> When a Window is created with a certain X/Y coordinate to place it on a > specific screen, and is subsequently shown for the first time, one of the > first things it does is size the window according to the size of the Scene. > It does this based on the render scale of the *primary* screen as it has not > moved the peer yet to the correct screen. After the scene has been sized, it > is moved to the correct screen, triggering a change of render scale, but not > a resizing of the Window (as this is only done once). > > The result of this is that due to slight difference in render scale, the size > calculated for the scene may be a few pixels off. As the scene's preferred > size is used for this calculation, even a few pixels too small can result in > Labels being shown with ellipsis on the intended target screen with a > different render scale. > > When observing the render scale X or Y property, one can observe a change > from 1.0 (the default value) to 2.0 (the primary screen's render scale) to > another value (depending on the target screen). However, the Window involved > (being positioned by the user using setX()/setY() before it is shown) was > never shown on the primary screen, yet the size calculation assumed it was. > > To solve this problem, the peer should be moved to the correct screen > **before** asking the Scene for its preferred size to use as the initial > Window size. Doing so (by adding an additional `applyBounds` call) also > results in the render scale properties to only change once (or not at all) > from their default value to the target screen's value (or not at all if the > target screen is 1.0 scale).
John Hendrikx has updated the pull request incrementally with one additional commit since the last revision: Add debug output ------------- Changes: - all: https://git.openjdk.org/jfx/pull/2007/files - new: https://git.openjdk.org/jfx/pull/2007/files/3afd9536..cf9cf570 Webrevs: - full: https://webrevs.openjdk.org/?repo=jfx&pr=2007&range=01 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=2007&range=00-01 Stats: 10 lines in 1 file changed: 10 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/2007.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2007/head:pull/2007 PR: https://git.openjdk.org/jfx/pull/2007
