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NativeScript layouts implemented in Java

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hshristov
2015-07-16 00:11:50 +03:00
commit 1299747cf6
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176
src/org/nativescript/widgets/DockLayout.java Normal file
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/**
*
*/
package org.nativescript.widgets;
import android.content.Context;
import android.view.View;
/**
* @author hhristov
*
*/
public class DockLayout extends LayoutBase {
private boolean _stretchLastChild = true;
public DockLayout(Context context) {
super(context);
}
public boolean getStretchLastChild() {
return this._stretchLastChild;
}
public void setStretchLastChild(boolean value) {
this._stretchLastChild = value;
this.requestLayout();
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int measureWidth = 0;
int measureHeight = 0;
int width = View.MeasureSpec.getSize(widthMeasureSpec);
int widthMode = View.MeasureSpec.getMode(widthMeasureSpec);
int height = View.MeasureSpec.getSize(heightMeasureSpec);
int heightMode = View.MeasureSpec.getMode(heightMeasureSpec);
int verticalPadding = this.getPaddingTop() + this.getPaddingBottom();
int horizontalPadding = this.getPaddingLeft() + this.getPaddingRight();
int remainingWidth = widthMode == MeasureSpec.UNSPECIFIED ? Integer.MAX_VALUE : width - horizontalPadding;
int remainingHeight = heightMode == MeasureSpec.UNSPECIFIED ? Integer.MAX_VALUE : height - verticalPadding;
int tempHeight = 0;
int tempWidth = 0;
int childWidthMeasureSpec = 0;
int childHeightMeasureSpec = 0;
int count = this.getChildCount();
for (int i = 0; i < count; i++) {
View child = this.getChildAt(i);
if (child.getVisibility() == View.GONE) {
continue;
}
if (this._stretchLastChild && (i == (count - 1))) {
childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(remainingWidth, widthMode);
childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(remainingHeight, heightMode);
}
else {
// Measure children with AT_MOST even if our mode is EXACT
childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(remainingWidth, widthMode == MeasureSpec.EXACTLY ? MeasureSpec.AT_MOST : widthMode);
childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(remainingHeight, heightMode == MeasureSpec.EXACTLY ? MeasureSpec.AT_MOST : heightMode);
}
CommonLayoutParams.measureChild(child, childWidthMeasureSpec, childHeightMeasureSpec);
final int childMeasuredWidth = CommonLayoutParams.getDesiredWidth(child);
final int childMeasuredHeight = CommonLayoutParams.getDesiredHeight(child);
CommonLayoutParams childLayoutParams = (CommonLayoutParams)child.getLayoutParams();
Dock dock = childLayoutParams.dock;
switch (dock) {
case top:
case bottom:
remainingHeight = Math.max(0, remainingHeight - childMeasuredHeight);
tempHeight += childMeasuredHeight;
measureWidth = Math.max(measureWidth, tempWidth + childMeasuredWidth);
measureHeight = Math.max(measureHeight, tempHeight);
break;
case left:
case right:
default:
remainingWidth = Math.max(0, remainingWidth - childMeasuredWidth);
tempWidth += childMeasuredWidth;
measureWidth = Math.max(measureWidth, tempWidth);
measureHeight = Math.max(measureHeight, tempHeight + childMeasuredHeight);
break;
}
}
// Add in our padding
measureWidth += horizontalPadding;
measureHeight += verticalPadding;
// Check against our minimum sizes
measureWidth = Math.max(measureWidth, this.getSuggestedMinimumWidth());
measureHeight = Math.max(measureHeight, this.getSuggestedMinimumHeight());
int widthSizeAndState = resolveSizeAndState(measureWidth, widthMeasureSpec, 0);
int heightSizeAndState = resolveSizeAndState(measureHeight, heightMeasureSpec, 0);
this.setMeasuredDimension(widthSizeAndState, heightSizeAndState);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
int childLeft = this.getPaddingLeft();
int childTop = this.getPaddingTop();
int x = childLeft;
int y = childTop;
int remainingWidth = Math.max(0, right - left - (this.getPaddingLeft() + this.getPaddingRight()));
int remainingHeight = Math.max(0, bottom - top - (this.getPaddingTop() + this.getPaddingBottom()));
int count = this.getChildCount();
View childToStretch = null;
if (count > 0 && this._stretchLastChild) {
count--;
childToStretch = this.getChildAt(count);
}
for (int i = 0; i < count; i++) {
View child = this.getChildAt(i);
if (child.getVisibility() == View.GONE) {
continue;
}
CommonLayoutParams childLayoutParams = (CommonLayoutParams)child.getLayoutParams();
int childWidth = CommonLayoutParams.getDesiredWidth(child);
int childHeight = CommonLayoutParams.getDesiredHeight(child);
switch (childLayoutParams.dock) {
case top:
childLeft = x;
childTop = y;
childWidth = remainingWidth;
y += childHeight;
remainingHeight = Math.max(0, remainingHeight - childHeight);
break;
case bottom:
childLeft = x;
childTop = y + remainingHeight - childHeight;
childWidth = remainingWidth;
remainingHeight = Math.max(0, remainingHeight - childHeight);
break;
case right:
childLeft = x + remainingWidth - childWidth;
childTop = y;
childHeight = remainingHeight;
remainingWidth = Math.max(0, remainingWidth - childWidth);
break;
case left:
default:
childLeft = x;
childTop = y;
childHeight = remainingHeight;
x += childWidth;
remainingWidth = Math.max(0, remainingWidth - childWidth);
break;
}
CommonLayoutParams.layoutChild(child, childLeft, childTop, childLeft + childWidth, childTop + childHeight);
}
if (childToStretch != null) {
CommonLayoutParams.layoutChild(childToStretch, x, y, x + remainingWidth, y + remainingHeight);
}
}
}