I developed a small tkinter GUI to display (and export) images stored in a proprietary format. I managed to load the data into a 3D numpy uint8 array. I want to display one slice of that 3D array in a tkinter.canvas. To do so I used ImageTk.PhotoImage.
Underneath the Canvas I inserted a tk.Scrollbar. My goal is to use that scrollbar to let the user actively "scroll" though the 3D Array. Basically when the slider is moved or any of the arrows is pressed the slice corresponding to the slider position should be displayed in the canvas.
Right now I have the issue that I don't understand how to set the range of the scrollbar to my z-Dimension and then how to bind the scrollbar events to the movement or arrow actions to update the canvas.
Right now I don't have example code since this is a more conceptual problem.
Could you point me in the right direction how to solve this?
Best TMC
edit: Photo
Tkinter Gui with Canvas and Scrollbar
The solution is to use tkinter.Scale instead of tkinter.Scrollbar . As a side note, the command within:
scale = tk.Scale(yourTkFrame, from_=min, to=max, orient='horizontal', command=doSomething)
passes two values to the function doSomething.
Using the Scale allows to use the scale.get() method to retrieve the position between min and max values. Those can then be used to set the image corresponding to the selected position on the slide.
Related
I'm trying to create a sprite's animation using an animation sheet on Godot 3.1 but when I select the number of Hframes and Vframes, it doesn't correctly select the sprite texture; it takes a little bit of another frame.
Is there a way to solve that? a way to select the size of the frame selection or something?
it takes a little bit of another frame
This is more than likely due to your predefined grid step, for example, if your sprite atlas or sprite sheet says that each cell is 16x16 then you must set it to that instead of something like 32x32.
Once you do this the grid will properly align to each sprite. Note that the example below I'm using a Sprite Atlas
I have this IText object within a parent Group object.
When I select the Group and resize it horizontally (and vertically as well) the IText resizes as well which makes the text Strech and look awfull.
Now what I would like to do is have the IText center itself (keeping its aspect ratio) within the Group.
How can I do that. I tried modifying the Width and Left of the IText when the object is scaling, but that did not work.
try use latest fabricjs version ( 1.6.0.rc1 ) and instead of using fabric.IText use fabric.Textbox.
This new class has the properties you are looking for, the controls normally used for scaling are instead used for resizing the element and the text flows inside it.
I was not able to make the latest fabric.Textbox work exactly like I wanted.
Luckily, I found a way of making the fabric.ITextcenter horizontally when the parent fabric.Group is resized horizontally and also make the same fabric.IText Text grow in size based on the vertical resize. No ugly text stretch.
Here is the solution:
https://jsfiddle.net/t44wyday/46/
I've showed a dicom image successfully with vtkImageviewer. Then I realized that vtkImageviewer2 would be more suitable, as I needed interactors and load images with slices, maybe 3d, etc
So I changed to vtkImageviewer2. Then I just see a white image. All white.
But my surprise was that, adding the render window interactor, when I press r... the image appears! So I looked into the class code. I saw the reset event and how it sets color window and color level. I've tried doing this, with poor results.
Why do I have to reset the window/level to see the image? I can do zoom, and rotate... around the white plane.
I did a widget->Update() or a imageViewer->Render() with the same result.
The Window Width/Level value is not computed initially, the default values are W255/L127.
It is necessary to set appropriate values. i.e. from Dicom Header Information or compute them by yourself.
myVtkImageViewer2->SetColorWindow(myWidthValue);
myVtkImageViewer2->SetColorLevel(myLevelValue);
Setup window/level values from your vtkImageActor:
vtkImageActor->GetProperty()->SetColorWindow(20);
vtkImageActor->GetProperty()->SetColorLevel(10);
I have a question in corona sdk. I need to fade top part of an object (like 60px of 250px) when moving the object to top before it goes out of the screen.
In another word, I need to set a display area for an image or object which its height is more than screen height. Like a top padding space which image will be faded when moving out of the display area (not the screen area)
Any tutorial or suggestion?
Sounds like image masks are exactly what you need.
In your case you would need to set the mask when moving the object to top, unset it when it comes back.
You can check the documentation for masks here:
http://docs.coronalabs.com/guide/media/imageMask/index.html
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.