[Catalyst] Add MainSwitchBar.PreChangeListener (daea3b48) · Commits · e / os / android_frameworks_base

packages/SettingsLib/MainSwitchPreference/src/com/android/settingslib/widget/MainSwitchBar.java

+27 −2

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@ import android.widget.LinearLayout;
		import android.widget.TextView;

		import androidx.annotation.ColorInt;
		import androidx.annotation.Nullable;
		import androidx.annotation.RequiresApi;

		import com.android.settingslib.widget.mainswitch.R;
		@@ -42,7 +43,7 @@ import java.util.List;
		/**
		* MainSwitchBar is a View with a customized Switch.
		* This component is used as the main switch of the page
		* to enable or disable the prefereces on the page.
		* to enable or disable the preferences on the page.
		*/
		public class MainSwitchBar extends LinearLayout implements OnCheckedChangeListener {

		@@ -58,6 +59,8 @@ public class MainSwitchBar extends LinearLayout implements OnCheckedChangeListen
		protected CompoundButton mSwitch;
		private final View mFrameView;

		private @Nullable PreChangeListener mPreChangeListener;

		public MainSwitchBar(Context context) {
		this(context, null);
		}
		@@ -138,10 +141,20 @@ public class MainSwitchBar extends LinearLayout implements OnCheckedChangeListen

		@Override
		public boolean performClick() {
		if (callPreChangeListener()) {
		mSwitch.performClick();
		}
		return super.performClick();
		}

		protected boolean callPreChangeListener() {
		return mPreChangeListener == null \|\| mPreChangeListener.preChange(!mSwitch.isChecked());
		}

		public void setPreChangeListener(@Nullable PreChangeListener preChangeListener) {
		mPreChangeListener = preChangeListener;
		}

		/**
		* Update the switch status
		*/
		@@ -341,4 +354,16 @@ public class MainSwitchBar extends LinearLayout implements OnCheckedChangeListen

		requestLayout();
		}

		/**
		* Listener callback before switch is toggled.
		*/
		public interface PreChangeListener {
		/**
		* Returns if the new value can be set.
		*
		* When false is return, the switch toggle is not triggered at all.
		*/
		boolean preChange(boolean isCheck);
		}
		}