ScreenSelector enhancements #75
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The SelectionHighlightController is a useful class that can be used in combination with the ScreenSelector class. Thus, changed the ScreenSelection example application by pulling out the SelectionHighlightController and moving it to the gov.nasa.worldwindx.examples.util package.
Modified the ScreenSelector class by introducing additional behaviour. Added two flags, namely autoEnable and autoDisable (with getter and setter methods) to allow for auto-arm and disarming of the selector based on whether the user Control or Shift clicks before dragging the mouse.
The ScreenSelector class should not fire a selection event when a single-click is done on the map. It should only fire events when clicking and dragging a rectangle. The reason for this is that the single-click events will not contain any objects if it originates from the ScreenSelector. This can cause odd behaviour in terms of selecting an object and then deselecting everything. Thus, single-click select events should only be generated by the WorldWind canvas itself.
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Oh, another thing: the default behavior of ScreenSelector stays the same for clients that are used to the manual arming / disarming. You get the new auto arm / disarm behavior only if you set the two flags (autoEnable and autoDisable) to true. |
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I made some modifications to the screen-selection classes:
You can test the ScreenSelection functionality by calling:
this.screenSelector.setAutoEnable(true);this.screenSelector.setAutoDisable(true);in the ScreenSelection example.