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POTransfer scroll event from sliding view to ScrollView - Sliding panel with ScrollView like Google Maps
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  1. POTransfer scroll event from sliding view to ScrollView - Sliding panel with ScrollView like Google Maps
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    copied!<p>So I'm using the <a href="https://github.com/umano/AndroidSlidingUpPanel" rel="nofollow noreferrer">Sliding Up Panel Library</a> in my application, and I'm trying to implement a <code>ScrollView</code> inside the sliding panel. Since both the sliding panel and the ScrollView are controlled by vertical scrolls, this is causing me some issues.</p> <p>I've partially got it to work by switching the panel's dragview once the panel has been slid all the way up, and when the ScrollView has been scrolled to the top. </p> <p><img src="https://i.stack.imgur.com/4SGnv.jpg" alt="enter image description here"></p> <p>The problem I'm facing now is that, when scrolling the panel to top the scrolling doesn't transfer to the ScrollView, like it does in Google Maps. <strong>Little hard to explain, so look at the video here:</strong> <a href="http://www.youtube.com/watch?v=9MUsmQzusX8&amp;feature=youtu.be" rel="nofollow noreferrer"><strong><em>www.youtube.com/watch?v=9MUsmQzusX8&amp;feature=youtu.be</em></strong></a> </p> <p>This is the panel slide listener:</p> <pre><code>... slidePanel.setEnableDragViewTouchEvents(true); slidePanel.setPanelSlideListener(new SlidingUpPanelLayout.PanelSlideListener() { @Override public void onPanelSlide(View panel, float slideOffset) { // Change the dragview to panelheader when panel is fully expanded // I'm doing this here instead of in onPanelExpanded, // because onPanelExpanded first gets called once scroll // is released. if (slideOffset &lt;= 0) { slidePanel.setDragView(layoutPanelTop); } // If the panel is not fully expanded set the whole // panel as dragview else if(slideOffset &gt; 0) { slidePanel.setDragView(layoutPanel); } } } @Override public void onPanelExpanded(View panel) { // layout.setDragView(layoutPanelTop); panelCollapsed = false; panelExpanded = true; panelAnchored = false; Log.v("TAG, "panelExpanded"); } @Override public void onPanelCollapsed(View panel) { slidePanel.setDragView(layoutPanel); panelCollapsed = true; panelExpanded = false; panelAnchored = false; Log.v(TAG, "panelCollapsed"); } @Override public void onPanelAnchored(View panel) { slidePanel.setDragView(layoutPanel); panelCollapsed = false; panelExpanded = false; panelAnchored = true; Log.v(TAG, "panelAnchored"); } }); </code></pre> <p>And I have managed to create a fully working scrollview listener by extending scrollview, which can detect scroll direction and onDown and onUp motion events:</p> <pre><code>private boolean atScrollViewTop = false; @Override public void onScrollChanged(int scrollY) { scrollY = Math.min(mMaxScrollY, scrollY); if (scrollY &lt;= 0) { Log.v("myTag", "You at scrollview top"); atScrollViewTop = true; } else { atScrollViewTop = false; } mScrollSettleHandler.onScroll(scrollY); switch (mState) { case STATE_SCROLL_UP: if (panelExpanded &amp;&amp; atScrollViewTop) { slidePanel.setDragView(layoutPanel); } else { slidePanel.setDragView(layoutPanelTop); } Log.v("myTag", "scrolling up"); break; case STATE_SCROLL_DOWN: slidePanel.setDragView(layoutPanelTop); Log.v("myTag", "scrolling down"); break; } } @Override public void onDownMotionEvent() { } @Override public void onUpOrCancelMotionEvent() { } </code></pre> <p>I've been struggling with this the last two days.. So really hope on some pointer at least. Thanks very much in advance. Regards Jakob Harteg.</p>
 

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