![]() ![]() Although an application can draw a rectangle by calling the Polygon function, supplying the coordinates of each corner, the Rectangle function provides a simpler method. Use the ID2D1RenderTarget::FillGeometry method. 5 contributors Feedback A rectangle is a four-sided polygon whose opposing sides are parallel and equal in length. Use this method when your opacity mask is a bitmap and you want to fill a rectangular region. Reply: Avi Malki: " Fill all histograms in the same color. The FillOpacityMask method paints a rectangular region of a render target and then applies an opacity mask, defined by a bitmap.I guess there could be a condition in the resizing method to prevent this from happening. It appears that the canvas window is first opened and then resized and in that process ROOT assumes a window size smaller than the real one.Ģ) When I plot histograms, the axis values are automatically resized to happily overlap. This results to an ugly zone running horizontally at the bottom of the canvas window that looks transparent. Messages sorted by: ĭear Rooters, I want to report two bugs I have been experiencing for a long time and I presume they shouldn't be too difficult to fix.ġ) When I open a canvas in Win32 very often the size of the window addressed by ROOT is smaller than the true window rectangle.Reply: Avi Malki: " Fill all histograms in the same color.".Maybe reply: Faine, Valeri: "RE: Win32 Canvas bug + axis label bug".Next in thread: Faine, Valeri: "RE: Win32 Canvas bug + axis label bug".Previous message: Nicolas Produit: " get elements of a TMatrixD".Next message: André David: "Re: MySQL error".Is there a reason windows doesn’t double buffer? It seems like a superior solution with no apparent heavy performance hit.RootTalk: Win32 Canvas bug + axis label bug Win32 Canvas bug + axis label bug From: Dimitris Sideris ( Mon 18:43:50 MET From windows being activated … behind windows, or certain interface elements glitching, or whatever. Yes, I have always had to do the windows fine tuning as a last step for years. The other way around, an app produced on Windows and carefully tuned to avoid flicker will generate Mac and Linux executables which will be as smooth as silk. Unfortunately, Xojo’s promise of “develop once, compile many”, cannot be fulfilled when one platform allows stacking controls, and the other not.Ī lot of Xojo developers develop on Mac and generate apps for Windows and Linux that they run in VM, so they have no idea that on a regular PC, their apps become flickery and don’t look professional. I do spend most of my development time on Mac, but I always make sure to do the last mile on a regular PC, to make sure my customers will have the best user experience. I refactored it to use a single canvas, and it does not flicker more than the Mac version, meaning not at all. win32 - How to draw a rectangle around a text string 1. Drawing a border around my window with GDI, doesnt work 4. When I add the following code I, my whole window becomes transparent (borders are also tranparent. Using SetLayeredWindowAttributes (hWnd, RGB (0, 0, 0), 128, LWAALPHA) and a window style of WSEXLAYERED, Ive managed to make the entire window semi-transparent, but that also includes the text. What I want is a transparent window for clicked area but nontransparent for border. Draw Slightly Transparent Blue Rectangle in Native Win32 GDI. Using the Windows API, Im trying to draw opaque text on a semi-transparent background. at 3:14pm Disch (13742) If you are using the Rectangle WinAPI function, it will use whatever brush is currently selected into the DC to fill the rect. Google only finds how to draw Filled rectangles. Graphics g(hdc) SolidBrush blueColor((Color(255, 74, 134. how do i draw a simple 'transparent' rectangle (Win32 GDI). On Windows, the very same source produced an app which was simply unusable since it flickered like fireworks. This is how I draw a rectangle using GDI+. NET's platform invoke feature (P/Invoke) to send a Win32 message that. My app Watermark on Mac uses several canvases and does not flicker any single bit. If your window is roughly rectangular in shape, the easiest approach is to add a. Mac has screen double buffering in hardware, that is not the case for most every graphic card on PC.Īs a developer, you should take into account the hardware and software platform. ![]() And, additionally, with the hardware platform. Transparent pixels arent copied to the destination surface during blitting. It has nothing to do with modernity, it has everything to do with Windows itself. Basically, youre simply copying a rectangular bitmap of pixels from one. It seems incredible that flicker on windows is still a thing these days. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |