From f5da63f9882e1807c6bd2adb5205ad7482c45339 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Sch=C3=BCrmann?= <dominik@dominikschuermann.de>
Date: Thu, 2 Jan 2014 21:10:08 +0100
Subject: New list with sticky list headers library

---
 .../stickylistheaders/WrapperView.java             | 150 +++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 libraries/StickyListHeaders/library/src/se/emilsjolander/stickylistheaders/WrapperView.java

(limited to 'libraries/StickyListHeaders/library/src/se/emilsjolander/stickylistheaders/WrapperView.java')

diff --git a/libraries/StickyListHeaders/library/src/se/emilsjolander/stickylistheaders/WrapperView.java b/libraries/StickyListHeaders/library/src/se/emilsjolander/stickylistheaders/WrapperView.java
new file mode 100644
index 000000000..f51416c1c
--- /dev/null
+++ b/libraries/StickyListHeaders/library/src/se/emilsjolander/stickylistheaders/WrapperView.java
@@ -0,0 +1,150 @@
+package se.emilsjolander.stickylistheaders;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+
+/**
+ * 
+ * the view that wrapps a divider header and a normal list item. The listview sees this as 1 item
+ * 
+ * @author Emil Sjölander
+ */
+public class WrapperView extends ViewGroup {
+
+	View mItem;
+	Drawable mDivider;
+	int mDividerHeight;
+	View mHeader;
+	int mItemTop;
+
+	WrapperView(Context c) {
+		super(c);
+	}
+
+	public boolean hasHeader() {
+		return mHeader != null;
+	}
+	
+	public View getItem() {
+		return mItem;
+	}
+	
+	public View getHeader() {
+		return mHeader;
+	}
+
+	void update(View item, View header, Drawable divider, int dividerHeight) {
+		
+		//every wrapperview must have a list item
+		if (item == null) {
+			throw new NullPointerException("List view item must not be null.");
+		}
+
+		//only remove the current item if it is not the same as the new item. this can happen if wrapping a recycled view
+		if (this.mItem != item) {
+			removeView(this.mItem);
+			this.mItem = item;
+			final ViewParent parent = item.getParent();
+			if(parent != null && parent != this) {
+				if(parent instanceof ViewGroup) {
+					((ViewGroup) parent).removeView(item);
+				}
+			}
+			addView(item);
+		}
+
+		//same logik as above but for the header
+		if (this.mHeader != header) {
+			if (this.mHeader != null) {
+				removeView(this.mHeader);
+			}
+			this.mHeader = header;
+			if (header != null) {
+				addView(header);
+			}
+		}
+
+		if (this.mDivider != divider) {
+			this.mDivider = divider;
+			this.mDividerHeight = dividerHeight;
+			invalidate();
+		}
+	}
+
+	@Override
+	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+		int measuredWidth = MeasureSpec.getSize(widthMeasureSpec);
+		int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(measuredWidth,
+				MeasureSpec.EXACTLY);
+		int measuredHeight = 0;
+		
+		//measure header or divider. when there is a header visible it acts as the divider
+		if (mHeader != null) {
+			ViewGroup.LayoutParams params = mHeader.getLayoutParams();
+			if (params != null && params.height > 0) {
+				mHeader.measure(childWidthMeasureSpec,
+						MeasureSpec.makeMeasureSpec(params.height, MeasureSpec.EXACTLY));
+			} else {
+				mHeader.measure(childWidthMeasureSpec,
+						MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
+			}
+			measuredHeight += mHeader.getMeasuredHeight();
+		} else if (mDivider != null) {
+			measuredHeight += mDividerHeight;
+		}
+		
+		//measure item
+		ViewGroup.LayoutParams params = mItem.getLayoutParams();
+		if (params != null && params.height > 0) {
+			mItem.measure(childWidthMeasureSpec,
+					MeasureSpec.makeMeasureSpec(params.height, MeasureSpec.EXACTLY));
+		} else {
+			mItem.measure(childWidthMeasureSpec,
+					MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
+		}
+		measuredHeight += mItem.getMeasuredHeight();
+
+		setMeasuredDimension(measuredWidth, measuredHeight);
+	}
+
+	@Override
+	protected void onLayout(boolean changed, int l, int t, int r, int b) {
+
+		l = 0;
+		t = 0;
+		r = getWidth();
+		b = getHeight();
+
+		if (mHeader != null) {
+			int headerHeight = mHeader.getMeasuredHeight();
+			mHeader.layout(l, t, r, headerHeight);
+			mItemTop = headerHeight;
+			mItem.layout(l, headerHeight, r, b);
+		} else if (mDivider != null) {
+			mDivider.setBounds(l, t, r, mDividerHeight);
+			mItemTop = mDividerHeight;
+			mItem.layout(l, mDividerHeight, r, b);
+		} else {
+			mItemTop = t;
+			mItem.layout(l, t, r, b);
+		}
+	}
+
+	@Override
+	protected void dispatchDraw(Canvas canvas) {
+		super.dispatchDraw(canvas);
+		if (mHeader == null && mDivider != null) {
+			// Drawable.setBounds() does not seem to work pre-honeycomb. So have
+			// to do this instead
+			if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) {
+				canvas.clipRect(0, 0, getWidth(), mDividerHeight);
+			}
+			mDivider.draw(canvas);
+		}
+	}
+}
-- 
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