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Steps to reproduce: 1. Use Eclipse Neon I-build: I20160313-2000 and onwards build which contains SWT HighDpi autoScale feature.(SWT bug 479614) 2. Launch this Eclipse on 100% zoom setting. 3. Open Find/Replace dialog and place it to the right size of the workspace. 4. Now close this workspace, the location and size of this dialog is saved in below file: <Workspace>\.metadata\.plugin\org.eclipse.jtd.ui\dialog_setting.xml 5. Now using the same monitor, change the zoom setting to 150%/200%. 6. Use this Eclipse(as in step 1) and open the same workspace. 7. Try to open the Find/Replace dialog.. it wont' be visible, because the location/size have been auto-scaled. [To get this dialog back you need to press "Alt + Space" then select maximize] Expected behavior:- Eclipse dialogs bounds shouldn't go beyond the screen dimensions. Possible solutions: Either cap the size of these dialog bounds(location/size) to not to go beyond the screen dimensions or (if possible) we reset the workspace dialog states when device zoom change is noticed.
The general problem of storing window locations that end up outside of the display area is independent of the HiDPI setting. You could produce a similar problem by switching from a huge monitor to a VGA. This general problem is already solved in org.eclipse.jface.window.Window#getConstrainedShellBounds(Rectangle). The actual problem was that Display#getMonitors() returned Monitors whose coordinates were not scaled down. Fixed with http://git.eclipse.org/c/platform/eclipse.platform.swt.git/commit/?id=c53936dceeaaebf51a17a15fd42cf358c3c2feca
Verified in I20160317-0200.
