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/*
* Copyright (c) 2012-2018 Arne Schwabe
* Distributed under the GNU GPL v2 with additional terms. For full terms see the file doc/LICENSE.txt
*/
package de.blinkt.openvpn.views;
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RadioGroup;
import java.util.HashMap;
import java.util.Map;
public class MultiLineRadioGroup extends RadioGroup {
private Map<View, Rect> viewRectMap;
public MultiLineRadioGroup(Context context) {
this(context, null);
}
public MultiLineRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
viewRectMap = new HashMap<View, Rect>();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
int widthMeasurement = MeasureSpec.getSize(widthMeasureSpec);
int heightMeasurement = MeasureSpec.getSize(heightMeasureSpec);
switch (getOrientation()){
case HORIZONTAL:
heightMeasurement = findHorizontalHeight(widthMeasureSpec, heightMeasureSpec);
break;
case VERTICAL:
widthMeasurement = findVerticalWidth(widthMeasureSpec, heightMeasureSpec);
break;
}
setMeasuredDimension(widthMeasurement, heightMeasurement);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
int count = getChildCount();
for(int x=0; x < count; ++x) {
View button = getChildAt(x);
Rect dims = viewRectMap.get(button);
button.layout(dims.left, dims.top, dims.right, dims.bottom);
}
}
private int findHorizontalHeight(int widthMeasureSpec, int heightMeasureSpec){
int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
int maxRight = MeasureSpec.getSize(widthMeasureSpec) - getPaddingRight();
// create MeasureSpecs to accommodate max space that RadioButtons can occupy
int newWidthMeasureSpec = MeasureSpec.makeMeasureSpec(maxRight - getPaddingLeft(),
MeasureSpec.getMode(widthMeasureSpec));
int newHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
parentHeight - (getPaddingTop() + getPaddingBottom()),
MeasureSpec.getMode(heightMeasureSpec));
int nextLeft = getPaddingLeft();
int nextTop = getPaddingTop();
int maxRowHeight = 0;
viewRectMap.clear();
// measure and find placement for each RadioButton (results to be used in onLayout() stage)
int count = getChildCount();
for(int x=0; x < count; ++x){
View button = getChildAt(x);
measureChild(button, newWidthMeasureSpec, newHeightMeasureSpec);
maxRowHeight = Math.max(maxRowHeight, button.getMeasuredHeight());
// determine RadioButton placement
int nextRight = nextLeft + button.getMeasuredWidth();
if(nextRight > maxRight){ // if current button will exceed border on this row ...
// ... move to next row
nextLeft = getPaddingLeft();
nextTop += maxRowHeight;
// adjust for next row values
nextRight = nextLeft + button.getMeasuredWidth();
maxRowHeight = button.getMeasuredHeight();
}
int nextBottom = nextTop + button.getMeasuredHeight();
viewRectMap.put(button, new Rect(nextLeft, nextTop, nextRight, nextBottom));
// update nextLeft
nextLeft = nextRight;
}
// height of RadioGroup is a natural by-product of placing all the children
int idealHeight = nextTop + maxRowHeight + getPaddingBottom();
switch(MeasureSpec.getMode(heightMeasureSpec)){
case MeasureSpec.UNSPECIFIED:
return idealHeight;
case MeasureSpec.AT_MOST:
return Math.min(idealHeight, parentHeight);
case MeasureSpec.EXACTLY:
default:
return parentHeight;
}
}
private int findVerticalWidth(int widthMeasureSpec, int heightMeasureSpec){
int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
int maxBottom = MeasureSpec.getSize(heightMeasureSpec) - getPaddingBottom();
// create MeasureSpecs to accommodate max space that RadioButtons can occupy
int newWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
parentWidth - (getPaddingLeft() + getPaddingRight()),
MeasureSpec.getMode(widthMeasureSpec));
int newHeightMeasureSpec = MeasureSpec.makeMeasureSpec(maxBottom - getPaddingTop(),
MeasureSpec.getMode(heightMeasureSpec));
int nextTop = getPaddingTop();
int nextLeft = getPaddingLeft();
int maxColWidth = 0;
viewRectMap.clear();
// measure and find placement for each RadioButton (results to be used in onLayout() stage)
int count = getChildCount();
for(int x=0; x < count; ++x){
View button = getChildAt(x);
measureChild(button, newWidthMeasureSpec, newHeightMeasureSpec);
maxColWidth = Math.max(maxColWidth, button.getMeasuredWidth());
// determine RadioButton placement
int nextBottom = nextTop + button.getMeasuredHeight();
if(nextBottom > maxBottom){ // if current button will exceed border for this column ...
// ... move to next column
nextTop = getPaddingTop();
nextLeft += maxColWidth;
// adjust for next row values
nextBottom = nextTop + button.getMeasuredHeight();
maxColWidth = button.getMeasuredWidth();
}
int nextRight = nextLeft + button.getMeasuredWidth();
viewRectMap.put(button, new Rect(nextLeft, nextTop, nextRight, nextBottom));
// update nextTop
nextTop = nextBottom;
}
// width of RadioGroup is a natural by-product of placing all the children
int idealWidth = nextLeft + maxColWidth + getPaddingRight();
switch(MeasureSpec.getMode(widthMeasureSpec)){
case MeasureSpec.UNSPECIFIED:
return idealWidth;
case MeasureSpec.AT_MOST:
return Math.min(idealWidth, parentWidth);
case MeasureSpec.EXACTLY:
default:
return parentWidth;
}
}
}
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