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+ Vertical scroll mode
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142 changes: 142 additions & 0 deletions
142
app/src/main/java/com/dar/nclientv2/components/views/VerticalViewPager.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package com.dar.nclientv2.components.views; | ||
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| import android.content.Context; | ||
| import android.util.AttributeSet; | ||
| import android.view.GestureDetector; | ||
| import android.view.MotionEvent; | ||
| import android.view.View; | ||
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| import androidx.viewpager.widget.ViewPager; | ||
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| import com.dar.nclientv2.components.widgets.CustomViewPager; | ||
| import com.dar.nclientv2.utility.LogUtility; | ||
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| public class VerticalViewPager extends ViewPager { | ||
| private CustomViewPager.OnItemClickListener mOnItemClickListener; | ||
| private boolean verticalMode=true; | ||
| public VerticalViewPager(Context context) { | ||
| this(context, null); | ||
| init(); | ||
| } | ||
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| public VerticalViewPager(Context context, AttributeSet attrs) { | ||
| super(context, attrs); | ||
| init(); | ||
| } | ||
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| @Override | ||
| public boolean canScrollHorizontally(int direction) { | ||
| if(verticalMode) return false; | ||
| else return super.canScrollHorizontally(direction); | ||
| } | ||
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| public void setVerticalMode(boolean verticalMode) { | ||
| this.verticalMode = verticalMode; | ||
| init(); | ||
| } | ||
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| @Override | ||
| public boolean canScrollVertically(int direction) { | ||
| if(verticalMode) return super.canScrollHorizontally(direction); | ||
| else return super.canScrollVertically(direction); | ||
| } | ||
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| private void init() { | ||
| setPageTransformer(true,verticalMode?new VerticalPageTransformer():null); | ||
| setOverScrollMode(View.OVER_SCROLL_NEVER); | ||
| setup(); | ||
| } | ||
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| @Override | ||
| public boolean onInterceptTouchEvent(MotionEvent ev) { | ||
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| try { | ||
| final boolean toIntercept = super.onInterceptTouchEvent(flipXY(ev)); | ||
| flipXY(ev); | ||
| return toIntercept; | ||
| } catch (IllegalArgumentException ex) { | ||
| ex.printStackTrace(); | ||
| } | ||
| return false; | ||
| } | ||
| @Override | ||
| public boolean performClick() { | ||
| try { | ||
| return super.performClick(); | ||
| } catch (IllegalArgumentException ex) { | ||
| LogUtility.e(ex.getLocalizedMessage(),ex); | ||
| } | ||
| return false; | ||
| } | ||
| @Override | ||
| public boolean onTouchEvent(MotionEvent ev) { | ||
| try { | ||
| performClick(); | ||
| final boolean toHandle = super.onTouchEvent(flipXY(ev)); | ||
| flipXY(ev); | ||
| return toHandle; | ||
| } catch (IllegalArgumentException ex) { | ||
| LogUtility.e(ex.getLocalizedMessage(),ex); | ||
| } | ||
| return false; | ||
| } | ||
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| private MotionEvent flipXY(MotionEvent ev) { | ||
| if(!verticalMode)return ev; | ||
| final float width = getWidth(); | ||
| final float height = getHeight(); | ||
| final float x = (ev.getY() / height) * width; | ||
| final float y = (ev.getX() / width) * height; | ||
| ev.setLocation(x, y); | ||
| return ev; | ||
| } | ||
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| private static final class VerticalPageTransformer implements ViewPager.PageTransformer { | ||
| @Override | ||
| public void transformPage(View view, float position) { | ||
| final int pageWidth = view.getWidth(); | ||
| final int pageHeight = view.getHeight(); | ||
| if (position < -1) { | ||
| view.setAlpha(0); | ||
| } else if (position <= 1) { | ||
| view.setAlpha(1); | ||
| view.setTranslationX(pageWidth * -position); | ||
| float yPosition = position * pageHeight; | ||
| view.setTranslationY(yPosition); | ||
| } else { | ||
| view.setAlpha(0); | ||
| } | ||
| } | ||
| } | ||
|
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| private void setup() { | ||
| final GestureDetector tapGestureDetector = new GestureDetector(getContext(), new VerticalViewPager.TapGestureListener()); | ||
| setOnTouchListener((v, event) -> { | ||
| tapGestureDetector.onTouchEvent(event); | ||
| performClick(); | ||
| return false; | ||
| }); | ||
| } | ||
|
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| public void setOnItemClickListener(CustomViewPager.OnItemClickListener onItemClickListener) { | ||
| mOnItemClickListener = onItemClickListener; | ||
| } | ||
|
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| public interface OnItemClickListener { | ||
| void onItemClick(int position); | ||
| } | ||
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| private class TapGestureListener extends GestureDetector.SimpleOnGestureListener { | ||
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| @Override | ||
| public boolean onSingleTapConfirmed(MotionEvent e) { | ||
| if(mOnItemClickListener != null) { | ||
| mOnItemClickListener.onItemClick(getCurrentItem()); | ||
| } | ||
| return true; | ||
| } | ||
| } | ||
|
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||
|
|
||
| } |
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