dbarstis060697
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Columns To Pixel Conversion Help Needed
Does anyone know how the column field from a TextArea is converted to a pixel width when given row and column parameters (i.e. TextArea(rows,cols))?
I want to extend the List class and include a column parameter. Everything is working except the width and height of Dimension are in pixels. Rows are
already converted (List(rows, multipleSelections)).
I want to extend the List class and include a column parameter. Everything is working except the width and height of Dimension are in pixels. Rows are
already converted (List(rows, multipleSelections)).
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That will work for fixed width fonts, for variable width though I would sugest you use the string "isGW"(or the sum of the character widths in the string) and obtain the average width. This string will provide a fairly close to true average length.
On a variable width font, you can fit 4 or 5 i's in the space ocupied by 1 W.
Another way you can go about this is to predetermine the maximum size of a textField (I can provide code for a subclassed textfield in which you can specify the max. input length). You could then provide a sample string for width measurment of the exact length you wish to operate with.
One final option, albeit ugly, is tu use a native method to call your windows (or XWindow's) environment and call its getFontMetrics.getAverageW
On a variable width font, you can fit 4 or 5 i's in the space ocupied by 1 W.
Another way you can go about this is to predetermine the maximum size of a textField (I can provide code for a subclassed textfield in which you can specify the max. input length). You could then provide a sample string for width measurment of the exact length you wish to operate with.
One final option, albeit ugly, is tu use a native method to call your windows (or XWindow's) environment and call its getFontMetrics.getAverageW
ASKER
Thanks for the info. All I wanted was the convenience of specifying a column width similar to a textArea. I have a list
and textarea on the same frame and wanted them to act the same.
If it's done to a textarea, one should be able to do it to a list
the same way.
and textarea on the same frame and wanted them to act the same.
If it's done to a textarea, one should be able to do it to a list
the same way.
ASKER
By setting the font, I can guarantee a fixed length. Then
what about using charWidth? i.e.
public Dimension preferredSize () {
FontMetrics fm=getFontMetrics(getFont(
// the character W used as reference
return new Dimension
(fm.charWidth('W')*width, fm.getHeight()*height);
}