I'm using a PiTFT on my pi and running a JavaFX program. I got the output going to the PiTFT by running fbcp in the background.
I had to set disable_overscan=1 in /boot/config.txt to get it to show the whole image. That all works fine now.
My problem is that the touch screen calibration doesn't seem to effect JavaFX apps. The X and Y axis are swapped. Does anybody know how to calibrate the touch screen for JavaFX apps?
I don't know if this is a problem with the touchscreen driver for the PiTFT or a JavaFX configuration problem, so I'm going to post the same question to the adafruit forums and if I get an answer in one place, I'll copy it to the other.
I've struggled with the same problem today, and I managed to figure it out.
The PiTFT is by default a portrait display with a resolution of 240x320. The driver conf is originally made to rotate the display. The touchscreen setting for X are aware of that and have the rotate option set accordingly. And yes, this will not affect JavaFX since it doesn't run in X.
What I did:
in /boot/config.txt
disable_overscan=1
framebuffer_width=480
framebuffer_height=640
#set specific CVT mode
hdmi_cvt 480 640 60 1 0 0 0
#set CVT as default
hdmi_group=2
hdmi_mode=87
hdmi_force_hotplug=1
With this, the main display resolution is set to 480x640, and overscan is disabled.
Next, in /etc/modprobe.d/adafruit.conf, change the rotate option to be 0.
Save everything and reboot. Then fbcp & java Main, and it should be working OK.
Btw, be aware that I used the pre-built raspbian image from adafruit.
Related
I am working on a existing Qt application and trying to support it on 4K monitor. For scaling the app, I am using "QT_SCREEN_SCALE_FACTOR" and scaling fonts based on logical DPI of screen. Everything is fine till this. Fonts for ribbon, docked windows are ok after scaling. But the font is getting too bigger for floating forms (pop up dialogs) and the docked widgets after undocking (the moment window is undocked, font is becoming bigger). I don't understand why this is happening. Is windows taking control over floating forms and making font bigger? Or am I missing something?
I am not using "Qt::AA_EnableHighDpiScaling" or "QT_SCALE_FACTOR" because I did not find these useful for me.
Has anyone faced this kind of problem?
Please let me know if someone knows about this.
After trying this and that, I found a solution to this problem.
I added'QGuiApplication::setAttribute(Qt::AA_DisableHighDpiScaling);' before creating QApp. And then I just needed to change the font size.
I'm trying out a 43Inch screen and I'm using the gnome shell extension gTile, and I can't figure out how to:
have a preset to bring all windows to center with predfined dimensions, i.e. 70%x50%
have a hotkey to bring the current window to center with same predefined dimensions
have a hotkey to set all windows in right or left column, i.e. devide the screen in half.
Any ideas how to go about it?
The built in decsription doesn't tell me much:
Thanks in advance!
is not implemented, 2. is a standard gTile functionality with preconfigured hotkey Super-Alt-5. 3. There is autotile in multiple columns, you need to autotile in 2 columns. Super-Enter to activate gTile, then 2 (means press 2).
I was given a new laptop at work and when I switch back and forth from a docking station, RStudio seems to have problems realizing the change in display, while all the other programs seem to auto-detect and re-zoom appropriately. The only fixes I've found is logging out and back into my Windows user account, or going through R-Studio's View>Zoom-in or View>Zoom-out when going back and forth between docked and undocked, which takes time.
There's not some setting I'm missing, is there, so RStudio detects the type of display and auto-adjusts? Example images below.
thank you, dave
This is a known issue, and there is some indication that there are plans to address this in rstudio v1.2.
https://community.rstudio.com/t/dramatic-screen-resolution-issue-see-screen-snip/3703/6
A workaround suggested here:
You should be able to work around this by toggling the Zoom level in the Appearances pane
RStudio is basically a browser window (chrome web application). It will render according to the resolution of the screen, at the current zoom setting. It will not change your zoom level as you switch monitors. Ctr- and Ctrl+ are shortcuts for zooming in and out, where you should also see a popup with a reset (to 100%) option.
Zooming is not the same as changing font sizes, which is the preferable way of ensuring a good visual experience for a resolution.
Downloaded the testScrollView file and can't get it to work right.
https://github.com/C4Code
It seems everything is in order for the most part, no major errors pop up or anything, but when I try to run it on the simulator it pops up in the bottom right saying "destination buffer size too large (15360 x 768); cannot be larger than 4096 x 4096", and the debugging window pops up as well.
Is there some sort of special command that needs to be added?
I ran into this issue last week, apparently the simulator doesn't like the large image. However, this example works just fine on a device. The reason is that there is a large 15360x768 image that the example breaks down into 256x256 tiles.
Try compiling for an iPad if you have access to one.
Now i am using macbook pro with 13 inches.
Yesterday i upgraded XCodes version to 4.3.2.
In that iPad Simulator is too big and iPad Retina Simulator is also too big.
It's not fix my screen.
iPad Retina Simulator size is take all of my screen and it's can only show iPad's dock.
I can't see overview iPad screen.
I always scroll down and up to test.
When i change Simulator's Window > Scale into 75 %, It's still too big.
50% is too small and can't see anything clearly.
When i develop with XCodes 4.2 , iPad Simulator is fix size and okay to test.
I want iPad simulator size fix my screen.
Is there anyways?
If my question is out of question, so sorry for that.
Thanks.
Maybe it's because the iPad 3 have a really large resolution (2048x1536). That's more than most computer screens. You will need to zoom out to display the entire screen just because of this, or you must get a larger (higher resolution) screen for your computer if you don't want to scale the program.
The reason for this is that the iPad 3 have much tighter pixel density than most other computer screens so each pixel on the iPad is smaller than each pixel on your computer screen.
What you can do is make the simulator start by suppressing the title bar and your dock if it happens to be shown.
Follow these steps, please be responsible and back-up your files before editing anything as I do not take responsibility for things going wrong.
Before you start close any running simulators.
In Finder Press CMD+SHIFT+G and enter the folder /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/iPhone Simulator.app/Contents/; this folder may differ for you depending on your location of the simulator/SDK.
Backup the file called Info.plist
Copy Info.plist to your home directory.
Double click Info.plist in your home directory. You will be presented with the plist editor.
Select the first entry called Information Property List and click the plus (+) sign immediately to the right.
Enter Application UI Presentation Mode into the Key field of the new entry, tip: it will auto populate after typing Application UI.
Enter 4 in the Value field, this will then change to All Suppressed.
Save and close the file.
Replace the original plist file with this new one, remember to back the original up first.
Now when you run the simulator it will not show the menu bar when it becomes active. The reason you needed to copy the file to your home directory is because you do not have write permission to it. It also stops you mucking it up and preventing the simulator running while editing the file.
You can apply this trick to any application by finding it's plist file, thus I also change Xcode.app to do this too.
You will need to scale the simulator to 75%, however it will now be almost the full height of the screen with no loss of the iPad window.
Now It's more flexible with Xcode 9- Simulator. You can pick & drag any corner or simulator to resize it and set it according to your requirement.
Look at this snapshot.
https://apple.stackexchange.com/questions/205865/ios-simulator-screen-size-not-equal-to-window-size