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[apps] Add a method draw segment to draw curve view

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Change-Id: I770cf498ecb58a0d12a4019278ef4e536cad2401
This commit is contained in:
Émilie Feral
2016-12-23 16:42:24 +01:00
parent 939a2eacb5
commit 6d550f2c8d
2 changed files with 25 additions and 0 deletions
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22
apps/curve_view.cpp
View File

@@ -118,6 +118,28 @@ void CurveView::drawLine(KDContext * ctx, KDRect rect, Axis axis, float coordina
}
}
void CurveView::drawSegment(KDContext * ctx, KDRect rect, Axis axis, float coordinate, float lowerBound, float upperBound, KDColor color, KDCoordinate thickness) const {
KDRect lineRect = KDRectZero;
switch(axis) {
// WARNING TODO: anti-aliasing?
case Axis::Horizontal:
lineRect = KDRect(
floorf(floatToPixel(Axis::Horizontal, lowerBound)), floatToPixel(Axis::Vertical, coordinate),
ceilf(floatToPixel(Axis::Horizontal, upperBound) - floatToPixel(Axis::Horizontal, lowerBound)), thickness
);
break;
case Axis::Vertical:
lineRect = KDRect(
floatToPixel(Axis::Horizontal, coordinate), floorf(floatToPixel(Axis::Vertical, upperBound)),
thickness, ceilf(floatToPixel(Axis::Vertical, lowerBound) - floatToPixel(Axis::Vertical, upperBound))
);
break;
}
if (rect.intersects(lineRect)) {
ctx->fillRect(lineRect, color);
}
}
void CurveView::drawAxes(Axis axis, KDContext * ctx, KDRect rect) const {
drawLine(ctx, rect, axis, 0.0f, k_axisColor, 2);
}

3
apps/curve_view.h
View File

@@ -30,6 +30,9 @@ protected:
float floatToPixel(Axis axis, float f) const;
void drawLine(KDContext * ctx, KDRect rect, Axis axis,
float coordinate, KDColor color, KDCoordinate thickness = 1) const;
void drawSegment(KDContext * ctx, KDRect rect, Axis axis,
float coordinate, float lowerBound, float upperBound,
KDColor color, KDCoordinate thickness = 1) const;
void drawAxes(Axis axis, KDContext * ctx, KDRect rect) const;
void drawCurve(void * curve, KDColor color, KDContext * ctx, KDRect rect, bool colorUnderCurve = false, float colorLowerBound = 0.0f, float colorUpperBound = 0.0f, bool continuously = false) const;
void drawDiscreteHistogram(KDColor color, KDContext * ctx, KDRect rect, bool colorHighlightBin = false, KDColor highlightColor = KDColorBlack, float colorLowerBound = 0.0f, float colorUpperBound = 0.0f) const;