Simple Moving Of A Picturebox Without Flickering
Here is what i want:
i have a form and a picturebox when the users holds down the mouse on the picturebox the picturebox must move allong with the mouse without flickering, so this is what i have:
Code:
Dim OrX As Single 'original x
Dim OrY As Single 'original y
Dim MsD As Boolean 'check wether mousebutton is pressed
Private Sub Picture1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
MsD = True
OrX = X
OrY = Y
End Sub
Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
If MsD = True Then
Picture1.Left = Picture1.Left + (X - OrX)
Picture1.Top = Picture1.Top + (Y - OrY)
OrX = X
OrY = Y
Refresh
End If
End Sub
Private Sub Picture1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
MsD = False
End Sub
i can move it now (well a little bit anyway) but it flickers like hell,
PS: picture1.move flickers just as much
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How Do I Stop Flickering In Moving Graphics?
I haven't dealt with graphics in vb before, but I know of a common graphics method to reduce/eliminate flicker in animations called double-buffering.
The flicker is caused from clearing the old frame before drawing the new one. To counter this problem you actually would have 2 picture boxes (or whatever you're using) the first one is the visible one that will display the animation. On the second buffer, you do the calculations for the next frame and place all the objects there, then once the frame is ready for display you change the image on the visible buffer to that of the second buffer.
Since I haven't done this in vb before I'm not to helpful in the code department, but hopefully you'll find this method usefull.
PictureBox Flickering!
flickering happens whenever a picturebox is cleared and it's contents redrawn. I am facing it with the application I've attached, just click the 'Graph' button and try to modify the scale!
it is really annoying, does anybody know how to fix it?
Picturebox Flickering
Hi,
Is there anyway of stopping the text from flickering in the attached program? I need extra smooth text whatever the speed it is travelling.
Regards.
PictureBox Flickering Problem!
Hi all,
i using picturebox to marquee a text, so the text will continuously scrolling form bottom to top...my PROBLEM is how to put off the flickering?? that flickering getting worse after i fill in a lot of text..
Code:
Private Sub Timer1_Timer()
Const MyStr = "Hello, this is a test string"
Static TopText As Integer
Static TopLoaded As Boolean
Dim Speed As Integer
Dim NotShowing As Long
Speed = Screen.TwipsPerPixelY
If Not TopLoaded Then
TopText = Picture1.ScaleHeight
TopLoaded = True
End If
Picture1.Cls
Picture1.CurrentY = TopText
Picture1.CurrentX = (Picture1.ScaleWidth 2) - (Picture1.TextWidth(MyStr) 2)
Picture1.Print MyStr
NotShowing = (TopText + Picture1.TextHeight(MyStr))
If NotShowing < 0 Then
TopText = Picture1.ScaleHeight
Else
TopText = TopText - Speed
End If
End Sub
Flickering Label And PictureBox
I am writing an application that gets GPS information once a second and displays the current speed in a label's caption, and the current speed limit as a .bmp in a picturebox. When I run the program, the speed label sometimes flickers as though the PPC doesn't have the time to repaint it correctly. The same behaviour occurs in the pictureBox when I blink the sign using alternatively visible=true and visible=false.
The problem persisted when I tried to hide the label before updating the caption, and then showed it again. I also tried using different backgrounds and transparancy settings.
I am using PPC2002 and eVB 3.0.
The label is 65 pixels high and 110 wide, uses Arial font at size 42
The pictureBox is 102 by 102 pixels
Any suggestions is appreciated.
Thank you
- Niklas Ringdahl
Solution To Non Flickering Resizing/moving Of All Types Of Controls
Hi.
Some time ago i posted a question about the following subject:
"how can i make a control appear to slide in the screen without seeing it flickering like hell or making it look stupid"
well, not needed to slide in, but just an animation would be fine.
I bumped the subject a couple of times but no reaction at all. After a lot of trying i found a solution that worked quite well. Any reactions?
Hope it works fine,
Greets, Dee.
In this example i explain how to resize a form, and make it look like it is
animated. It starts to change dimensions fast and then slowing down after some time. The slow down effect i achieved by implementing a simple powerfunction.
---------------
set timer at interval=1 en standard enabled=false
Code:
dim newformwidth as double
Public Sub TMRAnimatie_Timer()
me.Width = newformwidth
End Sub
Code:
Public Function CollapseSideScreen()
Dim widthnow As Double
Dim widthfinal As Double
Dim widthdiff As Double
Dim actiontime As Double
Dim starttime As Double
Dim endtime As Double
Dim passedtime As Double
widthnow = me.Width
widthfinal = 1000 'insert wished width value here
actiontime = 1.2 'seconds , can be replaced
starttime = Timer
endtime = starttime + actiontime
widthdiff = widthfinal - widthnow
animationchange = False
TMRAnimatie.Enabled = True
While Timer < endtime
DoEvents
passedtime = Timer - starttime
newformwidth = widthnow + widthdiff * (1 - Exp(-passedtime / (actiontime / 10)))
Wend
TMRAnimatie.Enabled = False 'stop timer
TMRAnimatie_Timer 'call timer one last time or you might miss last change made within while statement
End Function
Some extra explanation:
newformwidth = widthnow + widthdiff * (1 - Exp(-passedtime / (actiontime / 10)))
sets the width at the previous width + the difference old-new times a factor 0-1
the function 0-1 is basically:
(1-e^(-t/C)) with in this case C = actiontime/10 because it makes sure that 99% of the change is done in around 80% of the time
Try plotting the fuction with t variable and a certain C, you will see that the function rises quickly to 1, and then slowly dims out till it reaches one eventually.
...........
Why not do it with just a timer?
This makes it impossible to control the actual speed for different controls to change/resize. This because timers are very inaccurate
Why not do it within the while - wend function?
Because of the doevents in the function you will see that the resizing will go extremely weird. You will also notice the screen will flicker. This is, i think, because there are too many changes. The screen simply cant refresh the UI fast enough.
Leaving the doevents solves the problem. A very accurate resizing can be seen. However... You cannot do anything else at that moment till the progress is done.
I hope this was somehow valuable
Moving Picturebox
ok, here's my question :
I put one picturebox on the left of my form on the foreground and one picturebox on the
right of my form on the background. You can select the left picturebox by clicking on it, if you then click on the
right pictebox (on the background) the left one will be moved on top of the right one.
Can somebody please tell me how I can do this I've been searching for days... :'(
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In my program, I'd like to implement like following.
At first, there is a picture.
Once I click picture box, the line wrap the picturebox appears.
If I drag and move and then drop, picture box is moved to there.
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I am wanting to move text from one position in a "PictureBox" to another by seemingly clicking and dragging and having the text appear to be moving along with the mouse pointer.
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At the moment I have worked around this by using a rectangle that represents the boundary of the text in question which is functional but I would like to advance this is possible.
Does anyone have a solution for this?
Thanks in advance, CrazySchmidt.
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I didn't know what to fill in at [Size] and [ColorDepth] so the result was:
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Chris
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Any help would be great!
Thanks in advance!
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Hi All !
How can I load a BMP (c:a.jpg) on Picture1.
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Thanks !!!
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umm hey. i just want to know how to change a picturebox's picture. heh yea it's a newbie's question. i'm just a kid in highschool doing a history project. lol
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Mathy
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Hello,
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Thankyou in advance
Nick
Edit:
So far I have constructed this code, but what happens is, I set the interval to say 10000, so it waits 10000 milliseconds and then exceutes within the space of one second, which is too quick to really see it moving slowly, how do I slow it down even more? So that it is a smooth move over about 4 seconds or so?
Private Sub Timer1_Timer()
While Image2.Left < 9240
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I assumed that if I set the interval to 10000 it would run this routine every 10000 milliseconds until the Image2.Left = 9240?
How-to: Drawing With Picturebox (simple && Sample Code ;) )
edited
mistake in this file. get the next one, please
--------
www.tac822.net - tablatures i acords per guitarra en català
www.tac822.net - tabs and guitar chords in Catalan.
- Catalonia IS a nation -
Edited by - johnminkjan on 11/23/2005 10:57:11 AM
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Please take a look at this as it is related to my question
Thread
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VB Code:
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Thanks!
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-thanks
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I've searched this forum, but haven't figured out my problem.
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Hi,
I have many child forms (MDI Form also) with many, many textboxes on it. When i run the save procedure, each form opens up, data is saved, then form closed, the next form is then loaded and so om.
The problem is that the rate of loading / unloading is uick and the screen flickers as a result.
I have tried to use the "hide" and "visible=False" in the code to no avail.
Is there a way to hide the program as it saves the data, then show it again when the save process has completed ????
The Flickering...
I can't beat damn flickering on my form. I'm still not 100% what is actually causing it... I think it might be the PlayNextSong Function.
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How do I eliminate the flickering on controls like windows media player, picture control, image control, etc.
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