BackPressBehavior enum
This decides the action to be taken when user presses the back button.
Note that this will continue to work, even if the panel is not currently visible. (i.e., PanelState.closed with height 0.0).
For normal panels, any of these can be used. But for Two-state panels, these behaviors can be used: POP, PERSIST, CLOSE_POP, CLOSE_PERSIST.
Default : POP
Constructors
- BackPressBehavior()
-
const
Values
- POP → const BackPressBehavior
-
Just pop the route without considering the panel state.
Also valid for two-state panels.
This is the default behavior.
- PERSIST → const BackPressBehavior
-
Never pop the route no matter what the panel state is. To pop the route you need to change this yourself to another behavior. (e.g., POP).
Also valid for two-state panels.
Useful in cases when the user must interact with the panel only.
- COLLAPSE_PERSIST → const BackPressBehavior
-
If the panel's height is more than PanelSize.collapsedHeight, the panel will collapse.
After collapsed, if the user taps back button again, the behavior would be PERSIST. i.e., route will not pop.
If this is provided for two-state panels, PERSIST is applied instead.
- COLLAPSE_POP → const BackPressBehavior
-
If the panel's height is more than PanelSize.collapsedHeight, the panel will collapse.
After collapsed, if the user taps back button again, the behavior would be POP. i.e., route will pop.
If this is provided for two-state panels, POP is applied instead.
- CLOSE_PERSIST → const BackPressBehavior
-
If the panel's height is more than PanelSize.closedHeight, the panel will close.
After closed, if the user taps back button again, the behavior would be PERSIST. i.e., route will not pop.
- CLOSE_POP → const BackPressBehavior
-
If the panel's height is more than PanelSize.closedHeight, the panel will close.
After closed, if the user taps back button again, the behavior would be POP. i.e., route will pop.
Also valid for two-state panels.
- COLLAPSE_CLOSE_PERSIST → const BackPressBehavior
-
If the panel's height is more than PanelSize.collapsedHeight, the panel will collapse. Again, if the panel's height is more than PanelSize.closedHeight, and less than or equal to PanelSize.collapsedHeight, the panel will close.
After closed, if the user taps back button again, the behavior would be PERSIST. i.e., route will not pop.
If this is provided for two-state panels, CLOSE_PERSIST is applied instead.
- COLLAPSE_CLOSE_POP → const BackPressBehavior
-
If the panel's height is more than PanelSize.collapsedHeight, the panel will collapse. Again, if the panel's height is more than PanelSize.closedHeight, and less than or equal to PanelSize.collapsedHeight, the panel will close.
After closed, if the user taps back button again, the behavior would be POP. i.e., route will pop.
If this is provided for two-state panels, CLOSE_POP is applied instead.
Properties
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Constants
-
values
→ const List<
BackPressBehavior> - A constant List of the values in this enum, in order of their declaration.