I want to draw graphics onto a form without using paint or load events.
This Example works untill the graphics get covered and uncovered. Then the graphics vanish.
Public
Sub DrwBrdrBx()
Dim DrwBrdr
[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.
[Code]...
I have a form called frmMain and I created a second instance of the form to display on a second monitor using the code:
Public
frmMain2 as new frmMain
I am trying to prevent flickering when I switch between forms by overriding the OnPaintBackground event and drawing a background image in OnPaint. The OnPaint code works great for frmMain, but any time I use an e.Graphics... command it only applies to frmMain and not frmMain2. I'm thinking I either need to have a separate override for the OnPaint event for frmMain 2 or use e.Graphics.to draw on the second monitor, but I don't know how to do either. I have drawn on the second monitor outside of OnPaint by using:
Dim g as Graphics = CreateGraphics()
Dim g2 as Graphics = frmMain2.CreateGraphics
Then I use g.DrawImage for frmMain and g2.DrawImage for frmMain2. This does not work inside of OnPaint. I tried it and everything gets drawn on the first monitor.
I am trying to put a new face on an old C program. The C program is, of course, unmanaged code, designed smartly to separate the number crunching and the interface, and the interface I'm trying to replace is X windowing. The graphics part is where it gets a little hairy, because the C is going to need to continue to draw in my new interface, based on the data the program produces. Even if I want to duplicate that data in .NET so that the .NET side can handle all of the drawing, the fact remains I'm going to need to operate on the graphics window in some fashion from C.
I gather that handles have a lot to do with the bare Win32 graphic operations. Is such a similar handle provided to, say, a PictureBox element in .NET? And if so, is it the kind of handle I can use in the unmanaged code without an issue?
I have tried and tried and tried to google for the solution for weeks now, and all I come up with are either C++ solutions (using object-oriented GDI+) or some sort of extension to the C language.
Alternatively, is there a way I can have .NET create a handle specifically for this purpose of having C draw it?
To sum it up, I am using Visual Basic .NET 2008 and a C DLL (also compiled in VS2008), so far in the little testing I've done, I've been able to marshal complex structures to and fro, but I am not sure how exactly I'd let C do any drawing on the .NET form, if that was even possible.
So I decided to make my famous tile selector project, but instead of drawing in a form's graphics, do it inside a tabpage.Well, I managed to get it working, but it seems to... flicker.Normally, setting the form's DoubleBuffered property to True would help a lot there, but apparently, the tabpage has no such property.
When I invalidate the tabpage, I draw two images and fill one rectangle.Following past advice, those two images were created before, just once, and are stored in a variable so I don't create them every time I invalidate the tabpage.
I was under the impression that there was not much difference between Sub New() and Form_Load. However, I found one weird bug...Add a combobox and a label to a form, and the following code:
Public Class Form1
Private mstrOutput As String = ""[code].....
The label text shows that the value of ComboBox1.Text changes between Sub New() and Form_Load.Is this meant to happen?
Running VB/Studio? 2010 on XP. I draw on full screen resolution of 1920 wide x 1080 hi.I have set FormBorderStyle to NONE & WindowState to Maximize which seems to be the only way to get rid of the task bar.but w or wout this setting, My graphics draws a full screen twice - mostly repeatably.When I have [code] parameters set to use 9/16th of screen horizontally, the pattern is drawn once the first time I run it and usually once if I hit F5 quickly enough after hitting Alt-F4. But if I wait long enough [a second or 2] after 'Ready' appears at teh lower left of the IDE screen, then it draws the pattern 3 times.for wider patterns, 10/16th, 11/16 up to 16/16, which is 1920 pixels wide, it usually draws the pattern once after I make this parameter change and twice from there on. The 'twice' is repeatable; it 'doing it once' the first time is not a sure thing.
There are more peculiaraities than this, but if we can find causes for what I"ve given you, it might get them all wout making it seem more complicated than it is.I don't think it's in my code; it works - it draws the right thing the right number of times w no compiler errors. But here is the guts of it:
Public Class Form1
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
[code]....
I have a very annoying problem, I am trying to draw an image with the Graphics class but when I do DrawImage, it automatically scales it up! heres some example code
graphics.DrawImage(My.Resources.TestImage, 20, 20)
PictureBox1.Image = My.Resources.TestImage
The picture box image is the correct size whereas the graphics drawn verison is too big!
I need to make a small application in asp.net where user could draw a small drawing and that drawing is saved in the database for later review.
View 2 RepliesI 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 building a 2D game where the user is a circle(:P) and the enemies are rectangles coming at him. However, my problem is that when I placed a very nice picture of space I found on the internet, the screen draws whatever it has to underneath this image. Everything works,I can still see my lives going down when something collides into me - except the fact it is all covered up by this picture. How Do I Draw everything ON Top of this - (I tried using the 'Send To Back' Command)
EDIT: The form draws everything through a timer, and the user controls his character through keys.In the mybase.load procedure:
PicBackGround.Dock = DockStyle.Fill
PicBackGround is the picture box with the image.In the paint procedure:
e.Graphics.Clear(Color.Black)
e.Graphics.FillEllipse(Brushes.Orange, Player)
[code]....
Player is a rectangle declared right at the top, Dim Player As New Rectangle(0, 0, 50, 50); There is then the array Objects, which stores all the data about the enemies coming at the player, Current_Projectiles is simply an array to store data about rectangles(bullets) that the player fires.
I have written the below code in my project.Well i am pasting only the piece of code where i am facing the problem.I have written this code with my lot of struggle, but still not getting the accurate image.[code]
View 14 RepliesThe problem I am having is that when I make a Paint sub (I have another form adjacent to the one that I am struggling with), when I move one form over the form that has the graphics, it repaints it. This gives me a different result each time, since when it is on hard the grid changes. I would like to know how to paint in the load sub, so this will not happen anymore.
[Code]...
I have a problem concerning the Form_Loading event: When I want to load a new Form (ImageDisplay) the ImageDisplay_Load Event is not executed first.
Instead it runs through the global variables definitions and then executes a Private Sub called numericupdown1_changed.
The numericupdown1 field is part of the form I want to load and has not been touched.
That is my calling sequence:
Private Sub Dispalydata_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Dispalydata.Click
Dim myDisplay As New ImageDisplay
[Code]...
The strange thing is that for other forms in my code it works well and starts with the form_load function.
I'm a unviversity student and for an assignment we have to make a simple project where the user specifies a shape and a color, and then the shape is drawn in some kind of space. So like they choose circle, green, and in this blank space on the form a green circle appears, pretty simple. Anyways we have some kind of msdn alliance thing where we can download Visual Studio for academic purposes, so I downloaded Visual Studio 2008. I spent about an hour going through the tool box trying to figure out what could possibly allow me to draw stuff in it, and I'm really not sure what it could be. On some online tutorials it said something about a function on picture boxes like picturebox.Circle(100,100), 100, vbgreen or something similar, and when I tried making a picturebox and writing this code nothing worked. My friend told me to use a 'canvas' but neither of use know how to actually find such a control (its not in the toolbox).[urls]....
View 14 RepliesI've been having some trouble with a draw subroutine in a project I'm working on. The last time I did anything like this in VB, drawing on a form was as simple as calling the Line() function, so I'm not clear on a lot of these things. Here's my code:
Code:
Private Sub drawBox(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles btnDraw.Click
Dim blueBrush As New SolidBrush(Color.Blue)
Dim i, j As Integer
[code]....
The code is just meant to draw a grid of small squares across the form, using the centers() array, which is set up elsewhere. My problem is that I can't figure out how to call this sub. If I use Handles Button.Click or Mouse.Move or something like that, VB returns an error saying that Draw and Mouse functions are incompatible. I can't call it normally, because I don't have values for sender and e.
I am having a problem in Form_Load. When the following code executes the form pops up with out executing any further code: Me.TblAssetsTableAdapter.Fill(Me.ITP400_IP3_ADataSet.tblAssets).
I am trying to use Form_Load to populate values in a ListBox control from an Access database table.It appears the problem was in the Compile settings. It was the 'old' problem of using AnyCPU on an x64 machine. I changed the Compile setting to x86 and the problem disappeared.
I have seen code that uses the event:MyControl_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
and others the used: Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
Is there an advantage to using one over the other?
Is is possible to draw graphics in a console application or is console limited to only text? If possible, where is a guide to the form of the graphics structures.
View 3 Replieshow do I draw over existing graphics drawn on the control. This is what I'm using to draw the objects:
'Private paintRect As Rectangle
Private Sub Panel2_MouseDown(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles Panel2.MouseDown
paintRect.Location = e.Location
End Sub
[code]....
I am really exhausted because I have been trying to find a way to draw 3D sphere which is spinning and have done nothing yet.. I am using visual basic studio. Part of my project is to draw solar system which includes a star and planets rounding about it and their stem. I want to create a class that create a planet with draw function and delete function to create movement.
I have really try to find something in the network but do nothing at all. First, I have read about XNA, but the tutorials seems to be quite complicated - after all, XNA is used for creating games, I need something more simple. I decided to use the directx libraries, read a lot about them but succeed only in draw rectangle (2D).
I am trying to draw a circle on the visual basic console. I have been told that the console is not made for this but i have to use it.
What I want to do is a circle with:
Centre (40,20)
Radius = 10
I know from basic trig that the following will give me the points on the circle:
x= (10 x CosA)+40
y=(10 x SinA) +20
(A) being an angle in radians.
Then combine x & y that will give me a point on the circle.
I want to use the '' Sets the cursor position
Console.SetCursorPosition(x, y)
Console.Write(".") "
To print a point(.) on the given position from the formulas above.
Now heres my question how do I get Visual Basic too calculate:
x= (10 x CosA)+40
y=(10 x SinA) +20
360 times i.e 0rad-2Pirad and then pass the x & y [(x,y)] point to my cursor position code so that a '.' is printed at that position. I.e I will end up with a circle made out of 360 '.'
I would asume that a loop is used and also an array to store the 360 Pi values. I'm finding it extremely hard to even get Vb to calculate the Cos of an angle.
how to draw a dot (with XY position) in the radar.
Code:
' Draw the radar plot.
Private Sub picCanvas_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles picCanvas.Paint
' Generate coordinates for the points.
[code].....
Ok..I think it's very simple but I'm still a begineerI'll try to make it clear I need to draw a rectangle when I click on the button..what is the required code?
Quote:
Public Class Form1
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
[code].....
I am trying to draw an image from a MS Access database by use of e.Graphics.DrawImage(New Bitmap()). In my database Row 0 Item 1 holds the path to the image I want to draw.
My current code looks like this:
Code:
Private Sub pnlStart2_Paint(ByVal sender As Object, ByVal e As_ System.Windows.Forms.PaintEventArgs) Handles pnlStart2.Paint
e.Graphics.DrawImage(New Bitmap(ds.Tables("Track1").Rows(0).Item(1)), 3, 3)
End Sub
When I run my program I get the following message in my code: Illegal characters in path how I can draw the image from the database?
I am using visual studio 2005. I want my form should be editable, when i am pressing some function key. Like, when form load, no field should be editable. When i will press "Ctrl + N" or "Ctrl + F2" Key then only form should be editable. Is this possible?
View 7 RepliesI want to display form1 for 5 seconds on my form_load event, after 5 seconds i want it to close , im not sure how to do it with a timer,
View 2 RepliesI want to draw a text with 32 bit transparency on a graphics object. When I try, I only get black color in the result.
If I try to draw a line with the same semitransparent color, it works perfectly.
I have this code:
lBitmap As New Bitmap(32, 32, PixelFormat.Format32bppArgb)
lGraphic As Graphics = Graphics.FromImage(lBitmap)
lGraphic.SmoothingMode = SmoothingMode.HighQuality
[Code]...
I was thinking it may be that SolidBrush does not support transparency, but I found a predefined brush named Transparent (Brushes.Transparent) that was a SolidBrush when I looked at it in debug. I tried to use Brushes.Transparent as the brush when drawing the text, and it was successfully not showing at all. That means I get full transparency to work, but not partial transparency.
I have an application that makes a drawing with measurements both horisontal and vertical. I like to get the vertical measurements to be in direction down-up, not up-down direction as StringFormatFlags.DirectionVertical does. All the measuretexts are drawn to a graphics path. Because that path includes all measures at different locations I canīt TransformRotate that path, the text should be rotated before it is passed to the graphics path, or ? It would be so nice if it would be a StringFormatFlags.DirectionVerticalUp to handle it.
View 7 Repliescrashed a while ago and i didn't bother fixing it since my new laptop was due to come shortly after, because of this i am a bit out of practise with Visual Basic .NET. My problem is that my application allows a user to draw a rectangle with their mouse on a picturebox called picimage. When the user is done drawing their rectangle and tries to draw another one the previous rectangle gets deleted. I was playing around a bit with the
vb.net
Public Class Form1
Dim DrawRectangle As Boolean = False
[code].....