Unable To Draw In A Picturebox After Clicking A Command Box?
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, _
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]
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?
I am working on making a picturebox that when clicked in a general location it will do something. Is there a way to make a grid out of a picture so when a certain slot on that grid is clicked an event will happen? It cant be an exact location, because that will be too hard to click. but a relative location would be perfect.
Something is going wrong, I have no idea what it is. I just simply want to draw over pacman so he can open and close his mouth, so there would be 5 pacman's, with different mouth positions.Note: The change of color was just to make sure I was seeing the results.)
let's say I have a btnX_click event calling each time when I click btnX:[code] I have menuX menu item and click event for it:[code]I just want every time when menuX item clicked on to do the same thing as btnX control does when clicked.I haven't been programming in VB for ages;Actually haven't been programming at all for a while..But definitely remember writing (calling command event without explicitly clicking on it) this in Delphi; but cannot remember how;
I'm writing a program in vb.net. The program can be started from another program by passing some arguments or it can be lauched by clicking .exe. I'd like to show the user some options depending on where he is coming.Is the below approach correct? [code]
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.
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!
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?
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]...
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.
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 ?
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?
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.
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?
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?
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
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?
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.
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.
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.
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
