I have a JTextPane with some styled text in it and i am trying to scale them.
What i mean is that assuming that the text inside the JTextPane on startup is a 100% in size. After i click some JButton all the font size of the entire document is reduced to 25%
The thing is that this JTextPane contains alot of text that has different font sizes thus i want each of their respective font sizes of the character to be 25% of its original value.
Does anyone know how to do this?
But is there another way i could achieve the scaling of my styled text in my JTextPane so that it is 25% of its original value by means of subclassing my JTextPane or StyledDocument class and overiding its paint method?
I tried adopting you way and tried to it but the program does not seem to work.
Here is a full compilable example where you can compile the code and see what i mean
The thing is that the text is scaled corretly but ScrollPane screws up completely and the typing of the text is not accurate
Is the way i am scaling the JTextpane correct?
Any help is greatly appreciated
Joined: Jan 14, 2004
What you are doing with the various 'getXXXSize' methods is changing the size of the JTextPane which will have an affect on the JScrollPane. In the 'setTransform' call in the 'paint' method you are scaling the entire rendering of the JTextPane by the scale factor. This is just like taking a photo of it and scaling it: text, borders, scrollBars ... everything is scaled. The 'paint' method is called to render the JTextPane component. Setting a transform for its graphics context affects everything in the rendering.
From reading your original question/intent this does not seem to be what you want. I think you want the JTextPane to appear at its normal size and the font sizes of all styled text to change by a uniform scale factor. If this is so then I can see two ways of doing this. The first is to save references to the parent Style objects as you create them and use these to change the font sizes by your scale factor. I tried to illustrate this in FontSizeTest.
The second way is to not save any references to the styles you set in the document at construction. When you are ready for scaling you get the document, enumerate through the styles in it, identify the ones that have a font size attribute and reset the attribute with the newly scaled size. This approach is a little more general and flexible than the first.
Trying to do this inside some kind of paint/rendering code may require some extensive research into the source code for JTextPane and the plaf classes that it uses for rendering.
Joined: Jan 07, 2005
I think you want the JTextPane to appear at its normal size and the font sizes of all styled text to change by a uniform scale factor.
Yes this exactly what i want to do
The second way is to not save any references to the styles you set in the document at construction. When you are ready for scaling you get the document, enumerate through the styles in it, identify the ones that have a font size attribute and reset the attribute with the newly scaled size.
I think the second way suits most of my needs but if it is of no inconvinience to you could you post a little sample on how to enumenrate through the document and find font size attribute and change i to the scaled value.
I have a little issue that i am also worried about in that the font size attribute take in an integer but when i get the scaling factor it will be a double. Yes i can cast it to an integer but would that not cause a lost of precision that could have huge effects on what i am doing?
I really appreciate that you are taking this time to answer my question craig wood