diff options
Diffstat (limited to 'src/com/android/launcher3/InsettableLinearLayout.java')
-rw-r--r-- | src/com/android/launcher3/InsettableLinearLayout.java | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/com/android/launcher3/InsettableLinearLayout.java b/src/com/android/launcher3/InsettableLinearLayout.java new file mode 100644 index 000000000..c48c088cc --- /dev/null +++ b/src/com/android/launcher3/InsettableLinearLayout.java @@ -0,0 +1,106 @@ +package com.android.launcher3; + +import android.content.Context; +import android.content.res.TypedArray; +import android.graphics.Rect; +import android.util.AttributeSet; +import android.view.View; +import android.view.ViewGroup; +import android.widget.LinearLayout; + +public class InsettableLinearLayout extends LinearLayout implements + ViewGroup.OnHierarchyChangeListener, Insettable { + + protected Rect mInsets = new Rect(); + + public InsettableLinearLayout(Context context, AttributeSet attrs) { + super(context, attrs); + setOnHierarchyChangeListener(this); + } + + public void setLinearLayoutChildInsets(View child, Rect newInsets, Rect oldInsets) { + final LayoutParams lp = (LayoutParams) child.getLayoutParams(); + + if (child instanceof Insettable) { + ((Insettable) child).setInsets(newInsets); + } else if (!lp.ignoreInsets) { + if (!lp.ignoreTopInsets) { + lp.topMargin += (newInsets.top - oldInsets.top); + } + lp.leftMargin += (newInsets.left - oldInsets.left); + lp.rightMargin += (newInsets.right - oldInsets.right); + if (!lp.ignoreBottomInsets) { + lp.bottomMargin += (newInsets.bottom - oldInsets.bottom); + } + } + child.setLayoutParams(lp); + } + + @Override + public void setInsets(Rect insets) { + final int n = getChildCount(); + for (int i = 0; i < n; i++) { + final View child = getChildAt(i); + setLinearLayoutChildInsets(child, insets, mInsets); + } + mInsets.set(insets); + } + + @Override + public LayoutParams generateLayoutParams(AttributeSet attrs) { + return new InsettableLinearLayout.LayoutParams(getContext(), attrs); + } + + @Override + protected LayoutParams generateDefaultLayoutParams() { + return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); + } + + // Override to allow type-checking of LayoutParams. + @Override + protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { + return p instanceof InsettableLinearLayout.LayoutParams; + } + + @Override + protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { + return new LayoutParams(p); + } + + public static class LayoutParams extends LinearLayout.LayoutParams { + boolean ignoreInsets = false; + boolean ignoreTopInsets = false; + boolean ignoreBottomInsets = false; + + public LayoutParams(Context c, AttributeSet attrs) { + super(c, attrs); + TypedArray a = c.obtainStyledAttributes(attrs, + R.styleable.InsettableLinearLayout_Layout); + ignoreInsets = a.getBoolean( + R.styleable.InsettableLinearLayout_Layout_layout_ignoreInsets, false); + ignoreTopInsets = a.getBoolean( + R.styleable.InsettableLinearLayout_Layout_layout_ignoreTopInsets, false); + ignoreBottomInsets = a.getBoolean( + R.styleable.InsettableLinearLayout_Layout_layout_ignoreBottomInsets, false); + a.recycle(); + } + + public LayoutParams(int width, int height) { + super(width, height); + } + + public LayoutParams(ViewGroup.LayoutParams lp) { + super(lp); + } + } + + @Override + public void onChildViewAdded(View parent, View child) { + setLinearLayoutChildInsets(child, mInsets, new Rect()); + } + + @Override + public void onChildViewRemoved(View parent, View child) { + } + +} |