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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package org.libreoffice.canvas;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.RectF;
import org.libreoffice.LOKitShell;
import org.mozilla.gecko.gfx.LayerView;
/**
* This class is responsible to draw and reposition the selection
* rectangle.
*/
public class GraphicSelectionCanvasElement {
private final Paint mGraphicSelectionPaint;
public RectF mRectangle = new RectF();
public RectF mScaledRectangle = new RectF();
private RectF mDrawRectangle = new RectF();
private DragType mType = DragType.NONE;
private PointF mStartDragPosition;
private GraphicSelectionHandleCanvasElement mHandles[] = new GraphicSelectionHandleCanvasElement[8];
private GraphicSelectionHandleCanvasElement mDragHandle = null;
public GraphicSelectionCanvasElement(Paint graphicSelectionPaint) {
mGraphicSelectionPaint = graphicSelectionPaint;
mHandles[0] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[1] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[2] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[3] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[4] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[5] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[6] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
mHandles[7] = new GraphicSelectionHandleCanvasElement(mGraphicSelectionPaint);
}
public void reposition(RectF scaledRectangle) {
mScaledRectangle = scaledRectangle;
mDrawRectangle = scaledRectangle;
mHandles[0].reposition(scaledRectangle.left, scaledRectangle.top);
mHandles[1].reposition(scaledRectangle.centerX(), scaledRectangle.top);
mHandles[2].reposition(scaledRectangle.right, scaledRectangle.top);
mHandles[3].reposition(scaledRectangle.left, scaledRectangle.centerY());
mHandles[4].reposition(scaledRectangle.right, scaledRectangle.centerY());
mHandles[5].reposition(scaledRectangle.left, scaledRectangle.bottom);
mHandles[6].reposition(scaledRectangle.centerX(), scaledRectangle.bottom);
mHandles[7].reposition(scaledRectangle.right, scaledRectangle.bottom);
}
public boolean contains(float x, float y) {
// Check if handle was hit
for (GraphicSelectionHandleCanvasElement handle : mHandles) {
if (handle.contains(x, y)) {
return true;
}
}
return mScaledRectangle.contains(x, y);
}
public void draw(Canvas canvas) {
canvas.drawRect(mDrawRectangle, mGraphicSelectionPaint);
for (GraphicSelectionHandleCanvasElement handle : mHandles) {
if (mType == DragType.MOVE || mType == DragType.EXTEND) {
handle.drawSelected(canvas);
} else {
handle.draw(canvas);
}
}
}
public void dragStart(PointF position) {
mDragHandle = null;
mType = DragType.NONE;
for (GraphicSelectionHandleCanvasElement handle : mHandles) {
if (handle.contains(position.x, position.y)) {
mDragHandle = handle;
mType = DragType.EXTEND;
sendGraphicSelectionStart(handle.mPosition);
}
}
if (mDragHandle == null) {
mType = DragType.MOVE;
sendGraphicSelectionStart(position);
}
mStartDragPosition = position;
}
public void dragging(PointF position) {
if (mType == DragType.MOVE) {
float deltaX = position.x - mStartDragPosition.x;
float deltaY = position.y - mStartDragPosition.y;
mDrawRectangle = new RectF(mScaledRectangle);
mDrawRectangle.offset(deltaX, deltaY);
} else if (mType == DragType.EXTEND) {
mDrawRectangle = new RectF(mScaledRectangle);
mDrawRectangle.union(position.x, position.y);
}
}
public void dragEnd(PointF position) {
PointF point = new PointF();
if (mDragHandle != null) {
point.x = mDragHandle.mPosition.x;
point.y = mDragHandle.mPosition.y;
} else {
point.x = mStartDragPosition.x;
point.y = mStartDragPosition.y;
}
float deltaX = position.x - mStartDragPosition.x;
float deltaY = position.y - mStartDragPosition.y;
point.offset(deltaX, deltaY);
sendGraphicSelectionEnd(point);
mDrawRectangle = mScaledRectangle;
mDragHandle = null;
mType = DragType.NONE;
}
private void sendGraphicSelectionStart(PointF screenPosition) {
LayerView layerView = LOKitShell.getLayerView();
if (layerView != null) {
PointF documentPoint = layerView.getLayerClient().convertViewPointToLayerPoint(screenPosition);
LOKitShell.sendTouchEvent("GraphicSelectionStart", documentPoint);
}
}
private void sendGraphicSelectionEnd(PointF screenPosition) {
LayerView layerView = LOKitShell.getLayerView();
if (layerView != null) {
PointF documentPoint = layerView.getLayerClient().convertViewPointToLayerPoint(screenPosition);
LOKitShell.sendTouchEvent("GraphicSelectionEnd", documentPoint);
}
}
public enum DragType {
NONE,
MOVE,
EXTEND
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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