As Pen

Dim myRectangle As New Rectangle


myRectangle.X = 10

myRectangle.Y = 10

myRectangle.Width = 100

myRectangle.Height = 100

myGraphics.DrawEllipse(myPen, myRectangle)


Dim myPen As Pen


myGraphics.DrawEllipse(myPen, 10, 10, 100, 100)



To create the Font object in Visual Basic 2010


Dim myFont As Font

Dim myBrush As Brush

myBrush = New Drawing.SolidBrush(Color.DarkOrchid)

myFont = New System.Drawing.Font("Verdana", 20, FontStyle.Underline)

myGraphics.DrawString("Visual Basic 2010", myFont, myBrush, 10, 10)

InputBoxYou can also add a InputBox which let the user enter his or her message then display the

message on the screen.

Example.Dim myGraphics As Graphics = Me.CreateGraphics

Dim myFont As Font


Dim userMsg As String

userMsg = InputBox("your message?", "Message Entry Form", "Enter your message", 100, 200)

myBrush = New Drawing.SolidBrush(Color.DarkOrchid)

myFont = New System.Drawing.Font("Verdana", 20, FontStyle.Underline)

myGraphics.DrawString(userMsg, myFont, myBrush, 10, 10)

End Sub



Drawing a QuadrilateralA quadrilateral is a polygon consists of four sides, so you need to define four vertices. The

following is the code:

Example.Dim myGraphics As Drawing.Graphics = Me.CreateGraphics

Dim myPen As Pen

Dim A As New Point(10, 10)

Dim B As New Point(100, 50)

Dim C As New Point(120, 150)

Dim D As New Point(60, 200)

Dim myPoints As Point() = {A, B, C, D}


myGraphics.DrawPolygon(myPen, myPoints)

Drawing a pie that starts with 0 degree and sweep clockwise through 60 degree.

ExampleDim myGraphics As Drawing.Graphics = Me.CreateGraphics

Dim myPen As Pen


myGraphics.DrawPie(myPen, 50,50, 150,150,0,60)



Drawing and Filling a Rectangle

The syntax to fill a rectangle with the color defined by the brush object is:

myGraphics.FillRectangle (myBrush, 0, 0, 150, 150)ExampleDim myGraphics As Drawing.Graphics = Me.CreateGraphics

Dim myPen As Pen



myBrush = New SolidBrush(Color.Coral)

myGraphics.DrawRectangle(myPen, 20, 20, 50, 50)

myGraphics.FillRectangle(myBrush, 20, 20, 50, 50)

Example

Private Sub Form1_Paint(sender As Object, e As System.Windows.Forms.PaintEventArgs) Handles

Me.Paint

e.Graphics.DrawRectangle(Pens.Black, New Rectangle(1, 1, 100, 100))

e.Graphics.DrawLine(Pens.Blue, New Point(120, 120), New Point(200, 120))

e.Graphics.DrawString("string is text", Me.Font, Brushes.Brown, New Point(120, 120))

e.Graphics.FillRectangle(Brushes.Aqua, New Rectangle(20, 20, 50, 50))

' e.Graphics.Clear(Me.BackColor)

End Sub


جامعة نزوى · web viewdim mygraphics as drawing.graphics = me.creategraphics dim mypen as...

Documents