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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/AbstractGraph.hpp>
using namespace touchgfx;
AbstractGraph::AbstractGraph() :
CanvasWidget(), linkedGraph(0), left(-1), right(-1), top(-1), bottom(-1), points(0), maxPoints(0), lineWidth(0)
{
clearGraph();
}
AbstractGraph::~AbstractGraph()
{
}
CWRUtil::Q5 AbstractGraph::widgetX(int x) const
{
if (graphWidth == 0) return CWRUtil::toQ5(0);
return CWRUtil::toQ5(x - left) * widgetWidth / graphWidth;
}
CWRUtil::Q5 AbstractGraph::widgetY(int y) const
{
if (graphHeight == 0) return CWRUtil::toQ5(0);
return CWRUtil::toQ5(y - top) * widgetHeight / graphHeight;
}
CWRUtil::Q5 AbstractGraph::widgetXindex(int index) const
{
return widgetX(points[index].x);
}
CWRUtil::Q5 AbstractGraph::widgetYindex(int index) const
{
return widgetY(points[index].y);
}
void AbstractGraph::setBuffer(GraphPoint *pointsBuffer, int numPointsInBuffer)
{
points = pointsBuffer;
maxPoints = numPointsInBuffer;
numPoints = 0;
if (linkedGraph)
{
linkedGraph->setBuffer(pointsBuffer, numPointsInBuffer);
}
}
void AbstractGraph::setLinkedGraph(AbstractGraph &other)
{
if (linkedGraph == &other)
{
return;
}
if (linkedGraph != 0)
{
linkedGraph->setLinkedGraph(other);
}
else
{
linkedGraph = &other;
}
}
void AbstractGraph::setRange(int newLeft, int newRight, int newTop, int newBottom)
{
if (left != newLeft || right != newRight || top != newTop || bottom != newBottom)
{
assignRange(newLeft, newRight, newTop, newBottom);
if (numPoints > 0)
{
updateAndInvalidateCacheForLinesBetweenIndeces(0, numPoints - 1);
}
}
}
void AbstractGraph::setX(int16_t x)
{
CanvasWidget::setX(x);
if (linkedGraph)
{
linkedGraph->setX(x);
}
}
void AbstractGraph::setY(int16_t y)
{
CanvasWidget::setY(y);
if (linkedGraph)
{
linkedGraph->setY(y);
}
}
void AbstractGraph::setWidth(int16_t width)
{
assignWidth(width);
if (numPoints > 0)
{
updateAndInvalidateCacheForLinesBetweenIndeces(0, numPoints - 1);
}
}
void AbstractGraph::setHeight(int16_t height)
{
assignHeight(height);
if (numPoints > 0)
{
updateAndInvalidateCacheForLinesBetweenIndeces(0, numPoints - 1);
}
}
void AbstractGraph::clearGraph()
{
numPoints = 0;
if (linkedGraph)
{
linkedGraph->clearGraph();
}
}
bool AbstractGraph::addValue(int x, int y)
{
if (numPoints >= maxPoints)
{
return false;
}
if (numPoints == 0 || x > points[numPoints-1].x)
{
// Point added at end of graph line
points[numPoints].x = x;
points[numPoints].y = y;
setNumPoints(numPoints + 1);
updateAndInvalidateCacheForLinesBetweenIndeces(numPoints - 2, numPoints - 1);
}
else
{
int index = findX(x);
assert(points[index].x >= x && "Bug in binary search algorithm");
if (points[index].x > x)
{
// Point with given X not already in graph line, insert it
invalidateLineFromIndex(index);
insertPointAtIndex(index);
points[index].x = x;
points[index].y = y;
updateAndInvalidateCacheForLinesBetweenIndeces(index - 1, index + 1);
}
else // (points[index].x == x)
{
// Point with given X already exists in graph line, replace it (unless the
// exact same point was already there)
if (points[index].y != y)
{
// New Y value, so update the point on the graph line
invalidateLineFromIndex(index-1);
invalidateLineFromIndex(index);
points[index].x = x; // Actually not necessary
points[index].y = y;
updateAndInvalidateCacheForLinesBetweenIndeces(index - 1, index + 1);
}
}
}
return true;
}
bool AbstractGraph::deleteValue(int x)
{
int index = findX(x);
if (index < numPoints && points[index].x == x)
{
// Point with given X found in graph line
if (index > 0)
{
invalidateLineFromIndex(index-1);
}
invalidateLineFromIndex(index);
deletePointAtIndex(index);
if (numPoints > 0)
{
updateAndInvalidateCacheForLinesBetweenIndeces(MAX(0, index - 1), index);
}
return true;
}
return false;
}
bool AbstractGraph::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));
}
if (lineWidth == 0)
{
CWRUtil::Q5 xBelow = xBelowIncoming(lastIndex);
if (xBelow > xAboveIncoming(lastIndex))
{
canvas.lineTo(xBelow, yBelowIncoming(lastIndex));
}
canvas.lineTo(xAboveIncoming(lastIndex), widgetY(bottom));
canvas.lineTo(xAboveOutgoing(firstIndex), widgetY(bottom));
xBelow = xBelowOutgoing(firstIndex);
if (xBelow < xAboveOutgoing(firstIndex))
{
canvas.lineTo(xBelow, yBelowOutgoing(firstIndex));
}
}
else
{
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;
}
void AbstractGraph::invalidateRectContainingIndices(int firstIndex, int lastIndex) const
{
Rect minimalRect = getMinimalRectContainingIndices(firstIndex, lastIndex);
invalidateRect(minimalRect);
if (linkedGraph)
{
linkedGraph->invalidateRectContainingIndices(firstIndex, lastIndex);
}
}
void AbstractGraph::updateAndInvalidateCacheForLinesBetweenIndeces(int firstIndex, int lastIndex)
{
if (firstIndex < 0) firstIndex = 0;
if (lastIndex >= numPoints) lastIndex = numPoints - 1;
if (firstIndex > lastIndex) return;
if (getWidth() == 0 || getHeight() == 0 || left == right ||top == bottom)
{
// No width or no height
return;
}
// Calculate the slopes of all lines
for (int index = firstIndex; index < lastIndex; index++)
{
CWRUtil::Q5 dy = (widgetYindex(index+1) - widgetYindex(index));
CWRUtil::Q5 dx = (widgetXindex(index+1) - widgetXindex(index));
CWRUtil::Q5 d = CWRUtil::sqrtQ10(dy*dy+dx*dx);
if (d != 0) // Should not happen, but if range is zero high/wide it does
{
points[index].dy = (lineWidth * dy / d) / 2;
points[index].dx = (lineWidth * dx / d) / 2;
}
}
invalidateRectContainingIndices(firstIndex, lastIndex);
}
Rect AbstractGraph::getMinimalRect() const
{
if (numPoints < 1 || graphWidth == 0 || graphHeight == 0)
{
return Rect(0,0,0,0);
}
return getMinimalRectContainingIndices(0, numPoints-1);
}
void AbstractGraph::setNumPoints(int numPointsUsed)
{
numPoints = numPointsUsed;
if (linkedGraph)
{
linkedGraph->setNumPoints(numPointsUsed);
}
}
void AbstractGraph::invalidateLineFromIndex(int index)
{
invalidateRectContainingIndices(index, index + 1);
if (linkedGraph)
{
linkedGraph->invalidateLineFromIndex(index);
}
}
void AbstractGraph::insertPointAtIndex(int index)
{
assert(numPoints < maxPoints && "Unable to insert more points in array");
assert(index >= 0 && index <= numPoints && "Illegal index"); // Allow insert at first position outside array
for (int i = numPoints; i > index; i--)
{
points[i] = points[i - 1];
}
setNumPoints(numPoints + 1);
}
void AbstractGraph::deletePointAtIndex(int index)
{
assert(index >= 0 && index < numPoints && "Illegal index");
setNumPoints(numPoints - 1);
for (int i = index; i < numPoints; i++)
{
points[i] = points[i + 1];
}
}
int AbstractGraph::findX(int x)
{
// No points, or x larger than all existing x coordinates
if (numPoints == 0 || x > points[numPoints-1].x)
{
return numPoints;
}
// Setup search limits
int loIndex = 0;
int hiIndex = numPoints-1;
while (loIndex <= hiIndex)
{
int midIndex = (loIndex + hiIndex) / 2;
int midX = points[midIndex].x;
if (x < midX)
{
// Search lower half
hiIndex = midIndex - 1;
}
else if (x > midX)
{
// Search higher half
loIndex = midIndex + 1;
}
else
{
// Found
return midIndex;
}
}
// Return first index over wanted x coordinate
return loIndex;
}
void AbstractGraph::assignRange(int newLeft, int newRight, int newTop, int newBottom)
{
left = newLeft;
right = newRight;
top = newTop;
bottom = newBottom;
graphWidth = CWRUtil::toQ5(newRight - newLeft);
graphHeight = CWRUtil::toQ5(newBottom - newTop);
if (linkedGraph)
{
linkedGraph->assignRange(newLeft, newRight, newTop, newBottom);
}
}
void AbstractGraph::assignWidth(int16_t width)
{
CanvasWidget::setWidth(width);
widgetWidth = CWRUtil::toQ5(getWidth());
if (linkedGraph)
{
linkedGraph->assignWidth(width);
}
}
void AbstractGraph::assignHeight(int16_t height)
{
CanvasWidget::setHeight(height);
widgetHeight = CWRUtil::toQ5(getHeight());
if (linkedGraph)
{
linkedGraph->assignHeight(height);
}
}