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/**
******************************************************************************
* This file is part of the TouchGFX 4.10.0 distribution.
*
* @attention
*
* Copyright (c) 2018 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#include <gui/graph_screen/GraphLine.hpp>
using namespace touchgfx;
bool GraphLine::drawCanvasWidget(const Rect& invalidatedArea) const
{
if (numPoints < 2)
{
// A graph line with a single (or not even a single) point is invisible
return true;
}
int firstIndex = 0;
int lastIndex = numPoints - 1;
// We can skip the line from index if the left part of the line at index+1 is to the left of the invalidated area
while (firstIndex < lastIndex &&
invalidatedArea.x > (widgetXindex(firstIndex+1) + lineWidth/2).to<int>())
{
firstIndex++;
}
// We can skip the line from index if the left part of the line at index-1 is to the right of the invalidated area
while (lastIndex > firstIndex &&
invalidatedArea.right() < (widgetXindex(lastIndex-1) - lineWidth/2).to<int>())
{
lastIndex--;
}
if (firstIndex < lastIndex)
{
Canvas canvas(this, invalidatedArea);
canvas.moveTo(xAboveOutgoing(firstIndex ), yAboveOutgoing(firstIndex ));
canvas.lineTo(xAboveIncoming(firstIndex+1), yAboveIncoming(firstIndex+1));
for (int index = firstIndex + 1; index < lastIndex; index++)
{
canvas.lineTo(xAboveOutgoing(index ), yAboveOutgoing(index ));
canvas.lineTo(xAboveIncoming(index+1), yAboveIncoming(index+1));
}
for (int index = lastIndex-1; index >= firstIndex; index--)
{
canvas.lineTo(xBelowIncoming(index+1), yBelowIncoming(index+1));
canvas.lineTo(xBelowOutgoing(index ), yBelowOutgoing(index ));
}
return canvas.render();
}
return true;
}
Rect GraphLine::getMinimalRectContainingIndices(int firstIndex, int lastIndex) const
{
int minX = (widgetXindex(firstIndex) - lineWidth / 2).to<int>();
int maxX = (widgetXindex(lastIndex) + lineWidth / 2).to<int>();
int minY = (widgetYindex(firstIndex) - lineWidth / 2).to<int>();
int maxY = (widgetYindex(firstIndex) + lineWidth / 2).to<int>();
for (int index = firstIndex+1; index <= lastIndex; index++)
{
minY = MIN(minY, (widgetYindex(index) - lineWidth / 2).to<int>());
maxY = MAX(maxY, (widgetYindex(index) + lineWidth / 2).to<int>());
}
Rect minimalRect = Rect(minX, minY, maxX - minX + 1, maxY - minY + 1);
return minimalRect;
}