Draw Rectangle And Line On PictureBox On Button Clicks
May 29, 2012
I have a form in which I draw a rectangle and a line depending on the button click. I basically want a dynamic line/ rectangle that moves when the mouse is clicked on another point on the picturebox. I found some code online for a rectangle, and I'm trying to extend it to draw a line too, but i'm having some issues. The line is not displayed when the mouse is lifted(mouse up event).
Here's my code:
Public Class Form1
Dim selection As Rectangle = Nothing
Dim m_Drawing As Boolean = False
Dim m_Start As Point
Dim square_click As Boolean = False
[Code] ......
I have a form that uses a button to draw a line and a second button to draw a rectangle. I have a third button to clear the form but can't find a code example to code the Clear button.
I am trying to draw a rectangle in a PictureBox (100 x 50)
Using gr As System.Drawing.Graphics = Picbox.CreateGraphics Dim rect As New System.Drawing.Rectangle(10, 10, 80, 30) gr.DrawRectangle(Drawing.Pens.Blue, rect) End Using
From looking at the examples in my book, I "think" it should work, but alas, tis not working - nothing is drawn.
This code is used to demonstrate drawing a blue border around a picture box...(I've numbered the lines so I can refer to them below
1 Dim objGraphics As Graphics 2 objGraphics = Me.CreateGraphics 3 objGraphics.Clear(SystemColors.Control)
[code]....
Regarding line 1, the author says, "To instantiate an object in code, you create a variable that holds a reference to an instantiated object".!Regarding line 2, he says "the CreateGraphics method is pretty complicated, but for now, just know that it instantiates a new object that represents the client area of the current form".So now I have two new instances, the one from line 1 - an instance of a graphics object, and this one from line 2 representing the client area of the form.The rest of it is pretty clear; But Why can't I draw the rectangle around the picturebox itself? Why do I have to draw it around the "instance" of the picture box?
Actually I'm creating a simple paint application in VB.Net 2010. I want to draw shapes in my application same as we do in Microsoft Paint using mouse.
I'm a bit successful also using mousedown and mouseup events of a picture box. The mousedown event sets the starting point and mouseup event sets the ending point(diagonally opposite point of rectangle.) The problem is "Nothing seems to be occuring between mousedown and mouseup events(Well..that is obvious because I didn't add any code on mousemove event). My question is: "Can I do something to see a growing rectangle during mousemove event?". The rest of the drawing should remain unaffected.
In VB6 I used some pattern of programming..I passed the picturebox as parameter to some procedure in some class and inside this procedure paint all needed graphics using this class methods.Now I want upgrade my application to vb.netBut all samples for line drawing show me how to draw inside paint event.[code]
Let's say i have a textbox, a button and a picturebox on my form. What I want is if I put a value on the textbox a line is drawn in the picturebox. So for every value in the textbox a line is drawn according to that value. How can I do this on VS2008.
how to draw in realtime? I have this code in a timer:
Dim picBoxWidth As Integer = PictureBox1.Size.Width Dim picBoxHeight As Integer = PictureBox1.Size.Height Dim halfWidth As Integer = PictureBox1.Size.Width / 2 Dim halfHeight As Integer = PictureBox1.Size.Height / 2
[code]....
this would draw a graph, and when x has counted to 1000 it should start again. The center cross is written, but no graph.
I am working on a Text editor. The problem I have come to, is that when a user clicks a button, I want all the text to be displayed on one line. The reason for this is I am having problems being able to upload CSV email files on a website I am working on, because the format isn't like email, email, email, email. Instead it is like
email, email, email,
So I have written a program that will format it. Only It still isn't working. I need it to recognise when there is a ".com," or something.
I have this code that tries to kill the wampmanager process when the user press on a buttonBut how can I achieve the same thing if the user clicks on the close button. Is it possible to execute a small line of code just when the user clicks on the close button?If you know any alternatives in
Dim pProcess() As Process = System.Diagnostics.Process.GetProcessesByName("wampmanager") For Each p As Process In pProcess p.Kill()
I have been trying to figure out how to do this program for a few days. Here is the question.Write a Windows application that allows the user to enter a seven-letter combination corresponding to that number in a multiple line TextBox when the user clicks the Generate Words button.Avoid phone numbers with the digits 0&1.
I got some help from my instructor but I can't get anything in the listbox?
I have a datagridview in my application. and I have created a function for searching different words in datagridview. When the functionfind the word in one cell of datagridview, the cell is selected, but I want to draw a red rectangle in the selected cell when I found the searched value.
Public Class Form1 Private opsets As New List(Of OpSet) Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load opsets.Add(New OpSet(Me, 100, 300))
User launches the application, enters width of circle, then enters width and height of rectangle and presses the button. Then app draws the circle with rectangle inside of it (if it fits). App should output the coordinates x1;y1 , x1;y2 , x2;y1 , x2;y2 (corners of rectangle) somewhere on form and would be great if it could post those coordinates on x and y axes (optional).
i've found this code on the web that allow me to draw a rectangle and keep the Image inside this. But there is a way to make draw this rectangle in all the direction and not only from left to right and top to bottom?
Public Class frmSS Private Declare Auto Function BitBlt Lib "gdi32.dll" ( _ ByVal hdcDest As IntPtr, _
Since using the DrawArc function in GDI+ isn't very accurate when drawing a small rounded rectangle, I am using RoundRect instead.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim hDC As IntPtr = e.Graphics.GetHdc Dim rc As New Rectangle(10, 10, 64, 24)[code].....
This will draw a nice rounded rectangle, but it will also fill it with a white brush, erasing what I don't want to have erased.How can I draw this without erasing the inside of the rectangle?
I have drawn a diagram of lines on a panel using the g.DrawLine command. I want to be able to zoom in to the diagram and define the zoom area by two cursor picks. I get the coordinates of the picks and draw a rectangle using g.DrawRectangle. This works fine but as I move the cursor around, the rectangle becomes solid black (with all the DrawRectangle commands). In VB6 I used a rectangular shape on top of my diagram but you cannot do this in VB2008. I need something like drawing in XOR mode. Somehow as I move the cursor I need to undraw the old rectangle and draw the new rectangle.
In order to draw a text over a ComboBox (or whatever else), I override WndProc() and catch 0x000F message -- which is WM_PAINT.Code is like the following:
Protected Overrides Sub WndProc(ByRef m As Message) MyBase.WndProc(m) If m.Msg = &HF Then[code].....
It works very well, but there is a problem: if I drag parent window on a side of the screen (in order to hide a part of the window form), the visible part of my control is infinitely redrawn. This makes the text redrawn over itself. I suppose there is a way to draw only invalidated (hidden) part of the control. How can I do?
EDIT:Here is the problem in one picture: http:[url].....(it's a link since I can't post image for now.)
UPDATE: I tried using BeginPaint API, but the RECT structure included in the returned PAINTSTRUCT structure contains only zeros.
If m.Msg = WM_PAINT Then Dim ps As PAINTSTRUCT = New PAINTSTRUCT BeginPaint(Handle, ps)[code].....
Can I do something with that? I don't know how to proceed, in order to paint only invalidated area.
I'm using e.graphics in the Me.Paint event to draw a string in the form. There is a rectangle shape with gradient in the form, and the string is supposed to be drawn on top of the rectangle shape. However, when I run the program, the string is drawn under the rectangle shape, and is therefore invisible... How do I fix this?
I want to Draw an Rectangle on a PictureBox and after that I must be able to move this Rectangle around. I have made now that I can draw a Rectangle on a Picturebox via MouseDown and MouseMove Events, but I dont know how to Move the Rectangle.
Private Sub PictureBox1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseDown Try If e.Button = MouseButtons.Left Then cropX = e.X cropY = e.Y [Code] .....
i am making application for image cropping. where in this application i want to draw transparent rectangle on picture box.eg> you must have uploaded photo on orkut , when u upload the photo if photo is too big croping windows comes up and tranparent rectangle with resizable appears on image.similarly i want resizable rectangle on my picturebox where user can resize the rectangle and then user press crop button it crops off that much part.my question
1) how to draw transparent rectangle on picturebox
