package org.fox.ttrss; // http://www.techques.com/question/1-9718245/Webview-in-Scrollview import android.content.Context; import android.graphics.Canvas; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View; import android.webkit.WebView; public class TitleWebView extends WebView{ public TitleWebView(Context context, AttributeSet attrs){ super(context, attrs); } private int titleHeight; @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){ super.onMeasure(widthMeasureSpec, heightMeasureSpec); // determine height of title bar View title = getChildAt(0); titleHeight = title==null ? 0 : title.getMeasuredHeight(); } @Override public boolean onInterceptTouchEvent(MotionEvent ev){ return true; // don't pass our touch events to children (title bar), we send these in dispatchTouchEvent } private boolean touchInTitleBar; @Override public boolean dispatchTouchEvent(MotionEvent me){ boolean wasInTitle = false; switch(me.getActionMasked()){ case MotionEvent.ACTION_DOWN: touchInTitleBar = (me.getY() <= visibleTitleHeight()); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: wasInTitle = touchInTitleBar; touchInTitleBar = false; break; } if(touchInTitleBar || wasInTitle) { View title = getChildAt(0); if(title!=null) { // this touch belongs to title bar, dispatch it here me.offsetLocation(0, getScrollY()); return title.dispatchTouchEvent(me); } } // this is our touch, offset and process me.offsetLocation(0, -titleHeight); return super.dispatchTouchEvent(me); } /** * @return visible height of title (may return negative values) */ private int visibleTitleHeight(){ return titleHeight-getScrollY(); } @Override protected void onScrollChanged(int l, int t, int oldl, int oldt){ super.onScrollChanged(l, t, oldl, oldt); View title = getChildAt(0); if(title!=null) // undo horizontal scroll, so that title scrolls only vertically title.offsetLeftAndRight(l - title.getLeft()); } @Override protected void onDraw(Canvas c){ c.save(); int tH = visibleTitleHeight(); if(tH>0) { // clip so that it doesn't clear background under title bar int sx = getScrollX(), sy = getScrollY(); c.clipRect(sx, sy+tH, sx+getWidth(), sy+getHeight()); } c.translate(0, titleHeight); super.onDraw(c); c.restore(); } }