I am writing an application that is talking to a PMAC card control servo motors. The motors run in an x,y plane where 0,0 is lower left. I would like to be able to draw what I am about to send the card on the screen. All I have are lines and arcs. I have had no luck getting the top left origin to change, or my arcs to draw correctly. Is there any libraries out there that would help with what I want to do.
View 5 RepliesI have to make a lot of retangular boxes to make my program neat but i'm having a problem of adding boxes. I tried using the draw event in the tab page but everytime i scroll it will draw the lines again and messes up everything. Also when making a line greater that the tab page, autoscroll won't work.Is there a way to make lines or boxes in design time?
View 4 RepliesI have a VB.NET Windows Forms app with a logo image on the form as a System.Drawing.Bitmap inside a PictureBox.I used the Visual Studio Designer to add the logo .bmp image so I don't currently have any VB code doing anything with it.I'd like to make the current logo a clickable object/button so when I click on it a file browser dialog opens and I can select a new image to replace the current image.The current image is a local resource and is set in a PictureBox as a System.Drawing.Bitmap.How would I replace that System.Drawing.Bitmap with a file selected from the file browser dialog?
View 1 Repliesdraw individual pixels, without resorting to drawing a line and setting it's length to 1. Is there an actual ability to draw a pixel that is just 1 pixel big?
View 2 RepliesI need some code to draw a resizable, draggable rectangular cursor (or selection box) on a picturebox. I found some excellent code (albeit rather old) that does just that, but on a form rather than a picturebox. I have tried converting the code - basically moving things to the picturebox events (Paint, MouseDown, MouseMove etc). It nearly works but leaves a trail behind it when you move or resize the cursor. In other words, the selection rectangle is not being erased before being drawn in the new position.
Is there some fundamental difference between drawing graphics on a form and drawing on a picturebox that would cause this behaviour? Something like, when you invalidate a form and cause a redraw it erases what you did last? If not, then I just need to dig a bit further and work out how the cursor is being erased from the previous position.
Here's the original code that works fine on a form:
Private DragRect As New RectangleF(20, 20, 100, 80)
Private Adornments(7) As RectangleF
Private MouseInRect As Boolean = False
[Code]....
Say I have 3 Buttons, labelled: Unit 1, Unit 2 and Unit 3. When I click on any button I want a drawing of that unit to appear on screen at a pre-specified starting point. Thereafter when I press any other one of the buttons the unit drawings appear alongside each other in a line. So I could end up with:
[Code]...
With this line...
If PictureBox1.Image = My.Resources._2star Then
I get this error: Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Drawing.Bitmap'.Is there another way to say = with images?
Is it possible to convert an object form System.Drawing.Graphics to System.Drawing.Image?
View 4 RepliesHere is my favicon code
Dim oURL As Uri = New Uri(e.Uri.AbsoluteUri)
Dim favicon As Image
If oURL.HostNameType = UriHostNameType.Dns Then
[code]....
The error is Value of type System.Drawing.Image cannot be converted to System.Drawing.Icon Is it even possible to make the favicon be the icon of the form?
im using an MDI parent form and MDI Child. how can i print the image that's inside a picture box that's inside the Child from a button that's on the Parent?when i try to use print preview or print dialog, i can't get it to recognize that the document is the picure inside the picture box. i've looked up this error message:Value of type 'System.Drawing.Image' cannot be converted to 'System.Drawing.Printing.PrintDocument'.[code]
View 6 RepliesI am making a web browser using geckofx. I have put the favicon in a picture box but I have changed my mind and now I want it as the form's icon. The code for the favicon is:[code...]
The favicon works fine in the picture box but i think it will look better as an icon. If i change the line Me.PictureBox1.Image = favicon to Form1.icon = favicon I get the error Value of type 'System.Drawing.Image' cannot be converted to 'System.Drawing.Icon'. How can I get this to work?
I have a System.Drawing.Graphics g, which draw something in a PictureBox. Now I want to export this pGraphics to a new System.DrawingImage pImage (or Bitmap). But how?
Dim pImage As Bitmap
Dim g As Graphics
g = Graphics.FromImage(b)
[Code].....
I have two graphics I'm trying to superimpose into one, then display in a DataGridViewImage cell...The Value property of a DataGridViewImage is an Image type.
Dim Image1 As System.Drawing.Image = imgl_Imagelist1.Images(0)
Dim Image2 As New Bitmap(imgl_ImageList2.Images(0))
Dim DualGraphic As Graphics = Graphics.FromImage(Image1)
[code].....
I have made an application that can render and save a given element.
[Code]....
This works great except I have to specify which element I want, and I essentially want all of them. Is there some sort of for each that could iterate through all the possible elements?
(Edit: to clarify, my main goal is concurrency, but not necessarily for multi-core machines)
I'm fairly new to all concepts on concurrency, but I figured out I needed to have parallel drawing routines, for a number of reasons:
I wanted to draw different portions of a graphic separatedly (background refreshed less often than foreground, kept on a buffer). I wanted control about priority (More priority to UI responsiveness than drawing a complex graph). I wanted to have per-frame drawing calculations multithreaded. I wanted to offer cancelling for complex on-buffer drawing routines.
However, being such a beginner, my code soon looked like a mess and refactoring or bug-fixing became so awkward that I decided I need to play more with it before doing anything serious.
So, I'd like to know how to make clean, easy to mantain .NET multithreaded code that makes sense when I look at it after waking up the next day. The bigest issue I had was structuring the application so all parts talk to each other in a smart (as opposed to awkward and hacky) way.
I have a preference for sources that I can digest in my free time (e.g., not a 500+ pages treatise on concurrency) and for C#/VB.NET, up to the latest version (since I see there have been advances). Basically I want something straight to the point so I can get started by playing with the concepts on my toy projects.
I want to write a sub in VB like this
[code]...
mainCanvas is a canvas object on the form class, But this does not work.
How can I draw an image in a program using visual basic, without actually drawing the image first on an graphics program or on paper?
View 2 RepliesHowever my m8 will support me with any problems about the server, but he doesn't know how to fix this one in the client.The Sub have to create random sized circles, which are showed when u just hit some **** in space.It works fine in VB6, but in .NET i got a lot of ISSUES:
Sub DrawHitCircles(ByRef accuracy As Short)
Dim GO As Single
Dim check As Short
Dim guns As Short
[code]....
I drew some shapes on a picture box , then when i move the form outside the bounds of the screen or move another form on it , all the shapes go away.I am using "CreateGraphics" to create the shapes.How can i keep the shapes on the picture box?
View 6 RepliesMy objective here is to paint an image onto a certain part of ANOTHER image. So I'm technically trying to copy one picturebox to another one.
View 1 RepliesImports System.Runtime.InteropServices
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
[code]....
what i'm trying to do is make sort of a picturebox game. I have a picturebox name p1 that i got to move with the arrow keys on the keyboard. What I was tryna do next was to have it so that whenever I pressed the spacebar on that a new picturebox would be created, originate from p1's location and then go up 5 pixels at a time. so here's my code that i tried;
Dim Loc As Point
Dim shot2 As New PictureBox
If e.KeyCode = Windows.Forms.Keys.Space Then
shot2.Visible = True
[code].....
I have that under the keydown event by the way. So even thou vb didnt have conflicts with my code. But when I press the spacebar nothing happens.
How could I create a bitmap which is initially completely transparent. I would then like to do some drawing to it, like g.drawImage() and then I would like to save it as a png. How could I do this?
View 1 RepliesI am trying to draw in visual basic express edition 2008.... I have this code:
[Code]...
In a simple hang man game I am I have a a method called wrong(). In this method I increase an integer variable (wrongGuesses) by one and Panel1 is refreshed. Panel1 is the control that I am drawing the actual hangman on and in its paint event I'm using a Select Case structure to draw each part. Here is my code for the wrong() method and the Panel1 paint event.
The problem I'm having is that every time Panel1 is refreshed everything is erased and and the paint event only draws a single part (head, body, left arm, etc). I realize I could redraw the entire stick man every time, but that seems inefficient. Also, I realize that I could Invalidate() each part of the stick man and then Update(), but that I was hoping for a simpler method.
[Code]...
How to used drawing tool box in vb.net. i want to design graph page to used Ellipse,Rectangle, lines etc. as par Requirement not particular size and draw mouse
View 1 RepliesI was trying to create an application implementing the Douglas Peucker algorithm in VB.NET. I already finished coding the program and tried to compile it but when I try to draw on the form, it is not working. My source code is below, I just want to ask if there are some missing code or are there any code I have to include, or there are "WRONG" codes I've included.
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
[Code]......
I have drawn a rectangle using GDI+ but I need to move the rectangle with the arrow keys. I have the code to do it, but there is something wrong with the code: the rectangle won't move.
[code]...
i use with this code:
Declare Function GetDesktopWindow Lib "user32" Alias "GetDesktopWindow" () As IntPtr
Dim g As System.Drawing.Graphics
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[code].....
I have drawn a bunch of squares with GDI+, but what I want to do is when somebody goes over one of the squares, that square changes it's color.
View 4 Replies