fix(cdk/drag-drop): don't disable native dragging on inactive handles #20991
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Currently we disable native drag interactions on handles once when they're registered, however this can block scrolling on mobile devices if the handle is inactive (either it is disabled or the drag element is disabled). These changes toggle the state dynamically depending on the active state. Fixes angular#20974.
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| this._disabledHandles.delete(handle); | ||
| if (this._disabledHandles.has(handle)) { | ||
| this._disabledHandles.delete(handle); | ||
| toggleNativeDragInteractions(handle, this.disabled); |
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should this say false instead of this.disabled?
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No, the handle should stay disabled if it is enabled while the drag item is disabled.
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Then should it also use this.disabled in disableHandle? seems odd that the methods aren't mirrored
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No since disableHandle only disables the handle, not the entire draggable item. A handle is considered "inactive" if either it is disabled or the item is disabled. This might be slightly confusing since toggleNativeDragInteractions(true) means that interactions should be enabled which is true when dragging is disabled.
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Ok I think I understand it, just a little confusing at first sight
| this._disabledHandles.delete(handle); | ||
| if (this._disabledHandles.has(handle)) { | ||
| this._disabledHandles.delete(handle); | ||
| toggleNativeDragInteractions(handle, this.disabled); |
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Ok I think I understand it, just a little confusing at first sight
…#20991) Currently we disable native drag interactions on handles once when they're registered, however this can block scrolling on mobile devices if the handle is inactive (either it is disabled or the drag element is disabled). These changes toggle the state dynamically depending on the active state. Fixes #20974. (cherry picked from commit f133210)
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Currently we disable native drag interactions on handles once when they're registered, however this can block scrolling on mobile devices if the handle is inactive (either it is disabled or the drag element is disabled).
These changes toggle the state dynamically depending on the active state.
Fixes #20974.