SpinnerHelper -> kt
This commit is contained in:
Milos Kozak
parent
009b3467a5
commit
5906c5f0fa
2 changed files with 152 additions and 150 deletions
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@ -1,150 +0,0 @@
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package info.nightscout.androidaps.utils.ui;
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import android.view.MotionEvent;
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import android.view.View;
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import android.widget.AdapterView;
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import android.widget.AdapterView.OnItemSelectedListener;
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import android.widget.Spinner;
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import android.widget.SpinnerAdapter;
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/**
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* Spinner Helper class that works around some common issues
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* with the stock Android Spinner
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*
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* A Spinner will normally call it's OnItemSelectedListener
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* when you use setSelection(...) in your initialization code.
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* This is usually unwanted behavior, and a common work-around
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* is to use spinner.post(...) with a Runnable to assign the
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* OnItemSelectedListener after layout.
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*
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* If you do not call setSelection(...) manually, the callback
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* may be called with the first item in the adapter you have
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* set. The common work-around for that is to count callbacks.
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*
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* While these workarounds usually *seem* to work, the callback
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* may still be called repeatedly for other reasons while the
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* selection hasn't actually changed. This will happen for
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* example, if the user has accessibility options enabled -
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* which is more common than you might think as several apps
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* use this for different purposes, like detecting which
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* notifications are active.
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*
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* Ideally, your OnItemSelectedListener callback should be
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* coded defensively so that no problem would occur even
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* if the callback was called repeatedly with the same values
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* without any user interaction, so no workarounds are needed.
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*
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* This class does that for you. It keeps track of the values
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* you have set with the setSelection(...) methods, and
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* proxies the OnItemSelectedListener callback so your callback
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* only gets called if the selected item's position differs
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* from the one you have set by code, or the first item if you
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* did not set it.
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*
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* This also means that if the user actually clicks the item
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* that was previously selected by code (or the first item
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* if you didn't set a selection by code), the callback will
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* not fire.
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*
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* To implement, replace current occurrences of:
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*
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* Spinner spinner =
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* (Spinner)findViewById(R.id.xxx);
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*
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* with:
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*
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* SpinnerHelper spinner =
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* new SpinnerHelper(findViewById(R.id.xxx))
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*
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* SpinnerHelper proxies the (my) most used calls to Spinner
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* but not all of them. Should a method not be available, use:
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*
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* spinner.getSpinner().someMethod(...)
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*
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* Or just add the proxy method yourself :)
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*
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* (Quickly) Tested on devices from 2.3.6 through 4.2.2
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*
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* @author Jorrit "Chainfire" Jongma
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* @license WTFPL (do whatever you want with this, nobody cares)
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*/
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public class SpinnerHelper implements OnItemSelectedListener {
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private final Spinner spinner;
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private boolean userTouched;
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private int lastPosition = -1;
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private OnItemSelectedListener proxiedItemSelectedListener = null;
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public SpinnerHelper(Object spinner) {
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this.spinner = (spinner != null) ? (Spinner)spinner : null;
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}
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public Spinner getSpinner() {
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return spinner;
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}
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public void setSelection(int position) {
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lastPosition = Math.max(-1, position);
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spinner.setSelection(position);
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}
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public void setSelection(int position, boolean animate) {
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lastPosition = Math.max(-1, position);
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spinner.setSelection(position, animate);
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}
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public void setOnItemSelectedListener(OnItemSelectedListener listener) {
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proxiedItemSelectedListener = listener;
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setTouchListener();
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spinner.setOnItemSelectedListener(listener == null ? null : this);
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}
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public void setTouchListener() {
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spinner.setOnTouchListener(new View.OnTouchListener() {
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@Override
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public boolean onTouch(View v, MotionEvent event) {
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userTouched = true;
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return false;
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}
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});
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}
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public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
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if (position != lastPosition && userTouched) {
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lastPosition = position;
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if (proxiedItemSelectedListener != null) {
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proxiedItemSelectedListener.onItemSelected(
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parent, view, position, id
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);
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}
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}
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}
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public void onNothingSelected(AdapterView<?> parent) {
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if (-1 != lastPosition) {
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lastPosition = -1;
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if (proxiedItemSelectedListener != null) {
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proxiedItemSelectedListener.onNothingSelected(
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parent
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);
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}
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}
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}
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public void setAdapter(SpinnerAdapter adapter) {
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if (adapter.getCount() > 0) {
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lastPosition = 0;
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}
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spinner.setAdapter(adapter);
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}
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public SpinnerAdapter getAdapter() { return spinner.getAdapter(); }
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public int getCount() { return spinner.getCount(); }
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public Object getItemAtPosition(int position) { return spinner.getItemAtPosition(position); }
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public long getItemIdAtPosition(int position) { return spinner.getItemIdAtPosition(position); }
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public Object getSelectedItem() { return spinner.getSelectedItem(); }
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public long getSelectedItemId() { return spinner.getSelectedItemId(); }
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public int getSelectedItemPosition() { return spinner.getSelectedItemPosition(); }
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public void setEnabled(boolean enabled) { spinner.setEnabled(enabled); }
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public boolean isEnabled() { return spinner.isEnabled(); }
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}
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@ -0,0 +1,152 @@
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@file:Suppress("SpellCheckingInspection")
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package info.nightscout.androidaps.utils.ui
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import android.view.MotionEvent
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import android.view.View
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import android.widget.AdapterView
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import android.widget.Spinner
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import android.widget.SpinnerAdapter
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import kotlin.math.max
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/**
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* Spinner Helper class that works around some common issues
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* with the stock Android Spinner
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*
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* A Spinner will normally call it's OnItemSelectedListener
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* when you use setSelection(...) in your initialization code.
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* This is usually unwanted behavior, and a common work-around
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* is to use spinner.post(...) with a Runnable to assign the
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* OnItemSelectedListener after layout.
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*
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* If you do not call setSelection(...) manually, the callback
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* may be called with the first item in the adapter you have
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* set. The common work-around for that is to count callbacks.
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*
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* While these workarounds usually *seem* to work, the callback
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* may still be called repeatedly for other reasons while the
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* selection hasn't actually changed. This will happen for
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* example, if the user has accessibility options enabled -
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* which is more common than you might think as several apps
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* use this for different purposes, like detecting which
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* notifications are active.
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*
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* Ideally, your OnItemSelectedListener callback should be
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* coded defensively so that no problem would occur even
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* if the callback was called repeatedly with the same values
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* without any user interaction, so no workarounds are needed.
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*
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* This class does that for you. It keeps track of the values
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* you have set with the setSelection(...) methods, and
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* proxies the OnItemSelectedListener callback so your callback
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* only gets called if the selected item's position differs
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* from the one you have set by code, or the first item if you
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* did not set it.
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*
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* This also means that if the user actually clicks the item
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* that was previously selected by code (or the first item
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* if you didn't set a selection by code), the callback will
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* not fire.
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*
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* To implement, replace current occurrences of:
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*
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* Spinner spinner =
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* (Spinner)findViewById(R.id.xxx);
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*
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* with:
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*
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* SpinnerHelper spinner =
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* new SpinnerHelper(findViewById(R.id.xxx))
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*
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* SpinnerHelper proxies the (my) most used calls to Spinner
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* but not all of them. Should a method not be available, use:
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*
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* spinner.getSpinner().someMethod(...)
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*
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* Or just add the proxy method yourself :)
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*
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* (Quickly) Tested on devices from 2.3.6 through 4.2.2
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*
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* @author Jorrit "Chainfire" Jongma
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* @license WTFPL (do whatever you want with this, nobody cares)
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*/
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@Suppress("unused")
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class SpinnerHelper(val spinner: Spinner) : AdapterView.OnItemSelectedListener {
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private var userTouched = false
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private var lastPosition = -1
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private var proxiedItemSelectedListener: AdapterView.OnItemSelectedListener? = null
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fun setSelection(position: Int) {
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lastPosition = max(-1, position)
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spinner.setSelection(position)
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}
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fun setSelection(position: Int, animate: Boolean) {
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lastPosition = max(-1, position)
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spinner.setSelection(position, animate)
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}
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fun setOnItemSelectedListener(listener: AdapterView.OnItemSelectedListener?) {
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proxiedItemSelectedListener = listener
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setTouchListener()
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spinner.onItemSelectedListener = if (listener == null) null else this
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}
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private fun setTouchListener() {
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spinner.setOnTouchListener { v: View, _: MotionEvent? ->
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v.performClick()
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userTouched = true
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false
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}
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}
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override fun onItemSelected(parent: AdapterView<*>?, view: View, position: Int, id: Long) {
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if (position != lastPosition && userTouched) {
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lastPosition = position
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if (proxiedItemSelectedListener != null) {
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proxiedItemSelectedListener!!.onItemSelected(
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parent, view, position, id
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)
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}
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}
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}
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override fun onNothingSelected(parent: AdapterView<*>?) {
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if (-1 != lastPosition) {
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lastPosition = -1
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if (proxiedItemSelectedListener != null) {
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proxiedItemSelectedListener!!.onNothingSelected(
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parent
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)
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}
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}
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}
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var adapter: SpinnerAdapter
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get() = spinner.adapter
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set(adapter) {
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if (adapter.count > 0) {
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lastPosition = 0
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}
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spinner.adapter = adapter
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}
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val count: Int
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get() = spinner.count
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fun getItemAtPosition(position: Int): Any = spinner.getItemAtPosition(position)
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fun getItemIdAtPosition(position: Int): Long = spinner.getItemIdAtPosition(position)
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val selectedItem: Any
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get() = spinner.selectedItem
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val selectedItemId: Long
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get() = spinner.selectedItemId
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val selectedItemPosition: Int
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get() = spinner.selectedItemPosition
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var isEnabled: Boolean
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get() = spinner.isEnabled
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set(enabled) {
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spinner.isEnabled = enabled
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}
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}
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