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Search found 85 results on 4 pages for 'onpaint'.

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• Invert the 1bbp color under a rectangle.

  - by Scott Chamberlain

  I am working with GDI+, the image I am working with is a 1bbp image. What i would like to do is draw a rectangle on the image and everything under that rectangle will be inverted (white pixels will become black and black pixels become white). All of the sample code I have seen is for 8 bit RGB color scale images, and I don't think the techniques…

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• Creating a image viewer window controll.

  - by Scott Chamberlain

  I am learning GDI+ and I am trying to make a display window with scroll bars (so I can only see part of the image at a time and I can scroll around it). I have read through the basics of GDI+ from several books but I have not found any good tutorials online or in books available to me about doing more advanced things like this. Any…

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• moving image to bounce or rotate in a circle

  - by BlueMonster

  I found this small application that i've been playing around with for the past little while. I was wondering, if i wanted to simply rotate the image in a circle? or make the entire image just bounce up and down, how would i modify this program to do so? Everything i've tried will just stretch the image - even if i do get it to move…

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• mfc tab control switch tabs

  - by MRM

  I created a simple tab control that has 2 tabs (each tab is a different dialog). The thing is that i don't have any idea how to switch between tabs (when the user presses Titlu Tab1 to show the dialog i made for the first tab, and when it presses Titlu Tab2 to show my other dialog). I added a handler for changing items, but i don't…

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• Winforms TabControl causing spurious Paint events for UserControl

  - by Tom Bushell

  For our project, we've written a WinForms UserControl for graphing. We're seeing some strange behavior when our control is sited in a TabControl - our control continuously fires Paint events, even when there is absolutely no activity by the user. We only see this in the TabControl. When we site our control in other containers…

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• Panning weirdness on an UserControl

  - by Matías

  Hello, I'm trying to build my own "PictureBox like" control adding some functionalities. For example, I want to be able to pan over a big image by simply clicking and dragging with the mouse. The problem seems to be on my OnMouseMove method. If I use the following code I get the drag speed and precision I want, but of course,…

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• How to create a TextBox like RichTextBox in WinCE 5.0 OS (C#)?

  - by SmartJJ

  Now I have the following ideas: 1.override TextBox's OnPaint Event,use Graphics to draw rich string-font; 2.use RTF to save and display the rich format. But I do not know which method is better or more difficult. In addition, there are other better way to do. Any ideas are inspiring!

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• A way to remove selected LineShape shadow effect?

  - by serhio

  Is there a way to remove the LineShape shadow effect when selecting the lineShape? I tried Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs) Dim g As Graphics = e.Graphics g.SmoothingMode = SmoothingMode.AntiAlias Dim oldmode As SmoothingMode = g.SmoothingMode g.DrawLine(_Pen,…

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• Need GDI programming Guideline

  - by Arman

  I want to change my window design rapidly. I have OnPaint function which I am calling when WM_PAINT message received. The design change only when the event occure. I want that design should automatically update doesn't depend on event kindly guide me how can I make it possible.

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• Custom activity designers in Workflow Foundation 3.5: How do they work?

  - by stakx

  Intent of this post: I realise that Workflow Foundation is not extremely popular on StackOverflow and that there will probably be not many answers, or none at all. This post is intended as a resource to people trying to customise workflow activities' appearance through custom designer classes. Goals: I am attempting to…

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• How to fix this python error? OverflowError: cannot convert float infinity to integer

  - by aF

  Hello, it gives me this error: Traceback (most recent call last): File "C:\Users\Public\SoundLog\Code\Código Python\SoundLog\Plugins\NoisePlugin.py", line 113, in onPaint dc.DrawLine(valueWI, valueHI, valueWF, valueHF) File "C:\Python26\lib\site-packages\wx-2.8-msw-unicode\wx\_gdi.py", line 3177, in DrawLine …

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• drag to pan on an UserControl

  - by Matías

  Hello, I'm trying to build my own "PictureBox like" control adding some functionalities. For example, I want to be able to pan over a big image by simply clicking and dragging with the mouse. The problem seems to be on my OnMouseMove method. If I use the following code I get the drag speed and precision I want, but of…

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• Save the zoomed image on Picturebox control using C#

  - by Vinay G

  Hi I had posted this question before but i did not get the answer Proper(i think people did not get my question ) so i am posting it now. I capture a image from windows mobile camera and save it on picturebox control..now to zoom the picture i am increasing its size by Onpaint event.The…

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• TabRenderer with no visual styles enabled?

  - by DxCK

  I want to draw a custom TabControl with custom functionality. To do this, i inherited the Panel class and overrided OnPaint method to draw with TabRenderer class. The problem is that TabRenderer working only when visual styles enabled (can be checked with TabRenderer.IsSupported), but what should i do if visual…

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• C# drawing and invalidating 2 lines to meet

  - by BlueMonster

  If i have 2 lines on a page as such: e.Graphics.DrawLine(blackPen, w, h, h, w); e.Graphics.DrawLine(blackPen, w2, h2, h2, w2); how would i animate the first line to reach the second line's position? I have the following method which calculates the distance between two points (i'm assuming i would use…

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• Issue with Usercontrol and Border Style

  - by Ram

  Hi, I have created a user control ( custom data grid view control). I have used the code specified at MSDN [site][1] [1]: http://support.microsoft.com/kb/316574 to set the border style . I am able to see the selected border style in designer. Like None, FixedSingle or Fixed3D. But when I set the border…

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• Multi color Edit Field (Win32)

  - by user146780

  I want to create a program that will parse text for key words and make these words a certain color. What type of control supports many different colors? Would I have to create my own, or override the OnPaint() of a basic control or something? (Id like to avoid making my own control from scratch) Thanks

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• Overlay painting over a composite UserControl

  - by Luca

  Is it possible to draw an overlay (using OnPaint, for example) over a composite UserControl? Actually the only painting I could get is over the UserControl, but it covered by Control instances positioned inside the UserControl.

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• User control disapear when added to a Panel

  - by dutt

  I've got a user control class that works fine, drawing, events firing and the works. When i programmaticly add it to a class that extends from Panel it disapears. I've checked around and the line that makes it disapear is the line where i go panel.Controls.Add(myuserControl). Without that line the…

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• Usercontrol and Border Style

  - by Ram

  Hi, I have created a user control ( custom data grid view control). I have used the code specified at MSDN [site][1] [1]: http://support.microsoft.com/kb/316574 to set the border style . I am able to see the selected border style in designer. Like None, FixedSingle or Fixed3D. But when I set the…

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• Taking screenshots in Windows Vista, Windows 7, with transparent areas outside the app region

  - by Steve Sheldon

  Hey Folks, I am trying to take a screenshot of an application and I would like to make the parts of the rectangle that are not part of the applications region be transparent. So for instance on a standard windows application I would like to make the rounded corners transparent. I wrote a quick…

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• How to dock CPaneDialog to MainFrm and.. ?

  - by JongAm Park

  Hello, I have problem with CPaneDialog. I tested with SetPaneSize MFC feature pack sample projects. What is weird is that CPaneDialog can't be docked to MainFrm while CDockablePane can be. The CPaneDialog is also a child class of the CDockablePane, but it can't be. Only DockToWindow(…

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• Expected ')' before '*' token

  - by Danni

  So this is more of a syntax problem. I keep getting the error "Expected ')' before '*' token" on the line: #include "CDocumentObserver.h" #include "CViewPlayerDlg.h" /* * Class: CViewPlayer * */ class CViewPlayer : public wxWindow, public CDocumentObserver { public: …

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• Scrollbar still is painted after it should be removed

  - by Walter Williams

  I have the following custom control and can place on a form (with AutoScroll set to true and the control anchored left, top and right). If the form is too short for the control, the form correctly resizes the control (to make room for the scroll) and displays the scroll bar. …

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• Is Graphics.DrawImage asynchronous?

  - by Roy

  Hi all, I was just wondering, is Graphics.DrawImage() asynchronous? I'm struggling with a thread safety issue and can't figure out where the problem is. if i use the following code in the GUI thread: protected override void OnPaint(PaintEventArgs e) { lock…

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