I'm trying to display a number on a board with lines (go game). Right now, the number is displayed on top of a cross, so it's not very easy to tell. See the screen shot below
The background is drawn with setBackgroundBrush() on the scene.
The lines are QGraphicsLineItem which are added to the scene after the background.
I've tried to display a small portion of the background below the number but the effect isn't great. Is there a smart way of doing this so that when the number is displayed, the area that's covered by the number only shows the background texture and not the lines?
Related
I'm making an emacs-esque toy text editor. At startup, there's one large window (a QTextEdit derivative) in the top center of the screen, with a minibuffer (QLineEdit derivative) underneath. Both of the actual editing widgets are contained in the grids of parent classes called Window and MiniWindow (Window also keeps track of a QLabel that appears directly beneath the QTextEdit).
My Window object is at location 1, 1 in the grid, and my MiniWindow object is at 2, 1. I've set content margins to 0 and spacing to 0, which looks great at first, but when I try to grow the window by dragging on the corner, this starts to happen:
As you can see, the screen is divided into two rows (as it should be), but half of the vertical length of the screen is dedicated to each row. What I need is for the top Window to stretch its length during resizing so that it is always adjacent to the MiniWindow underneath. Is there some other option I need to be setting?
Nevermind, got it.
I was having this problem because the QLineEdit object was in the grid of my container class, MiniWindow. The height of a MiniWindow object is free to vary with the window resizing in a way that a QLineEdit alone would not be. The fix was set to the maximumHeight of MiniWindow to approximately the height of a QLineEdit, which is around 16.
Works great now.
I got a RGB332 LCD and a poor MCU to drive it . The MCU do not have a hardware accelerator nor do RGB332 display support an alpha path.
So I used the color "black" as a "alpha color" to deal with icon paste work.Which means I fill the icon color data to background buffer while the data is not black.
The problem I meet is that the icon showed it's own antialiased edge while the background is not black. And the "antialiased edge" just makes an edge effect from the background.
Is there any way to deal with the situation ?
The main problem is that I don't have "Layer" and "Alpha" to do the PS-like merge work.
But the Icons are Pasted to a Frame buffer one by one.
So my solution is :
When each icon is being pasted,I could decide the front/background,
which means I could detect the "antialiased edge" of the icons just
like I have "layers".
After I find the antialiased edges ,I filled the pixels with the
middle color of the front/background.
The LCD is RGB332,and the middle color calculation is just filling
the edge with 75% background color + 25% front color. If the icon
color is carefully designed, you don't even need a float calculation
.
The work maybe not that effective ,but really solved my problem.
I have a chart show info of apps, but when run it on devices android. The position of text on chart not consistently.
These images illustrate the problem: https://drive.google.com/folderview?id=0B7-CxJHQ5ZnjYjVlTlFQdElWRGM&usp=sharing
I use TextLabelWidget in AndroidPlot. How to keep position of TextLabelWidget on chart with the same image1 in link above on devices?
The problem appears to be that your plot area is set to fill the width of the screen and since the bars are evenly distributed in that space, their x positions are essentially fractions of the screen width.
At the same time you have labels that appear to be positioned using absolute positioning. As an example, this code will position 4 labels at 0%, 25%, 50% and 75% screen width, 80 pixels down from the top of the screen:
txtWidget1.position(0, XLayoutStyle.RELATIVE_TO_LEFT, PixelUtils.dpToPix(80), YLayoutStyle.ABSOLUTE_FROM_TOP, AnchorPosition.LEFT_TOP);
txtWidget2.position(0.25f, XLayoutStyle.RELATIVE_TO_LEFT, PixelUtils.dpToPix(80), YLayoutStyle.ABSOLUTE_FROM_TOP, AnchorPosition.LEFT_TOP);
txtWidget3.position(0.50f, XLayoutStyle.RELATIVE_TO_LEFT, PixelUtils.dpToPix(80), YLayoutStyle.ABSOLUTE_FROM_TOP, AnchorPosition.LEFT_TOP);
txtWidget4.position(0.75f, XLayoutStyle.RELATIVE_TO_LEFT, PixelUtils.dpToPix(80), YLayoutStyle.ABSOLUTE_FROM_TOP, AnchorPosition.LEFT_TOP);
There are some other factors that you are also probably going to need to deal with such as bar width but this should get you closer. You may find this doc useful as far as a guide for the different positioning methods.
Another tool to consider using if you aren't using it already is the Configurator. This will let you set your positions etc. inside xml and override values based on screen size, orientation, etc.
Is there any program that can convert a file into an animated gif by taking the bytes (whatever I see on an editor is seen) and producing them on frames? Im trying to change a large script I wrote into an image so that if I run it, it looks like as if the code is scrolling. I would use photoshop, if I knew how to use it. Even then, the code is really big, so I dont want to be doing it frame by frame.
Whatever you see on the editor screen is ... a screenfull, so why not a screen capture program like http://www.faststone.org/FSCaptureDetail.htm
However, I suspect that you want to convert the entire file to a gif, since you talk of scrolling. Is that so?
If so, be aware that animated GIFs are limited to 8 frames, so you might want to convert to another movie format.
You could, for instance, Google for "text to MPEG". If nothing does it directly, get something that adds subtitles & make your video a solid white background *or match your webpage).
Maybe simpler is something like this ...
A Scrolling Text Applet - Now Free. - Provide an animated look and feel to your web pages. Scrolling Text is a Java applet that will automatically size itself to the available area given to it by the HTML form via the WIDTH and HEIGHT properties of the APPLET tag. There are many configurable features of this applet including title, colors, font size and style, border width and color, graphics, background images etc.
Configurable parameters including;
Background Color - Define your desired background color
Title - If you want a stationary title then include this parameter
Font Size and Style - All text can have it's own Font size and style
Text Color - Specify the color of the text with this one
Border Width and Color - If you require a border then define it with these 2 parameters
Scroll Speed - Customise the Scroll Speed
Display Time - Vary the Display time of each page
This applet is easy to implement and configure and along with the example and help files you should have no trouble implementing your own customised Scrolling Text in your web pages. No understanding of java programming is required, everything is adjusted by parameters in the HTML tags.
Now FREE.
+1 for an interesting question.
I've been stumbling over this for a while and was wondering if anyone has run into this problem before.
The application I'm working on is divided into multiple data plots and a single timeline at the bottom of the screen. Each plot (which is actually multiple textures layered on top of each other) as well as the timeline is rendered to a separate texture. The timeline texture is rendered first, followed by each of the plot textures from the top of the screen to the bottom. I am using DXUT and DirectX9 (March 2009).
After adding time text to the timeline texture, I noticed that the text was repeated in the title bar of every data plot. Here's a screencap of a portion of the display, it shows just a single plot, but the text repeats on every plot opened:
It seems like it is tied directly to the DrawText being called in the timeline's render function. I do use relative coordinates as the rect being passed to DrawText, but since I've already set the render target to the desired texture it should only affect the current texture. Not every texture rendered afterward.
Has anyone ever run into any problems similar to this using D3DXFont?
EDIT: After some more experimentation, it looks like it has something to do with the Z buffer. By adding D3DCLEAR_ZBUFFER to the clear on each texture surface, the duplicate text is gone. While the problem seems bypassed for now, I'm still curious as to why the Z buffer for a completely separate texture was being written during my DrawText call.
The Z Buffer state is persistent.
For example,
SetDepthStencilSurface(X)
SetRenderTarget(A)
Draw()
SetRenderTarget(B)
Draw()
Both Draw calls will use the same depth buffer.
The DrawText is not changing the depth buffer that you have set. It assumes you meant to do what you did.