Note: The JBS issue [JDK-8207333](https://bugs.openjdk.org/browse/JDK-8207333) refers to Linux, but it happens on macOS too.
When a TableColumn has a ContextMenu, if the user right clicks on the tableColumnHeader, the ContextMenu shows up, but, as described on the issue, on macOS and Linux, the table gets sorted as well. Currently, `TableColumnHeader#mouseReleasedHandler` checks for `MouseEvent::isPopupTriggered`, but it doesn't have a check on `mousePressed`. However, it can be seen that a right click on the header has the following values for `MouseEvent:: isPopupTriggered` on the different platforms and mouse pressed and released events: | isPopupTriggered on: | Windows | macOS | Linux | | ------------- | ------------- | ------------- | ------------- | | mousePressed | false | true | true | | mouseReleased | true | false | false | Also, the JavaDoc for `MouseEvent:: isPopupTriggered` clearly states that: > **Note**: Popup menus are triggered differently on different systems. > Therefore, `popupTrigger` should be checked in both `onMousePressed` and > `mouseReleased` for proper cross-platform functionality. Therefore, this PR adds a check to `MouseEvent::isPopupTrigger` in the mouse pressed event, that can be used later on to cancel the header sorting when the mouse released event happens. Also a system test has been added. It fails on macOS and Linux, and passes on Windows before this PR, and passes on the three platforms with this PR. ------------- Commit messages: - Check popupTrigger on mouse pressed too for tableColumnHeaders Changes: https://git.openjdk.org/jfx/pull/1754/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1754&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8207333 Stats: 164 lines in 2 files changed: 162 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jfx/pull/1754.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1754/head:pull/1754 PR: https://git.openjdk.org/jfx/pull/1754
