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GraphApp: Use a FunctionStore

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Change-Id: Ib75947c40167489726fafc493ccb0ebf2862142b
This commit is contained in:
Romain Goyet
2016-08-22 14:40:07 +02:00
parent e1dcffd4ce
commit 00afebbe2d
15 changed files with 166 additions and 36 deletions
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21
apps/graph/graph/graph_view.cpp
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@@ -7,7 +7,7 @@ constexpr KDColor kSecondaryGridColor = KDColor(0xEEEEEE);
constexpr int kNumberOfMainGridLines = 5;
constexpr int kNumberOfSecondaryGridLines = 4;
GraphView::GraphView() :
GraphView::GraphView(Graph::FunctionStore * functionStore) :
#if GRAPH_VIEW_IS_TILED
TiledView(),
#else
@@ -18,7 +18,8 @@ GraphView::GraphView() :
m_xMin(-2.0f),
m_xMax(2.0f),
m_yMin(-2.0f),
m_yMax(2.0f)
m_yMax(2.0f),
m_functionStore(functionStore)
{
}
@@ -157,14 +158,18 @@ void GraphView::drawFunction(KDContext * ctx, KDRect rect) const {
KDColor workingBuffer[stampSize*stampSize];
Context plotContext;
for (KDCoordinate px = rect.x()-stampSize; px<rect.right(); px++) {
float x = pixelToFloat(Axis::Horizontal, px);
float y = (x-1)*(x+1)*x;
KDCoordinate py = floatToPixel(Axis::Vertical, y);
KDRect stampRect(px, py, stampSize, stampSize);
//KDColor red = KDColorRed;
ctx->fillRectWithMask(stampRect, KDColorRed, mask, workingBuffer);
//KDBlitRect(stampRect, &red, {1,1}, mask, {stampSize,stampSize});
for (int i=0; i<m_functionStore->numberOfFunctions(); i++) {
Float xExp = Float(x);
plotContext.setExpressionForSymbolName(&xExp, "x");
Graph::Function * f = m_functionStore->functionAtIndex(i);
float y = f->expression()->approximate(plotContext);
KDCoordinate py = floatToPixel(Axis::Vertical, y);
KDRect stampRect(px, py, stampSize, stampSize);
ctx->fillRectWithMask(stampRect, KDColorRed, mask, workingBuffer);
}
}
}