/*
* Copyright 2012 AndroidPlot.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.androidplot.ui;
import android.graphics.*;
import android.view.MotionEvent;
import android.view.View;
import com.androidplot.exception.PlotRenderException;
import com.androidplot.ui.widget.Widget;
import com.androidplot.util.DisplayDimensions;
import com.androidplot.util.ZLinkedList;
public class LayoutManager extends ZLinkedList<Widget>
implements View.OnTouchListener, Resizable {
private boolean drawAnchorsEnabled = false;
private Paint anchorPaint;
private boolean drawOutlinesEnabled = false;
private Paint outlinePaint;
private boolean drawOutlineShadowsEnabled = false;
private Paint outlineShadowPaint;
private boolean drawMarginsEnabled = false;
private Paint marginPaint;
private boolean drawPaddingEnabled = false;
private Paint paddingPaint;
private DisplayDimensions displayDims = new DisplayDimensions();
// cache of widget rects
//private HashMap<Widget, DisplayDimensions> widgetRects;
{
//widgetRects = new HashMap<Widget, DisplayDimensions>();
anchorPaint = new Paint();
anchorPaint.setStyle(Paint.Style.FILL);
anchorPaint.setColor(Color.GREEN);
outlinePaint = new Paint();
outlinePaint.setColor(Color.GREEN);
outlinePaint.setStyle(Paint.Style.STROKE);
marginPaint = new Paint();
marginPaint.setColor(Color.YELLOW);
marginPaint.setStyle(Paint.Style.FILL);
marginPaint.setAlpha(200);
paddingPaint= new Paint();
paddingPaint.setColor(Color.BLUE);
paddingPaint.setStyle(Paint.Style.FILL);
paddingPaint.setAlpha(200);
}
/**
* Invoked immediately following XML configuration.
*/
public synchronized void onPostInit() {
for(Widget w : elements()) {
w.onPostInit();
}
}
public LayoutManager() {
}
public void setMarkupEnabled(boolean enabled) {
setDrawOutlinesEnabled(enabled);
setDrawAnchorsEnabled(enabled);
setDrawMarginsEnabled(enabled);
setDrawPaddingEnabled(enabled);
setDrawOutlineShadowsEnabled(enabled);
}
public void draw(Canvas canvas) throws PlotRenderException {
if(isDrawMarginsEnabled()) {
drawSpacing(canvas, displayDims.canvasRect, displayDims.marginatedRect, marginPaint);
}
if (isDrawPaddingEnabled()) {
drawSpacing(canvas, displayDims.marginatedRect, displayDims.paddedRect, paddingPaint);
}
for (Widget widget : elements()) {
//int canvasState = canvas.save(Canvas.ALL_SAVE_FLAG); // preserve clipping etc
try {
canvas.save(Canvas.ALL_SAVE_FLAG);
PositionMetrics metrics = widget.getPositionMetrics();
float elementWidth = widget.getWidthPix(displayDims.paddedRect.width());
float elementHeight = widget.getHeightPix(displayDims.paddedRect.height());
PointF coords = widget.getElementCoordinates(elementHeight,
elementWidth, displayDims.paddedRect, metrics);
//RectF widgetRect = new RectF(coords.x, coords.y, coords.x + elementWidth, coords.y + elementHeight);
//DisplayDimensions dims = widgetRects.get(widget);
DisplayDimensions dims = widget.getWidgetDimensions();
//RectF widgetRect = widgetRects.get(widget);
if (drawOutlineShadowsEnabled) {
canvas.drawRect(dims.canvasRect, outlineShadowPaint);
}
// not positive why this is, but the rect clipped by clipRect is 1 less than the one drawn by drawRect.
// so this is necessary to avoid clipping borders. I suspect that its a floating point
// jitter issue.
if (widget.isClippingEnabled()) {
//RectF clipRect = new RectF(l-1, t-1, r + 1, b + 1);
//canvas.clipRect(clipRect, Region.Op.REPLACE);
canvas.clipRect(dims.canvasRect, Region.Op.INTERSECT);
}
widget.draw(canvas, dims.canvasRect);
//RectF marginatedWidgetRect = widget.getMarginatedRect(dims.canvasRect);
//RectF paddedWidgetRect = widget.getPaddedRect(marginatedWidgetRect);
if (drawMarginsEnabled) {
drawSpacing(canvas, dims.canvasRect, dims.marginatedRect, getMarginPaint());
}
if (drawPaddingEnabled) {
drawSpacing(canvas, dims.marginatedRect, dims.paddedRect, getPaddingPaint());
}
if (drawAnchorsEnabled) {
PointF anchorCoords =
Widget.getAnchorCoordinates(coords.x, coords.y, elementWidth,
elementHeight, metrics.getAnchor());
drawAnchor(canvas, anchorCoords);
}
if (drawOutlinesEnabled) {
outlinePaint.setAntiAlias(true);
canvas.drawRect(dims.canvasRect, outlinePaint);
}
} finally {
//canvas.restoreToCount(canvasState); // restore clipping etc.
canvas.restore();
}
}
}
private void drawSpacing(Canvas canvas, RectF outer, RectF inner, Paint paint) {
//int saved = canvas.save(Canvas.ALL_SAVE_FLAG);
try {
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.clipRect(inner, Region.Op.DIFFERENCE);
canvas.drawRect(outer, paint);
//canvas.restoreToCount(saved);
} finally {
canvas.restore();
}
}
protected void drawAnchor(Canvas canvas, PointF coords) {
float anchorSize = 4;
canvas.drawRect(coords.x-anchorSize, coords.y-anchorSize, coords.x+anchorSize, coords.y+anchorSize, anchorPaint);
}
public boolean isDrawOutlinesEnabled() {
return drawOutlinesEnabled;
}
public void setDrawOutlinesEnabled(boolean drawOutlinesEnabled) {
this.drawOutlinesEnabled = drawOutlinesEnabled;
}
public Paint getOutlinePaint() {
return outlinePaint;
}
public void setOutlinePaint(Paint outlinePaint) {
this.outlinePaint = outlinePaint;
}
public boolean isDrawAnchorsEnabled() {
return drawAnchorsEnabled;
}
public void setDrawAnchorsEnabled(boolean drawAnchorsEnabled) {
this.drawAnchorsEnabled = drawAnchorsEnabled;
}
public boolean isDrawMarginsEnabled() {
return drawMarginsEnabled;
}
public void setDrawMarginsEnabled(boolean drawMarginsEnabled) {
this.drawMarginsEnabled = drawMarginsEnabled;
}
public Paint getMarginPaint() {
return marginPaint;
}
public void setMarginPaint(Paint marginPaint) {
this.marginPaint = marginPaint;
}
public boolean isDrawPaddingEnabled() {
return drawPaddingEnabled;
}
public void setDrawPaddingEnabled(boolean drawPaddingEnabled) {
this.drawPaddingEnabled = drawPaddingEnabled;
}
public Paint getPaddingPaint() {
return paddingPaint;
}
public void setPaddingPaint(Paint paddingPaint) {
this.paddingPaint = paddingPaint;
}
public boolean isDrawOutlineShadowsEnabled() {
return drawOutlineShadowsEnabled;
}
public void setDrawOutlineShadowsEnabled(boolean drawOutlineShadowsEnabled) {
this.drawOutlineShadowsEnabled = drawOutlineShadowsEnabled;
if(drawOutlineShadowsEnabled && outlineShadowPaint == null) {
// use a default shadow effect in the case where none has been set:
outlineShadowPaint = new Paint();
outlineShadowPaint.setColor(Color.DKGRAY);
outlineShadowPaint.setStyle(Paint.Style.FILL);
outlineShadowPaint.setShadowLayer(3, 5, 5, Color.BLACK);
}
}
public Paint getOutlineShadowPaint() {
return outlineShadowPaint;
}
public void setOutlineShadowPaint(Paint outlineShadowPaint) {
this.outlineShadowPaint = outlineShadowPaint;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
/**
* Recalculates layouts for all widgets using last set
* DisplayDimensions. Care should be excersized when choosing when
* to call this method as it is a relatively slow operation.
*/
public void refreshLayout() {
//widgetRects.clear();
for (Widget widget : elements()) {
widget.layout(displayDims);
}
}
@Override
public void layout(final DisplayDimensions dims) {
this.displayDims = dims;
refreshLayout();
}
}