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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/GraphBelow.hpp>
using namespace touchgfx;
bool GraphBelow::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(widgetXindex(firstIndex), widgetYindex(firstIndex));
for (int index = firstIndex + 1; index <= lastIndex; index++)
{
canvas.lineTo(widgetXindex(index), widgetYindex(index));
}
canvas.lineTo(widgetXindex(lastIndex), widgetY(0));
canvas.lineTo(widgetXindex(firstIndex), widgetY(0));
// canvas.lineTo(widgetXindex(lastIndex), widgetY(bottom));
// canvas.lineTo(widgetXindex(firstIndex), widgetY(bottom));
return canvas.render();
}
return true;
}
Rect GraphBelow::getMinimalRectContainingIndices(int firstIndex, int lastIndex) const
{
int minX = widgetXindex(firstIndex).to<int>();
int maxX = widgetXindex(lastIndex).to<int>();
int zeroY = widgetY(0).to<int>();
int firstY = widgetYindex(firstIndex).to<int>();
int minY = MIN(zeroY, firstY);
int maxY = MAX(zeroY, firstY);
for (int index = firstIndex+1; index <= lastIndex; index++)
{
int y = widgetYindex(index).to<int>();
minY = MIN(minY, y);
maxY = MAX(maxY, y);
}
return Rect(minX, minY, maxX - minX + 1, maxY - minY + 1);
}