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[apps/graph/values] Enable function title cell to draw a derivative

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function title

Change-Id: I20f207bb73bf1459029601fb5900fbbd12ec3b77
This commit is contained in:
Émilie Feral
2016-10-19 17:34:15 +02:00
parent b12bf3641b
commit 678fc5b437
2 changed files with 12 additions and 1 deletions
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11
apps/graph/values/function_title_cell.cpp
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@@ -7,13 +7,22 @@ void FunctionTitleCell::setColor(KDColor color) {
m_functionColor = color;
}
void FunctionTitleCell::setDerivative(bool derivative) {
m_derivative = derivative;
}
void FunctionTitleCell::drawRect(KDContext * ctx, KDRect rect) const {
EvenOddCell::drawRect(ctx, rect);
// Write the "(x)"
KDColor background = backgroundColor();
KDSize textSize = KDText::stringSize("f");
KDPoint origin(0.5f*(m_frame.width() - textSize.width()), 0.5f*(m_frame.height() - textSize.height()));
ctx->drawString(Function::Parameter, origin.translatedBy(KDPoint(textSize.width(), 0)), m_functionColor , background);
if (m_derivative) {
ctx->drawString("'", origin.translatedBy(KDPoint(textSize.width(), 0)), m_functionColor , background);
ctx->drawString(Function::Parameter, origin.translatedBy(KDPoint(2*textSize.width(), 0)), m_functionColor , background);
} else {
ctx->drawString(Function::Parameter, origin.translatedBy(KDPoint(textSize.width(), 0)), m_functionColor , background);
}
// Color the color indicator
ctx->fillRect(KDRect(0, 0, bounds().width(), k_colorIndicatorThickness), m_functionColor);
}