[Android] Audio browser: define a new widget for the scrolling header
Adrien Maglo
git at videolan.org
Tue Nov 26 09:00:58 CET 2013
vlc-ports/android | branch: master | Adrien Maglo <magsoft at videolan.org> | Tue Nov 26 08:54:48 2013 +0100| [bbabe07b1f7baaa14aa90dbe4008fde5fc536623] | committer: Adrien Maglo
Audio browser: define a new widget for the scrolling header
> http://git.videolan.org/gitweb.cgi/vlc-ports/android.git/?a=commit;h=bbabe07b1f7baaa14aa90dbe4008fde5fc536623
---
.../org/videolan/vlc/widget/HeaderScrollView.java | 107 ++++++++++++++++++++
1 file changed, 107 insertions(+)
diff --git a/vlc-android/src/org/videolan/vlc/widget/HeaderScrollView.java b/vlc-android/src/org/videolan/vlc/widget/HeaderScrollView.java
new file mode 100644
index 0000000..253f711
--- /dev/null
+++ b/vlc-android/src/org/videolan/vlc/widget/HeaderScrollView.java
@@ -0,0 +1,107 @@
+/*****************************************************************************
+ * AudioBrowserActivity.java
+ *****************************************************************************
+ * Copyright © 2011-2013 VLC authors and VideoLAN
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+package org.videolan.vlc.widget;
+
+import org.videolan.vlc.R;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.HorizontalScrollView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+public class HeaderScrollView extends HorizontalScrollView {
+
+ private int mTabWidth;
+ private float mProgress = 0;
+ public final static int MODE_TOTAL = 4;
+
+ public HeaderScrollView(Context context, AttributeSet attrs) {
+ super(context, attrs);
+
+ addOnLayoutChangeListener(new OnLayoutChangeListener() {
+ @Override
+ public void onLayoutChange(View v, int left, int top, int right, int bottom,
+ int oldLeft, int oldTop, int oldRight, int oldBottom) {
+ restoreScroll();
+ }
+ });
+ }
+
+ @Override
+ protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+ super.onSizeChanged(w, h, oldw, oldh);
+
+ mTabWidth = w / 2;
+
+ post(new Runnable() {
+ @Override
+ public void run() {
+ LinearLayout hl = (LinearLayout) findViewById(R.id.header_layout);
+ for (int i = 0; i < hl.getChildCount(); ++i) {
+ View t = (View)hl.getChildAt(i);
+ LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(mTabWidth, LayoutParams.WRAP_CONTENT, 1);
+ if (i == 0)
+ lp.setMargins(mTabWidth / 2, 0, 0, 0);
+ else if (i == hl.getChildCount() - 1)
+ lp.setMargins(0, 0, mTabWidth / 2, 0);
+ t.setLayoutParams(lp);
+ }
+ requestLayout();
+ }
+ });
+ }
+
+ public void scroll(float progress) {
+ mProgress = progress;
+ restoreScroll();
+ }
+
+ private void restoreScroll() {
+ /*
+ * How progress works:
+ * |------|------|------|
+ * 0 1/3 2/3 1
+ *
+ * To calculate the "progress" of a particular tab, one can use this
+ * formula:
+ *
+ * <tab beginning with 0> * (1 / (total tabs - 1))
+ */
+ int x = (int) (mProgress * (MODE_TOTAL - 1) * mTabWidth);
+ smoothScrollTo(x, 0);
+ }
+
+ public void highlightTab(int existingPosition, int newPosition) {
+ LinearLayout hl = (LinearLayout) findViewById(R.id.header_layout);
+ TypedArray attrs = getContext().obtainStyledAttributes(new int[] { R.attr.font_light, R.attr.font_default});
+ if (hl == null)
+ return;
+ TextView oldView = (TextView) hl.getChildAt(existingPosition);
+ if (oldView != null)
+ oldView.setTextColor(attrs.getColor(0, 0));
+ TextView newView = (TextView) hl.getChildAt(newPosition);
+ if (newView != null)
+ newView.setTextColor(attrs.getColor(1, 0));
+ }
+}
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