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// Copyright (C) 2023 The Qt Company Ltd.
// Copyright (C) 2012 BogDan Vatra <bogdan@kde.org>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
package org.qtproject.qt.android;
import android.app.Activity;
import android.content.Context;
import android.os.Build;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
class QtLayout extends ViewGroup {
public QtLayout(Context context)
{
super(context);
}
public QtLayout(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public QtLayout(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int count = getChildCount();
int maxHeight = 0;
int maxWidth = 0;
// Find out how big everyone wants to be
measureChildren(widthMeasureSpec, heightMeasureSpec);
// Find rightmost and bottom-most child
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
if (child.getVisibility() != GONE) {
int childRight;
int childBottom;
if (child.getLayoutParams() instanceof QtLayout.LayoutParams) {
QtLayout.LayoutParams lp
= (QtLayout.LayoutParams) child.getLayoutParams();
childRight = lp.x + child.getMeasuredWidth();
childBottom = lp.y + child.getMeasuredHeight();
} else {
childRight = child.getMeasuredWidth();
childBottom = child.getMeasuredHeight();
}
maxWidth = Math.max(maxWidth, childRight);
maxHeight = Math.max(maxHeight, childBottom);
}
}
// Check against minimum height and width
maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());
maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());
setMeasuredDimension(resolveSize(maxWidth, widthMeasureSpec),
resolveSize(maxHeight, heightMeasureSpec));
}
/**
* Returns a set of layout parameters with a width of
* {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT},
* a height of {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT}
* and with the coordinates (0, 0).
*/
@Override
protected ViewGroup.LayoutParams generateDefaultLayoutParams()
{
return new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
0,
0);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
if (child.getVisibility() != GONE) {
QtLayout.LayoutParams lp =
(QtLayout.LayoutParams) child.getLayoutParams();
int childLeft = lp.x;
int childTop = lp.y;
int childRight = (lp.width == ViewGroup.LayoutParams.MATCH_PARENT) ?
r - l : childLeft + child.getMeasuredWidth();
int childBottom = (lp.height == ViewGroup.LayoutParams.MATCH_PARENT) ?
b - t : childTop + child.getMeasuredHeight();
child.layout(childLeft, childTop, childRight, childBottom);
}
}
}
// Override to allow type-checking of LayoutParams.
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p)
{
return p instanceof QtLayout.LayoutParams;
}
@Override
protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p)
{
return new LayoutParams(p);
}
/**
* Per-child layout information associated with AbsoluteLayout.
* See {android.R.styleable#AbsoluteLayout_Layout Absolute Layout Attributes}
* for a list of all child view attributes that this class supports.
*/
public static class LayoutParams extends ViewGroup.LayoutParams
{
/**
* The horizontal, or X, location of the child within the view group.
*/
public int x;
/**
* The vertical, or Y, location of the child within the view group.
*/
public int y;
/**
* Creates a new set of layout parameters with the specified width,
* height and location.
*
* @param width the width, either {@link #FILL_PARENT},
{@link #WRAP_CONTENT} or a fixed size in pixels
* @param height the height, either {@link #FILL_PARENT},
{@link #WRAP_CONTENT} or a fixed size in pixels
* @param x the X location of the child
* @param y the Y location of the child
*/
public LayoutParams(int width, int height, int x, int y)
{
super(width, height);
this.x = x;
this.y = y;
}
public LayoutParams(int width, int height)
{
super(width, height);
}
/**
* {@inheritDoc}
*/
public LayoutParams(ViewGroup.LayoutParams source)
{
super(source);
}
}
public void moveChild(View view, int index)
{
if (view == null)
return;
if (indexOfChild(view) == -1)
return;
detachViewFromParent(view);
requestLayout();
invalidate();
attachViewToParent(view, index, view.getLayoutParams());
}
/**
* set the layout params on a child view.
* <p>
* Note: This function adds the child view if it's not in the
* layout already.
*/
public void setLayoutParams(final View childView,
final ViewGroup.LayoutParams params,
final boolean forceRedraw)
{
// Invalid view
if (childView == null)
return;
// Invalid params
if (!checkLayoutParams(params))
return;
// View is already in the layout and can therefore be updated
final boolean canUpdate = (this == childView.getParent());
if (canUpdate) {
childView.setLayoutParams(params);
if (forceRedraw)
invalidate();
} else {
addView(childView, params);
}
}
}
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