Replacing Image(Device, ImageData) constructor in DefaultRangeIndicator with Image(Device, ImageDataProvider) #3003
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…or with Image(Device, ImageDataProvider)
fedejeanne
reviewed
May 22, 2025
...org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/DefaultRangeIndicator.java
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…/texteditor/DefaultRangeIndicator.java Co-authored-by: Federico Jeanne <[email protected]>
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DefaultRangeIndicator previously used
Image(Device, ImageData)constructor to draw a grid to display the selected range.Previously, the grid was rendered using a 1×1 pixel checkerboard pattern (blue and white), which was mainly inteded to work at 100% zoom. However, at higher zoom levels (e.g., 150%, 200%), the visual intensity of the pattern becomes different, causing the grid to appear visually inconsistent across zooms.
Figures below uses Image(Device, ImageData)
200%
100%
The new implementation uses
Image(Device, ImageDataProvider)adapts the grid's block size based on the zoom scale. Instead of always using 1×1 blocks, it calculates the block size by rounding the zoom factor:For zoom levels like 100%, 125%, etc., block size = 1 (no change).
For higher zoom levels like 150%, 200%, etc., block size = 2.
This means the grid will now use 2×2 rectangles for higher zooms, resulting in a visual appearance that better matches how the original 1×1 pattern looks on standard (100%) displays. This preserves visual consistency across different zoom levels and monitor scaling settings.
Figures below Uses Image(Device, ImageDataProvider)
100%
125%
150%
175%
200%
Contributes to vi-eclipse/Eclipse-Platform#199