[2008] MDI Paint Flicker (Imp)?
Feb 5, 2009
Whenever I load or close child forms or other form (for that matter) then there is flickering in my MDI form. The flickering maybe because the form may be getting painted with gradient or so. Now this flickering is really noticable and I need to solve this. I am pasting the code that I am using to paint my MDI form. If you guys think the code is in efficient then let me know. Or if there is any fix or other way to go about it then I would like to know.
CODE - written inside my MDI form.
Public Class MdiContainer
Inherits Control
Private WithEvents MdiPane As Control
[code]....
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Mar 26, 2006
I am sure that I have read how to do this but I seem to recall that it is to do with the paint event of a control.
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May 23, 2010
I have a character that I made in graphics and when an enemy attacks the character, I want it to flicker, how would I do this?
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Apr 3, 2012
I am developing a window based application in VS2008, it has 3 forms.on each forms i have used TableLayout panel and set the Dock property to FILL.due to this, on page load my screen get's flicker and resize event get's called.i have tried with "Doublebuffered" property but failed if i remove doc property (means set it to none) then it's working fine but on only spcific screen resolution my screen works, on higher resolution it get's cut.
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Sep 20, 2009
How to create a Paint program with all the functions of Microsoft Paint?
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Feb 9, 2011
How can microsoft paint(or any other painting software) be included in a VB.net project? I need to used its functionalities to maipulate jpg and movie file. Is there any ways this can be done on VB.net (or Visual Studio).
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Jul 24, 2010
how to create a software for paint mostly used in windows XP
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Jan 20, 2010
paint events in my dgv, i have a dgv, that will be multi color and with some icons to indicate the state of the data. For example, i load all the data to my dgv, add a new image column to the dgv that will have three different icons, then the rows can have one of three colors. The values to set the colors and icons are in two columns of the data source table. And i have another var that indicates if the rows headers have numbers or not, just to help the user...
VB.NET
Private Sub frmGPConfirmar_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
fillDGV()
prepareDGV()
[code]....
So what i need it's how i can do this, paint the numbers in the rows Headers, put the images in the column, and change the back color of some rows?In other forms where i don't have this three conditions i can do what i want, but in this one i can't... or i can but i doesn't work very well...
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Aug 26, 2009
From jmchillihiney's most excellent code bank sumission on Drawing:Quote:The way GDI+ works, controls get repainted on screen over and over again, sometimes many times in quick succession. On each of these occasions the control's Paint event is raised. You need to use the Paint event of the control to perform your own drawing or else, the next time the control is repainted, your drawing will just disappear as the control paints over it.
When you're creating a custom control you should override the OnPaint method and perform your drawing there. When you're designing a form or user control and you want to add custom drawing to a child control you handle that control's Paint event, then perform your drawing in the event handler.
You may have seen, or heard people talk about, controls flickering on screen. That's caused by repainting large areas of the control repeatedly and happens because painting on screen is actually quite a slow process. As such, you should try to do as little of it as possible.So, I am attempting to draw part of a custom control. I have placed a SplitContainer on a UserControl, and oriented it vertically. I then shrunk to top panel to 15 pixels in height. I have two Methods which each draw a different type of Path + fill into the panel, and then draw a border around it (One is a gradient fill, and the other is just a plain color). The idea is that when the user clicks on this panel, it switches from one to the other (a "Selected State" and "Not-Selected" state).
I have also created an icon which looks like the +/- widget on a treeview (or more specifically, on the vs2008 Toolbox, which is essentially what I am trying to emulate here . . .) which toggles as the control is selected/unselected. Not that ultimately, the selected state will change when the user selects OTHER controls, but the Expand/Collapse gizmo will toggle when the user clicks on the panel in question.
Again, check out the vs2008 toolbox. The Group "headers" are what I am after here. Believe it or not, all of this now WORKS (gee me, look what I did!) EXCEPT the initialization. If I "Handle" the paint event of the SplitCOntainer.Panel1 object in any way which prevents the flickering jmc alludes to above, any redrawing required by either initialization OR hiding/unhiding of the host form is prevented. And it seems like the SplitContainer panel is constantly redraing (probably checking to see if the splitter has been moved).
I can post some code, but it is a little confusing, since I am dealing with some semi-complex interaction here. Also, It is not necssecarily structured well ()yet). AFTER I figured out the drawing bits, THEN I was going to try to do some refactoring and restructuring. Code Follows in next post.
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Mar 27, 2010
I've looked everywhere, but I havn't found anything on how to paint on a webbrowser control. I tried to do it with a transparant panel over it, but that didn't work.
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Nov 18, 2009
I've got a picturebox where someone can draw what they like on it and I have added a colordialog so the person can change the colour of the pen.[code]The trouble is, when I change the colour, the stuff ive already drawn on the picturebox changes colour too but I want it so that it only changes the colour of the pen and not what has already been drawn
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Jun 22, 2009
Create a paint application in VB Express 2008?
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Oct 13, 2010
I've created a schedule panel,drawing some lines,and adding some labels,as in image(blue,red and green are labels added by code).Now I've put some code to show the number for each cells,for that I've used Paint event of the panel but this slow the paint event,and after some investigation I found that the paint event was raised for some 20 time on my first form shown.Is there a place to put this code to run only once ?
[code]...
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Aug 14, 2009
How can I make it so when I click a command button It will open up Microsoft Windows XP Paint??
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Jul 4, 2009
With reference to my previous thread on Paint event handler.. [URL] I went to read up more on Paint Event Handler.. I have a button which draw out a path based on the user selection.. Below contains the drawing of the path portion of the button click event code
[Code]...
However It did not activate the paint event when I clicked on the button.. Instead, the paint event still activate even before I click on the button? So can anyone teach me on how to activate the paint event when I click on a button?
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Mar 8, 2011
I have just run into an issue of screen flicker that I haven't been able to solve. I have a panel with dozens of controls on it. Painted onto the panel, behind the controls, are a few colored rectangles.
Those rectangles flicker whenever the mouse is moved over any control, or off the panel. Basically, a paint event for the panel is raised whenever the mouse leaves the panel.
Therefore, I thought that if I only painted the rectangles when they needed to be painted, not every time the Paint event was raised, that I would be able to avoid the flicker. After all, there is no obvious reason why they would need to be re-painted just because the mouse moved over a control on the panel.
the paint event was still being raised, and the panel just wasn't painting the rectangles, so they weren't being drawn at all (but they sure didn't flicker). So, the flicker is being caused by the fact that the paint event clears the panel, which gets displayed in a cleared state for a fraction of a second, then the rectangles are drawn in.
Doublebuffering the form has no discernible impact, which may well be because the screen draws the absence of the rectangles on one frame, then draws the presence of the rectangles on the next frame. They both get shown in sequence, so the rectangles appear to flicker badly.
One obvious alternative is to not even draw the rectangles, which works great, and they are only useful visual guides, not essential components. Still, that doesn't seem like a good solution.
So what I am looking for is a way to supress the display of the undrawn image before showing the finished image.
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May 1, 2009
My application is runs without any external dependencies like .dlls. When I run my app, the controls flicker on as it loads. It's not terrible, but it's annoying and kind of takes down from the professionalism. I was trying to figure out what was causing it and found out that it was my background image. My background image is a jpeg and I guess it is too large. Is there a way I can get it to load the image better so my controls don't flicker or maybe use a different file type that is smaller?
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Feb 25, 2011
How can we repaint our controls at run-time without flicker (hiding them first and showing them afterwards)?
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May 20, 2009
I'm using VS2005. On my old Win XP AMD computer, I developed a stock price chart in VB.net which I could scroll left/right with Hscrollbar. However my old PC failed due to faulty AMD motherboard. Now I'm using an Intel PC with Win XP and same VS2005. My VB.net solution has compiled and runs as it did before - with this difference. Sometimes my scrollbar flashes and sometimes it doesn't. Another thread mentioned "too many controls causing flicker" - but my Form does not have many controls on it. I can't find a property that mentions "flashing" when I search the scrollbar class members.
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Jun 3, 2011
I have a 18kb 1024 x768 jpeg image that is set as background image of my form. The problem is the form now lags like crazy. How can I eliminate the lag?
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May 23, 2012
I am making an application using VB.NET 2010 and I have set a background image which flickers every time I open any new Form or hit tab for jumping from textbox to textbox By pressing (tab) it only flickers once but always flicker when ever I close the form and open again. I have tried everything; background image set to, STRETCHED, CENTRE, ZOOM but still it's the same.
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May 4, 2009
How do I reduce flicker in a vb2005 panel?Inside the parent panel I have 2 other panels that I'm am using.
The outer most panel contains a background sprite and the two innermost panels are overlays that change to fit the places in the background sprite.When I change the overlay sprites I would like to reduce the flicker and make it a smooth transition from one sprite to the next.
Here is the code that changes the images in the overlay panels the overlay panel is not changed if the new value is the same as the old value
[Code]...
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Sep 8, 2010
I've got a panel in windows forms (Visual Studio 2008) which has a background image (A book shelf).When scrolling the image flickers and does not redraw so looks awfully - I've tried creating a new object to use double buffering but this has no effect,
[Code]...
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Jun 1, 2005
I'm using a listview control as a log window for a self-made FTP client application.Sometimes I need to add a row at slow speeds, but also sometimes a lot of information (50-100 rows, like dirlistings, login messages of FTP servers) has to be added to the listview within a For/Next loop.Now adding rows very quickly makes the listview flicker in an ennoying way. So much, the listview is hardly to read.For me, it is important I can see every row added (using different colors to know different meanings).Searching the internet, I find solutions using BeginUpdate & Endupdate of the listview control just outside the bounds of the For/Next loop. This makes that the new rows are displayed only when the For/Next loop is complete.Does anyone know a solution to significant reduce the flickering (maybe without using BeginUpdate & EndUpdate?), but where I still can see every single row added?
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Nov 28, 2009
The title says it all. I'm looking for a way to stop flickering in my animations using the .net GDI + for making a 2d game. I've found lot's of bad tutorials online about double buffering and refresh but none of them work.
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Nov 10, 2010
When I add or modify controls on the form the graphics are redrawn many times over.The more graphics that are drawn the slower the machine gets.
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Feb 5, 2009
I am using a MDI form and child forms. Now I don't like the standard back colour of mdi form so I got code on the net which paints a gradient colour to the mdi. So far it is working okay.Now the problem is when I load a child form or close it or do a similar activity then it causes flicker in the mdi background. This gets pretty annoying at times and you see the background flicker.
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Jan 11, 2012
I was wondering if it someone could help me solve this problem. I have a full screen application with a panel in the center which is used to display different user controls and screens when the user uses the app.However, I have a rather large gradient image set as my form's background and it causes the panel to flicker every time controls are added. I find that when the background image is removed the flicker goes away. How can I keep the background image but eliminate the flicker? My form is already double buffered.
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Dec 1, 2008
I'm having trouble with a football program that I'm writing. I'm finding that there is a lot of flicker coming from the program having to redrawn 36 (Australian football) small circles with numbers in them about 10 times per second (or even more) as the players move.I'm just using basic e.graphics. fillellipse.code in the Paint section of the form. I then use me.invalidate on the timer's tick routine.I haven't touched this graphical stuff for a while and I vaguely remember there being some ways to help this. There are also things like the ground which I'd like to not have redrawn because they don't have to as they don't move. I remember that you can do this but I don't remember how.
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Mar 8, 2009
I have a ListView control contains about 700 items and 6 columns, the ListView is flicker badly when resizing any column.Is there is any property belong to the ListView or its container can reduce this flicker?
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