1 files changed, 182 insertions, 0 deletions
diff --git a/src/com/viewpagerindicator/IcsLinearLayout.java b/src/com/viewpagerindicator/IcsLinearLayout.java
new file mode 100644
index 0000000..cbf619e
--- /dev/null
+++ b/src/com/viewpagerindicator/IcsLinearLayout.java
@@ -0,0 +1,182 @@
+package com.viewpagerindicator;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.view.View;
+import android.widget.LinearLayout;
+
+/**
+ * A simple extension of a regular linear layout that supports the divider API
+ * of Android 4.0+. The dividers are added adjacent to the children by changing
+ * their layout params. If you need to rely on the margins which fall in the
+ * same orientation as the layout you should wrap the child in a simple
+ * {@link android.widget.FrameLayout} so it can receive the margin.
+ */
+class IcsLinearLayout extends LinearLayout {
+    private static final int[] LL = new int[] {
+        /* 0 */ android.R.attr.divider,
+        /* 1 */ android.R.attr.showDividers,
+        /* 2 */ android.R.attr.dividerPadding,
+    };
+    private static final int LL_DIVIDER = 0;
+    private static final int LL_SHOW_DIVIDER = 1;
+    private static final int LL_DIVIDER_PADDING = 2;
+
+    private Drawable mDivider;
+    private int mDividerWidth;
+    private int mDividerHeight;
+    private int mShowDividers;
+    private int mDividerPadding;
+
+
+    public IcsLinearLayout(Context context, int themeAttr) {
+        super(context);
+
+        TypedArray a = context.obtainStyledAttributes(null, LL, themeAttr, 0);
+        setDividerDrawable(a.getDrawable(IcsLinearLayout.LL_DIVIDER));
+        mDividerPadding = a.getDimensionPixelSize(LL_DIVIDER_PADDING, 0);
+        mShowDividers = a.getInteger(LL_SHOW_DIVIDER, SHOW_DIVIDER_NONE);
+        a.recycle();
+    }
+
+    public void setDividerDrawable(Drawable divider) {
+        if (divider == mDivider) {
+            return;
+        }
+        mDivider = divider;
+        if (divider != null) {
+            mDividerWidth = divider.getIntrinsicWidth();
+            mDividerHeight = divider.getIntrinsicHeight();
+        } else {
+            mDividerWidth = 0;
+            mDividerHeight = 0;
+        }
+        setWillNotDraw(divider == null);
+        requestLayout();
+    }
+
+    @Override
+    protected void measureChildWithMargins(View child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed) {
+        final int index = indexOfChild(child);
+        final int orientation = getOrientation();
+        final LayoutParams params = (LayoutParams) child.getLayoutParams();
+        if (hasDividerBeforeChildAt(index)) {
+            if (orientation == VERTICAL) {
+                //Account for the divider by pushing everything up
+                params.topMargin = mDividerHeight;
+            } else {
+                //Account for the divider by pushing everything left
+                params.leftMargin = mDividerWidth;
+            }
+        }
+
+        final int count = getChildCount();
+        if (index == count - 1) {
+            if (hasDividerBeforeChildAt(count)) {
+                if (orientation == VERTICAL) {
+                    params.bottomMargin = mDividerHeight;
+                } else {
+                    params.rightMargin = mDividerWidth;
+                }
+            }
+        }
+        super.measureChildWithMargins(child, parentWidthMeasureSpec, widthUsed, parentHeightMeasureSpec, heightUsed);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (mDivider != null) {
+            if (getOrientation() == VERTICAL) {
+                drawDividersVertical(canvas);
+            } else {
+                drawDividersHorizontal(canvas);
+            }
+        }
+        super.onDraw(canvas);
+    }
+
+    private void drawDividersVertical(Canvas canvas) {
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+
+            if (child != null && child.getVisibility() != GONE) {
+                if (hasDividerBeforeChildAt(i)) {
+                    final android.widget.LinearLayout.LayoutParams lp = (android.widget.LinearLayout.LayoutParams) child.getLayoutParams();
+                    final int top = child.getTop() - lp.topMargin/* - mDividerHeight*/;
+                    drawHorizontalDivider(canvas, top);
+                }
+            }
+        }
+
+        if (hasDividerBeforeChildAt(count)) {
+            final View child = getChildAt(count - 1);
+            int bottom = 0;
+            if (child == null) {
+                bottom = getHeight() - getPaddingBottom() - mDividerHeight;
+            } else {
+                //final LayoutParams lp = (LayoutParams) child.getLayoutParams();
+                bottom = child.getBottom()/* + lp.bottomMargin*/;
+            }
+            drawHorizontalDivider(canvas, bottom);
+        }
+    }
+
+    private void drawDividersHorizontal(Canvas canvas) {
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+
+            if (child != null && child.getVisibility() != GONE) {
+                if (hasDividerBeforeChildAt(i)) {
+                    final android.widget.LinearLayout.LayoutParams lp = (android.widget.LinearLayout.LayoutParams) child.getLayoutParams();
+                    final int left = child.getLeft() - lp.leftMargin/* - mDividerWidth*/;
+                    drawVerticalDivider(canvas, left);
+                }
+            }
+        }
+
+        if (hasDividerBeforeChildAt(count)) {
+            final View child = getChildAt(count - 1);
+            int right = 0;
+            if (child == null) {
+                right = getWidth() - getPaddingRight() - mDividerWidth;
+            } else {
+                //final LayoutParams lp = (LayoutParams) child.getLayoutParams();
+                right = child.getRight()/* + lp.rightMargin*/;
+            }
+            drawVerticalDivider(canvas, right);
+        }
+    }
+
+    private void drawHorizontalDivider(Canvas canvas, int top) {
+        mDivider.setBounds(getPaddingLeft() + mDividerPadding, top,
+                getWidth() - getPaddingRight() - mDividerPadding, top + mDividerHeight);
+        mDivider.draw(canvas);
+    }
+
+    private void drawVerticalDivider(Canvas canvas, int left) {
+        mDivider.setBounds(left, getPaddingTop() + mDividerPadding,
+                left + mDividerWidth, getHeight() - getPaddingBottom() - mDividerPadding);
+        mDivider.draw(canvas);
+    }
+
+    private boolean hasDividerBeforeChildAt(int childIndex) {
+        if (childIndex == 0 || childIndex == getChildCount()) {
+          return false;
+        }
+        if ((mShowDividers & SHOW_DIVIDER_MIDDLE) != 0) {
+            boolean hasVisibleViewBefore = false;
+            for (int i = childIndex - 1; i >= 0; i--) {
+                if (getChildAt(i).getVisibility() != GONE) {
+                    hasVisibleViewBefore = true;
+                    break;
+                }
+            }
+            return hasVisibleViewBefore;
+        }
+        return false;
+    }
+}