VS 2008 Drawing X Number Of Bitmaps?
Jan 13, 2010how to draw an unknown amount of images to a form
the amount of images should be determined during runtime.
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Avoiding Flicker When Drawing Multiple Bitmaps With Graphics.DrawImage
Mar 15, 2011I need to draw a bitmap background with one or more moving bitmaps in the foreground; something like a chessboard where pieces move across it. I use a timer-tick event to redraw the background and then draw the relocated foreground image like the code below. But I get flicker, even though I set the form to use double-buffering. The culprit seems to be redrawing the background to refresh where the foreground images used to be; no flicker if I replace the background DrawImage with a simple Graphics.Clear. I think what I want to do is draw the background, and the foreground bitmap(s), in memory and then render it all. I used to do this with double-buffering, BitBlt, and .Refresh in VB6 but I haven't found the equivalent in VB2010. This must be a pretty common graphics requirement; what's the trick to it?
Dim Gfx As Graphics
Me.SetStyle(ControlStyles.AllPaintingInWmPaint Or ControlStyles.UserPaint Or ControlStyles.OptimizedDoubleBuffer, True)
Dim rectBrd As Rectangle 'use as clipping region for drawing
[Code].....
VS 2008 - How To Populate ListView With Bitmaps
Jun 15, 2009I need to know how to populate a listview with all of the images from my.settings, and I need it to show the image in the listview. How would I do this? I've never used listview because I never cared to learn until now.
View 2 RepliesVS 2008 : Draw Multiple Bitmaps Onto Image?
Dec 26, 2009I want to know if there's a faster way to draw images onto a picturebox based on a list of point.
vb
Dim MyPoints as New List(Of Point)
Dim MyBitmap as New Bitmap("C:MyBitmap.PNG")
[code]....
Now, This code may be a little sloppy, but I just put it together. The image isn't very simple, but it's simple enough. After about 10 images that need to be drawn, it starts to get slow.What would I need to do to ensure it draws the images faster? If I made the image itself smaller would it make it go faster?
VS 2008 Store Loads Of Picutres In Different Bitmaps
Oct 24, 2011Basically, I have a program which screenshots the form when the person clicks their mouse button. Afetr the click it will store the screenie in a bitmap.But the problem how would I store loads of picutres in different bitmaps if they for instance clicked 100 times without having to declare the bitmaps 100 times and seeing if each has a image and then checking thge next 1.
View 1 RepliesVS 2010 Drawing A Line From A Number?
Jan 18, 2012I have been working on an angle calculating program. I have incorprated a feature so you can type the angle and the program draw it. I have since added a few new features and updated everything as such. For the life of me I can't figure out why the draw angle has stoped working. let me just paste some code.
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
[Code]....
Right, the program isn't so complicated. The important bit is that you type an angle in textbox1 and hit enter. Then what happens is the angle is calculated against a base line (one of the new features is that this base line can be moved from left to right and center.) the problem occurs when you hit enter, the program doesnt actually draw the line for you.
C# - How Many Bitmaps Can Create In .NET
Jul 9, 2010.NET Bitmap class uses GDI+
I want to know how many Bitmaps I can create.
Will memory leak when create too many Bitmaps?
Binding Multiple Bitmaps?
Apr 24, 2010I'm currently working on a project where I need to bind 3 different bitmaps.Bitmap1, Bitmap2, Bitmap3.
I tried :
bitmaps = Bitmap1 & Bitmap2 & Bitmap3
But of course, that didn't work.If it's possible, I also need Bitmap1 and Bitmap3 to have a fixed size and Bitmap2 to change its width if the form is resized.
Create Bitmaps From Filestreams?
May 22, 2009I'm trying to create a new bitmap from a filestream...I keep getting the error "parameter not valid" on the line[code]...
View 6 RepliesBitmaps: Zooming To Pixel Level?
Jan 9, 2012I'm experimenting with the various graphics, bitmap and image functions of vb.net 2010, with the aim of being able to create an image processing tutorial program for my Physics AS group. Currently, I'm trying to zoom in to an image so that individual pixels are clearly visible. The below code shows what I'm doing.
My problem is that the zoomed in image always comes out blurred; the individual square pixels are not visible. I presume this is because as the DrawImage method resizes the image, it re-samples the image in some way. Is there a way of resizing the image while retaining the pixels as in the original image, so that individual pixels are visible? I've tried several other methods, including drawing to a picturebox control and then resizing the picturebox with the size mode set to zoom or stretch... this results in the same blurred image.
[Code]...
C# - Should A Function That Periodically Returns Bitmaps Re-use Them?
Jul 21, 2010I have a function that returns a bitmap meant to be used as background in a panel, and occasionally I'd have to call it to create a new background based on parameters
View 2 RepliesExtract 2 Bitmaps From Winload.exe.mui File?
Jun 19, 2010i want a way in which i can extract 2 bitmaps from winload.exe.mui file in vb.net 2008
View 6 RepliesVS 2005 Convert A Series Of Bitmaps To An AVI?
Jan 18, 2010How can I convert a series of bitmap files to an AVI (or any other format of video)? Or any format of image file? Or any Bitmap object?
View 7 RepliesDrawing Pixels With Me.creategraphics In System.drawing (yay)?
Jun 3, 2012draw 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 RepliesBitmaps And Pictureboxes, Memory Usage Off The Chart?
Apr 28, 2009Bitmaps and Pictureboxes, memory usage off the chart!???????????
View 7 RepliesCreate A Multipage Tiff From A Series Of Bitmaps?
Jan 23, 2009I am trying to create a multipage tiff from a series of bitmaps. The bitmaps are not saved I am creating them using graphics. The code goes something like this:
Dim info As ImageCodecInfo = Nothing
Dim ice As ImageCodecInfo
For Each ice In ImageCodecInfo.GetImageEncoders()
[code]....
The problem is I can see the first page, but no others. I have searched the forums, internet, etc., have worked on this for hours and am getting nowhere.
Find The Colors Of Pixels Using GetPixel(x,y) With Bitmaps?
Oct 12, 2010I'm trying to find the colors of pixels using GetPixel(x,y) with bitmaps.
I understand how to use it and it works.
When I use .ToString I get the string version of the color.
Now when I use .ToArgb I get a negative number and the colors are backwards?
16777215 should be white and 0 should be black.
This is an example of some results:
-16273900 is showing close to black and -32567 is showing close to white.
VS 2005 Image Processing, Combine Bitmaps?
Apr 14, 2009I've searched these forums, and found some GDI and C# links, but I really want to do some image processing in VB.NET.
how I would go about combining 2 bitmaps into one, sort of superimposed on top of eachother? I don't know what libraries are available in .NET.
PictureBox Control Not Display Bitmaps Specified Via Image Property
Mar 30, 2010I am writing a VB 2008 Express Edition application which has multiple forms. All of the forms contain one or more PictureBox controls. All PictureBox controls have assigned bitmaps via Image property during development mode. So far, all the bitmaps displayed during runtime without a slightest problem. Now, suddenly, not a single new one (i.e. which I add from this moment on) would display bitmap during runtime. All the old ones (i.e. those which I have added up to that unspecified point in time when something went wrong) still display bitmaps fine as they did before. But any newly added PictureBox (or, come to that, any other control which can display bitmap.
I have tried also Label control) displays the bitmap loaded via Image property only during development mode. During runtime the PictureBox shows as empty. I tried to load the bitmap during runtime via command Image.FromFile and that works fine (but I don't want to use this approach in my program). If I create a completely new application, all PictureBox controls display the bitmaps just fine. I don't get any errors or warnings in VB editor. I reinstalled the whole VB 2008 Express Edition including SP1 and .NET 3.5 SP1 with no difference whatsoever (as would be expected as any new application works with PictureBox controls fine).
Interface And Graphics :: Find Good Information On Working With Bitmaps
Aug 28, 2010It seems difficult to find good information on working with bitmaps. Specifically I am looking for .NET info on getting tile graphics to the screen. What I know so far is this. I need a picturebox for the display. I need a second picture box for a back buffer and then I need a third picturebox for the tiles that I would copy to the back buffer which then gets flipped to the screen.I need this to be done with .net controls and classes or functions and etc. If anyone has good information on this, please let me know. I am using visual basic 2008 express edition.
View 2 RepliesVS 2008 Drawing 'arc'?
Aug 19, 2009I have a little experience with drawing using GDI+ in VB.NET, but not so much with more complex shapes. All I ever used were lines and rectangles, and the occasional ellipse.I need to draw an 'arc' like this:I can specify the starting angle (0 in the picture), ending angle (angle from the horizontal (left side)), and the starting and ending radius, and I'm sure any other things I need can be calculated from that.The problem is that I have no clue which drawing function to use. Can I do it using FillPath, or FillClosedCurve, or? Of course, I could create a pie shape and then draw a second pie shape (slightly less radius) on top of that to make it appear like it's a single shape, but what if it needs to be 'transparent'? I don't want it to draw a solid shape on top.
View 17 RepliesDrawing On Picturebox Vs Drawing On Form?
Feb 18, 2012I 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]....
VB 2008 Move A Drawing?
Apr 24, 2012I have made a program in which a small space ship rotates, with some tutorials I found, then when i tried to move it I realized that .location does not work for bitmaps..
View 1 RepliesVS 2008 CustomGroupBox Drawing?
Sep 2, 2010I have a Custom Groupbox that overrides the OnPaint event to do some custom drawingbackgrounds, etc. The problem I have is that when I use it in an application and want to draw text on the control, it gets drawn first, then immediately afterwards the OnPaint from the control gets called and draws on top of the text. Is there any way to get the text drawn after the control's OnPaint?
View 1 RepliesVS 2008 Dragging A Drawing?
Sep 12, 2009Dim fnt As New Font("Verdana", 16)
Protected Overrides Sub OnPaint(ByVal pe As PaintEventArgs)
Dim g As Graphics = pe.Graphics
[code].....
VS 2008 Drawing A Grid?
Apr 23, 2009I am having a bit of trouble drawing a grid with GDI+ and VB.net 2008. The grid is designed as one point perspective. The horizontal lines are not correctly positioned, and the form is taking a long time to draw. Could anyone suggest a faster, and mainly more accurite method?
Here is my code currently:
Public Class Form1
Const VanishPoint = -200
Dim g As Graphics = Graphics.FromImage(New Bitmap(Me.Width, Me.Height))
[Code]...
VS 2008 Drawing On A Image?
Oct 16, 2009I want to draw a line on a image, easy enough in principal the image is a map and the lines is between city pairs?
View 12 RepliesVS 2008 Drawing On A Picture Box?
Feb 2, 2011I have my application to where you can load up an image and draw on it with the mouse left down and drag.Only problem is, if the form becomes the inactive one or is minimized/maximized the drawings go away until I scroll the image in the form (I put the redraw functionality in the picturebox.Paint event).How can I make the lines I draw stay permanently? I've put picturebox1.refresh in the minimizedchanged/maximizechanged and form.activated events and still nothing..Even tried the picturebox's resize event and nothing?
View 18 RepliesVS 2008 Drawing On Progress Bar?
Dec 21, 2010I'm trying to draw text on the progressbar. This code below works, but when the progress bar re-paints itself the text disappears.
ProgressBar1.CreateGraphics().DrawString(Vaule & "%", New Font("Arial", CSng(8.25), FontStyle.Regular), Brushes.Black, New PointF(ProgressBar1.Width / 2 - 10, ProgressBar1.Height / 2 - 7))
jmcilhinney suggested i look into the PaintEventHandler.
I read the MSDN documents, but they used PictureBox(). I made this code below, but no luck.
[code]....
VS 2008 Graph Drawing
Sep 30, 2009my assignment is to draw a graph within my VB form with a some variables I have. I was told by my boss that I should use Microsoft Chart Control 6.0, but I don't think it matters if it is in another software.I currently have a few variables, each with a lot of values, "Frequency", which is user entered from maximum to minimum, CH (channel) 1-4 which are given by a machine output I use at my company. My graph, is supposed to have the Frequency values in the X-Axis (horizontal) and the CH 1-4 values within a range of each other in the Y-Axis. Can anybody help? My code for extracting the data and getting the frequency is below. How I got most of it is thanks to Stanav, the thread is over here: url...It comes with 3 buttons (I have not put in the code for button 3), the 3rd button will be used for plotting the graph when clicked.
View 3 Replies