flicker

I have some OpenCV project that view image on static control and has zoom in / out functionality. Here what I got : void UpdateImage(HWND hwnd, int zoom) { if(img) { RECT rc; HWND hStatic = GetDlgItem(hwnd, IDC_IMG); HDC imgdc = GetDC(hStatic); GetClientRect(hStatic, &rc); HDC hdcMem = CreateCompatibleDC(imgdc); HBITMAP hbmMem = CreateCompatibleBitmap(imgdc, rc.right-rc.left, rc.bottom-rc.top); HGDIOBJ hbmOld = SelectObject(hdcMem, hbmMem); HBRUSH hbrBkGnd = GetSysColorBrush(COLOR_3DFACE); FillRect(hdcMem, &rc, hbrBkGnd); DeleteObject(hbrBkGnd); SetBkMode(hdcMem, TRANSPARENT); int wnow = zoom

I'm learning Java by making a small game in a JApplet. I got a little problem with my sprite's animation. Here is the code : this.sprite.setBounds(0,0,20,17); this.sprite.setIcon(this.rangerDown); for(int i = 0; i< 16;i++) { this.sprite.setBounds(this.sprite.getX(), this.sprite.getY()+1, 20, 17); this.sprite.update(this.sprite.getGraphics()); try{ Thread.currentThread().sleep(100); }catch(InterruptedException e){ } } It left some flicker during the animation. Once the animation end, the flicker disappears, but it's kind of ugly... I guess there is some step I missed. I use this method because

I'm observing some flickering during the resizing of an animated canvas control. You can see it in action at this page . Drag the 'width' slider left and right to try it for yourself. I see this flickering in Chrome 26.0.1410.43 running on Linux. Currently this page won't work in Firefox until it supports HTML5's <input type="range"> . I've tried to reproduce the issue on a smaller scale in this jsFiddle . It's not as noticeable, but occurs for me when the canvas is around 90% of the available width wide. The code traps requestAnimationFrame , and resizing wipes the canvas. I would hope that

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I'm been googling for days, and all I'm getting are the same answers, but is not what I want (I will describe what I do not want later). What I want is: Say I have a parent dialog that has a few CStatic child controls. The parent dialog uses black as its background when in focus, and gray when not in focus. The child static controls simply display text, but its background needs to follow the parent's background color Problem: I can get the child-controls to always track the parent's color, however the process of updating the color is slow and causes flicker. When I make the dialog to go in