Draw On A Picturebox Outside Of The Pain Event?
Aug 25, 2010
Basically Im converting my old VB6 chip8 emulator into Vs2010 version, so far everything works except the drawing routine.In Vb6 it was easy, simply pict1.line(x1,y1)-(x2,y2),vbwhite, BF etc..I could write to the picture box directly within a different sub called from main() and also call the form refresh etc.In Vb2010 it seems entirely different, you create a graphics object.Dim g as graphics Then assign it to an object with the create graphics method g=picturebox1.creategraphics then use g.drawline etc.. <<< this normally goes in the paint event of the object.The problem im having is that nothing displays until the paint event, which is not how my code works.Basically the emulator procedure framework is:-
LoadRom
Initialise stuff
Emulate
-Fetch opcodes
[code]....
As I try to draw on the picture box from within the DrawRoutine sub nothing displays, is there something else needed to cause a draw event to happen?
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Feb 14, 2012
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.
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Jul 17, 2010
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]
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Jan 4, 2011
I am trying to draw a line on top of a picturebox but it keeps going behind the picturebox, even when I do Line.BringToFront()
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Nov 15, 2010
I know when I draw to the form and add controls I get a flicker effect.If I draw to a picturebox on the form and add controls will the picturebox flicker?
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Aug 24, 2006
ContextSwitchDeadlock was detectedMessage: The CLR has been unable to transition from COM context 0x1b0a08 to COM context 0x1b0b78 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
When I pause processing, and go into the immediate window to try something, I have 60 seconds before execution effectivly hangs, which makes debugging frustrating, to say the least.
Can anybody tells me what this nonsense means? I have a little app reading a file, no thread, no timers, nothing more complicated than basic data processing.
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Apr 8, 2009
How to draw a bitmap in a picturebox based on coordinates of the bitmap inside the picturebox not the form
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Oct 5, 2009
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.
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Apr 1, 2011
draw an image in my picturebox. Is it possible to give it an opacity attribute? I have been looking at the other versions of DrawImage but couldn't find such thing!
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Oct 30, 2010
trying to Draw an image to a picturebox using DrawImage(image,0,0, picturebox.width, picturebox.height).I know I have to use the PAINT argument but still having a little problem getting it to work.how to start the code?
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Mar 31, 2010
I have a picturebox on my form and I have added a references picture file into my project.
I need to code the Onpaint event handler for the picturebox so that it causes the picture (that i have added) to be drawn but using the picturebox Graphics object.[code]...
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May 1, 2010
I am trying to write a graphing program that will draw on/in a picturebox during the form_load event. It works if I connect the code to a button event and click the button but the exact same code in the form_load event seems to do nothing. I've tried calling cmdDraw.PerformClick() and cmdDraw_Click() and although the Draw button works when I physically click the button with the mouse, nothing seems to happen when these functions are called during the form_load.
[Code]...
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Oct 25, 2008
I'm making the transition from VB6 to VB2008 and I'm having difficulty finding the equivalent to[code]...
It seems in VB2008 I can only use pens inside a picturebox1_onpaint() subroutine, I can't tell a picturebox what to do from a button_click subroutine or form_load subroutine first and then send the results to a picturebox. I have no control over when the graphics are drawn and from which subroutine. How do I solve this in VB2008 ?
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Oct 30, 2011
How can i draw a rectangle in picturebox using coordinate(X , Y) and size of rectangle from textbox?
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Jul 20, 2009
In my application there's a PictureBox with a drawing inside. I implemented a zoom function that works in the following way:
- The user clicks somewhere in the PictureBox, and holds the button down. The program stores the cursor position.
- The user moves the mouse, while still holding the button down. The program draws a rectangle between the original and the current cursor position.
- The user moves the mouse further, while still holding the button down. The program deletes the last rectangle, and draws a new rectangle between the original and the current cursor position.
- The user releases the button. The program deletes the last rectangle, and executes the zooming based on the original and the current cursor position.
My problem is that I could only delete the rectangles by drawing same-sized, background-colored rectangles on top of them. But this also deleting the original drawing inside the PictureBox. Is there a way to draw "removable" rectangles?
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Apr 11, 2009
I have a simple picturebox, line drawing procedure (call it "DrawTheLine"), which fires ok when I call it from a command button. But when I try to call it from the boot form_load procedure it doesn't work; no lines draw. No errors are raised.
Things I've thought of are:
1. The form_load procedure is not done creating all of the controls on the form, so it can't work with them yet. Doesn't make sense because my drawing call is the last thing in the form_load procedure, and it executes, but the picturebox does not show the lines.
2. Tried Application.DoEvents, but no go.
3. Tried using picturebox.invalidate to force a paint event and "called" the drawing procedure that way, with the appropriate arguments. Again, the procedure "DrawTheLine" fires, but no lines draw to the picturebox.
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May 24, 2011
need to draw text (already writen) but the promblem is i need to save it after i wrote it as a .jpg i got the save feature complete but the text doesnt show up what do i need 2 change or do?
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Mar 29, 2011
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?
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Sep 16, 2009
i created a drawing apllication in my solution by this code.by this i can draw images in a picturebox and can to save. when i click the clearbutton the image on the picturebox is cleared but the problem is after clearing the image i can't draw any thing in the picturebox without the form's reload
[code]...
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Sep 11, 2009
How can I clear the image in a picturebox to draw a new image.
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May 13, 2011
I was wondering how to draw a image onto a picturebox using directx 9.0, and also how to draw multiple images and redraw images too, that have already been drawn. And maybe a tutorial on how to make a simple 2d game and maybe one how to make a 3d game.
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Jun 12, 2009
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.
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Jun 20, 2012
Wasn't exactly sure how to word the title of the topic the best without making it a really long title, so I just stayed with a brief general topic to lure you guys into it .Anyways, I am using VB.NET and I have a PictureBox inside a panel that is not initially visible. Whenever a user clicks a button, I set the panel to visible, and I use Direct3D9 to render to the PictureBox but it does not work right when I set the panel to visible. I added a PictureBox_Paint function to handle the Paint event, but nothing. An interesting thing is if I sleep for about 1 or 2 seconds after I set the panel to visible and before I draw the picture with DirectX, it will draw it on. So it must be something when it is first setting it to visible that is affecting it. I do not have an actual image inside the picturebox, I am just using it to draw with DirectX.I'm not exactly sure what events are called right when you set the picturebox to visible.
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Jun 15, 2010
Ok well im making a game maker =) but there are some problems that need to be fixed =(. Ok well the first one is bitmap, It takes up to make space and it has a size limit. Is there something like bitmap that will let me draw images onto a picturebox or something like that with unlimeted space and it deos not to up much memory space? cause there are some game makers with huge maps and they used visual c++ but how i dont know
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Jun 14, 2012
I've come across involving a PictureBox.I am trying to create a quick Paint-like application, but I want something to happen in it. I want it so that when you draw or have drawn in a certain area of the PictureBox, you trigger events to happen (but they must only trigger once. This doesn't mean only one event can happen, it's just that each event can only happen once). How would this be possible to implement in my code I have now?[code]
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Aug 29, 2010
how to draw a string on a picturebox ? i want to draw a peace of text in the x,y bounds of the picturebox?
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Mar 23, 2011
I'm trying to draw a string onto the bottom of a tiny picturebox. This is done for several different scale levels, but the smallest size doesn't draw correctly. Specifically, when the PB is 16 pixels wide, I can get one digit, but not two, so numbers like 10 show up as 1. This seems like a simple case of wrapping and clipping, so I tried to turn off both. This did not appear to work. I also tried scaling the string, but that didn't appear to do anything, either. Here's the
Dim alng As New StringFormat()
alng.Alignment = StringAlignment.Center
alng.FormatFlags = (StringFormatFlags.NoWrap Or StringFormatFlags.NoClip)
Dim stringSize = grph.MeasureString(st1, mMyFont, Point.Empty, alng)
[code]....
It may have to do with passing in a rectangle for a drawing area, but if I want to have the string center aligned to that space?
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Dec 17, 2009
I have a picture box. The user can click with in the picture box. Anywhere they click it will draw another Ellipse. The problem is the edges of the picture boxes cut the image of the newly drawn ellipse. Is there a way draw the new ellipse so the user can see the entire thing?
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Dec 14, 2010
A rectangle is painted in Sub pBox1_paint. My intent is to add data to pBox1 via 'drawstring' in Sub btnMoreThan30. The first line of Sub btnMoreThan30 originally included 'ByVal e As System.EventArgs'. The compiler flagged the phrase 'e.graphics' with the error:'Graphics' is not a member of 'System.EventArgs'. I then modified line 1 of this sub as it appears in the code below. The compiler finds no errors but when I click on button 'btnMoreThan30' I get the runtime error,'InvalidCastException was unhandled. 'Unable to cast object of type 'System.Windows.Forms.MouseEventArgs' to type 'System.Windows.Forms.PaintEventArgs'. How can I draw lines and strings in a picturebox from a button_click sub? Code follows:
Public Class frmScoreboard
Private pbox1 As New PictureBox()
Private Sub frmScoreboard_Load(ByVal sender As System.Object, _
[Code]....
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Apr 30, 2009
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.
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