I am using this code for syntax highlighting in RTB and it works pretty nicely except for the flickering part.
VB.Net
Private Sub txt_source_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txt_source.TextChanged
Dim words As New List(Of String)
words.Add("<p>")
words.Add("</p>")
[Code]...
How would I prevent Rich Text Box from flickering?
I know that in primitive versions of vb (as found in excel) there was a line that you could insert t prevent screens from flickering to and fro when it is trying to process something.Application.screenupdating = false
View 4 RepliesMy Application having MDI Form & many MDI Child form.When I open MDI child forms one by one from MenuStrip , I saw Flickering effect of fom?
Imports System
Imports System.Text
Imports System.Data.SQLite
Public Class frmMain
[code].....
I have read everything I can find, and understand some of it. I don't know what I am missing though. I can't get the flickering to stop. Can anyone help me? I've been using VB 2008 for months now, but I am new to the graphics bit. At first I tried using an ellipse from the powerpack, but that flickered even worse.
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I am working with GDI+ to draw backgrounds for my forms. I have a main form with 4 tabs, which all flicker. There is a gradient background behind them (bitmap drawn in GDI+ at Form_Load). I have double buffering enabled in the following manner:
Me.SetStyle(ControlStyles.UserPaint Or ControlStyles.AllPaintingInWmPaint Or ControlStyles.OptimizedDoubleBuffer Or ControlStyles.ResizeRedraw, True)
Everything on the form rarely flickers. The only times are when I am resizing, the numerous docked controls on my piece-o-junk netbook flicker momentarily, which is hardly noticeable. On a normal laptop it runs quite smoothly.The problem of which I speak is right on the headers of each tab (the white rectangle with text on it). When I move my cursor on or off of it, it will flicker. What is actually happening is that it is momentarily disappearing then re-appearing. This seems to be a control paint bug.I've tried the following override, without success.
Protected Overrides ReadOnly Property CreateParams() As System.Windows.Forms.CreateParams
Get
Dim cp As CreateParams = MyBase.CreateParams
[code]....
I have a combo box on a form, it has a large number of values in it (about 40000). When the combo box populates it flickers from invisible to visible for about a second.After investigating this I am sure that it is not the call to the database that is causing this but when the combo is drawn.
View 6 RepliesI am designing a Win Form in VB.NET and Using Table layout in it. Problem i facing is, My WimForm is flickering every time it is load.
Kindly suggest me permanent solution in VB.NET . Why this problem occurs ? Is it because of Table Layout ?
I have a form where i put controls at runtime. Everything works fine and fast. I also set the doublebuffer property of the controls to true and then there is no flickering at all. But then i proceed to add an image in the background (also during runtime), but then each item i move is flickering even if i remove all the controls and only leave the background image when i move another form it flickers anyway.I put an example below of how im adding the image.
Public originalImage As Image = Nothing
Private Sub Panel2_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Panel2.Paint
If originalImage IsNot Nothing Then
[code]....
For some reason while using syntax highlighting, my RichTextBox flickers alot.
Public Shared Sub SHSet()
Dim words As New List(Of String)
If ScriptEditor.RichTextBox1.Text.Length > 0 Then
Dim selectStart As Integer = ScriptEditor.RichTextBox1.SelectionStart
ScriptEditor.RichTextBox1.Select(0, ScriptEditor.RichTextBox1.Text.Length)
ScriptEditor.RichTextBox1.SelectionColor = Color.White
[Code]...
Dim Buddymarks As New WebBrowser
View 3 RepliesThere are multiple examples of modified TabControls on the Internet which allow the user to reorder the tabs using drag and drop. However, all seem to use the following technique:
Determine which tab is being dragged
Determine the index to which the tab is being dragged
Empty the tab page collection and add in the new order
The last step, hoewever, causes the control to flicker alot. Besides this, when there are a lot of tab pages on the tab control, it is rather slow.
Is it possible to swap items (i.e. swap indexes) in a TabPageCollection, without the TabControl flickering?
im getting flickers almost everywhere in my app.
1. Enlarging form
2. changing label text
3. reloading multiple images
how to correct this. Look terrible
Ive attached a pic of how the labels are missing during the flickering, couldnt get an image of the white flickering
I use Visual Basic 2008, I've got a flickering problem when using Timer and call Graphics.clear routine. I have read many advices to avoid this Flickering problem and try to use them but I still can't fix this problem of flickering.
Here is all of my simple code :
Public Class Form1
Dim r As New Random
Dim b, c As Integer
[code]....
I am having a similar issue with the double buffered set to true for a picturebox. I customized a picturebox control in vb.net where, a panel contains the picturebox.
Upon a mousedoubleclick of the picturebox, i scale the picturebox width wise a certain scalefactor, so that the picturebox is greater than the size of the panel. I am doing this for horizontal zooming and panning. With that said, the picturebox could become large in size.
At certain screensizes, after scaling the picturebox 6 times the size of panel, at fullscreen, i receive an error messsage implying "Not enough memory available to process the command."
However, when i turn off double buffered, i dont get the error, but i get much unwanted flickering.
Here is my code in the Paint Event:
Private Sub picPMGraph_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles picPMGraph.Paint
Dim i As Integer
[Code].....
Does anyone know what causes and more importantly how to prevent the flickering you come by when painting a control?
View 3 RepliesI'm having problems with flickering well using transparent TableLayoutPanels. I have a label that I'm using as a count down, it's anchored to all 4 sides inside a TLP and when the numbers inside the label box change it causes a white flicker inside the TLP.I'm also getting a lot of flickering when the programs first opens.url...
View 7 Repliesi have developed a windows application whose interface has multiple picture boxes panels with background images for rich look and also a usercontrol which contains a gridview and WPF scrollbar in an element host. All these controls are placed in one panel (this is also having a background image) which is equal to the size of windows form. The reason for placing all these controls in the panel is that the window can be resized, if needed, allowing scrollbars.
Due to these large number of controls in which some of them have transparent backgrounds loaded in a large panel having background image, the window is flickering when moved or any other application's window is moved over it.
i am making an RPG game with visual basic...The character is a picture box.The problem is when i move the charactor with the arrow keys it flashes black for a milisecond. I think added animated walking where it slowely moves 32 pixels but not it goes black the whole time... what can i do sto stop it going black everytime it moves?
Old movement
If e.KeyCode = Keys.Right Then
player.Image = My.Resources.mainplayerright
moveto = New Point(playerx + 32, playery)
[code]....
That code moves the player slowely but causes a big black line to merge then just ends up teleporting the player..How can i get rid of the black flash during movement?
The TreeView control in my application was working fine until i added *small* icons, now whenever i try to open a node the selected node and the one above flickers...
View 2 RepliesI have a form that is the main form.I don't want it to show when it loads, but when I do Me.Hide() in the Form_Load event, it flickers visible before it hides. Because before I made this form the main form, the one I was using previously didn't flicker.
View 15 RepliesI have an image that stretches to the size of my form so if the user resizes the form, the image resizes aswell. All works great apart from the constant flickering during the resize of the image.
View 4 RepliesI have quite an annoying problem and I don't know how to fix it. See I have several panels in one of my forms, all with background images. On the start of the application, the form slides down, and when the form reaches a set value, all my panels slide out.The problem is, when the panels are sliding, they flicker furiously! It's really annoying and I'm not sure how to fix the problem. When the panel reaches it's set value and stops moving, the flickering stops. I can only assume it's because of the background image
View 4 RepliesI have a listview (details) with owner draw set to true (so i could make rows alternate in color, looks cooler) which basically contains items and subitems whose texts reflect status info that updates constantly
the problem is, sometimes (if the task runs quickly) the status changes really quickly, and as a result, listview items "flicker" for a millisecond no error, no real problem, its just really annoying and makes the program look less professional.
Is there a way to make the listview not flicker? Or maybe there is a way to make it so that the listview doesn't process too many drawsubitem calls during the same time interval? or maybe there is some customized list view out there that does the trick better?
NOTE: i tried with owner draw set to false. it flickers less, but still flickers. same problem :S
Also NOTE: i am not making cross-thread calls. i have 50 items in the listview and 4 colums, mainly the last 2 subitems change.
Right now I'm drawing a small 16x16 image on the title bar of my window. It works nicely, except for an obnoxious flicker that I cant figure out how to get rid of. I'm simply drawing the image like this:
Protected Overrides Sub WndProc(ByRef m As Message)
If m.Msg = WM_SIZE Then
wnd_size = New Size(New Point(CInt(m.LParam)))[code]....
Its repainting the entire title bar each time something is changed on it(click, mouseover the corner buttons, etc), and its during the repaint I get the flicker.
I am using MDI form and nearly more than 10 child forms.. Here, When i load or unload some forms, it flickers very much.. It is not as much good.. So i need to avoid this.. How to avoid form flickering?
View 3 RepliesI'm writing a simple paint program in VB 2008 that allows the user to create rectangles using MouseDown event to anchor one corner, MouseMove to stretch (or grow) the rectangle, then MouseUp event to complete the rectangle.The last statement in the MouseDown event is Me.Invalidate() to trigger the form's paint event where all the rectangles are drawn (refreshed).
View 1 RepliesJust finishing off an update to an application written in VB.NET that used to run fine under CE.NET 4.2. Deployment platform is now Windows Mobile 6.1. The application runs in full screen, however whenever a new form is opened, the task bar, i.e. the bar with the start button comes to the fore and then the new form takes over. This is particularly annoying as I have a form that has many sub forms which are 128,128 and still the task bar flashes and obscures part of the user input screen
View 2 RepliesI have 2 questions:
1) Whenever i change the text in my richtextbox it flickers, as part of my program a richtextbox is changed every 1-2seconds and the flickering can get extreemly annoying, anyone know a way to stop this?
2) Im looking for a function that when passed a line will run through a textfile and remove said name for example in a textfile that contains
One
Two
Three
Four
you could pass removeline("Two")
and it would resave the textfile as
One
Three
Four
When I enter a vb.net textbox, if there is data in it, I want it to be highlighted. I looked around and couldn't find a property that would do this so I do the following:I built a little subroutine that does the highlighting and then call it from the ENTER and CLICK event on each text box.
[Code]...
I have my tabcontrol class inherited as a custom tab control and painted my custom tabs, what i would like to do is when i put my mouse over a tab that is not currently selected the tab changes colour, gets highlighted.
View 7 Replies