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[poincare] Create a product layout class

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Change-Id: I52f197f995fe953eddcb5a951255fb8558e7f610
This commit is contained in:
Émilie Feral
2017-01-15 20:02:02 +01:00
parent b1394ce0bf
commit ec4178b2b9
3 changed files with 106 additions and 0 deletions
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1
poincare/Makefile
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@@ -46,6 +46,7 @@ objs += $(addprefix poincare/src/layout/,\
matrix_layout.o\
nth_root_layout.o\
parenthesis_layout.o\
product_layout.o\
string_layout.o\
sum_layout.o\
subscript_layout.o\

78
poincare/src/layout/product_layout.cpp Normal file
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@@ -0,0 +1,78 @@
#include "product_layout.h"
#include <string.h>
#include <assert.h>
ProductLayout::ProductLayout(ExpressionLayout * lowerBoundLayout, ExpressionLayout * upperBoundLayout, ExpressionLayout * argumentLayout) :
ExpressionLayout(),
m_lowerBoundLayout(lowerBoundLayout),
m_upperBoundLayout(upperBoundLayout),
m_argumentLayout(argumentLayout)
{
m_lowerBoundLayout->setParent(this);
m_upperBoundLayout->setParent(this);
m_argumentLayout->setParent(this);
m_baseline = max(m_upperBoundLayout->size().height()+k_boundHeightMargin+k_symbolHeight, m_argumentLayout->baseline());
}
ProductLayout::~ProductLayout() {
delete m_lowerBoundLayout;
delete m_upperBoundLayout;
delete m_argumentLayout;
}
void ProductLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
KDSize upperBoundSize = m_upperBoundLayout->size();
KDSize lowerBoundSize = m_lowerBoundLayout->size();
ctx->fillRect(KDRect(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundSize.width()-k_symbolWidth)/2),
p.y() + max(upperBoundSize.height()+k_boundHeightMargin, m_argumentLayout->baseline()-k_symbolHeight),
k_lineThickness, k_symbolHeight), expressionColor);
ctx->fillRect(KDRect(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundSize.width()-k_symbolWidth)/2),
p.y() + max(upperBoundSize.height()+k_boundHeightMargin, m_argumentLayout->baseline()-k_symbolHeight),
k_symbolWidth, k_lineThickness), expressionColor);
ctx->fillRect(KDRect(p.x() + max(max(0, (upperBoundSize.width()-k_symbolWidth)/2), (lowerBoundSize.width()-k_symbolWidth)/2)+k_symbolWidth,
p.y() + max(upperBoundSize.height()+k_boundHeightMargin, m_argumentLayout->baseline()-k_symbolHeight),
k_lineThickness, k_symbolHeight), expressionColor);
}
KDSize ProductLayout::computeSize() {
KDSize argumentSize = m_argumentLayout->size();
KDSize lowerBoundSize = m_lowerBoundLayout->size();
KDSize upperBoundSize = m_upperBoundLayout->size();
return KDSize(
max(max(k_symbolWidth, lowerBoundSize.width()), upperBoundSize.width())+k_argumentWidthMargin+argumentSize.width(),
m_baseline + max(k_boundHeightMargin+lowerBoundSize.height(), argumentSize.height() - m_argumentLayout->baseline())
);
}
ExpressionLayout * ProductLayout::child(uint16_t index) {
switch (index) {
case 0:
return m_upperBoundLayout;
case 1:
return m_lowerBoundLayout;
case 2:
return m_argumentLayout;
default:
return nullptr;
}
}
KDPoint ProductLayout::positionOfChild(ExpressionLayout * child) {
KDSize lowerBoundSize = m_lowerBoundLayout->size();
KDSize upperBoundSize = m_upperBoundLayout->size();
KDCoordinate x = 0;
KDCoordinate y = 0;
if (child == m_lowerBoundLayout) {
x = max(max(0, (k_symbolWidth-lowerBoundSize.width())/2), (upperBoundSize.width()-lowerBoundSize.width())/2);
y = m_baseline + k_boundHeightMargin;
} else if (child == m_upperBoundLayout) {
x = max(max(0, (k_symbolWidth-upperBoundSize.width())/2), (lowerBoundSize.width()-upperBoundSize.width())/2);
y = m_baseline - k_symbolHeight- k_boundHeightMargin-upperBoundSize.height();
} else if (child == m_argumentLayout) {
x = max(max(k_symbolWidth, lowerBoundSize.width()), upperBoundSize.width())+k_argumentWidthMargin;
y = m_baseline - m_argumentLayout->baseline();
} else {
assert(false);
}
return KDPoint(x,y);
}

27
poincare/src/layout/product_layout.h Normal file
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@@ -0,0 +1,27 @@
#ifndef POINCARE_PRODUCT_LAYOUT_H
#define POINCARE_PRODUCT_LAYOUT_H
#include <poincare/expression.h>
#include <poincare/expression_layout.h>
class ProductLayout : public ExpressionLayout {
public:
ProductLayout(ExpressionLayout * lowerBoundLayout, ExpressionLayout * upperBoundLayout, ExpressionLayout * argumentLayout);
~ProductLayout();
protected:
void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
KDSize computeSize() override;
ExpressionLayout * child(uint16_t index) override;
KDPoint positionOfChild(ExpressionLayout * child) override;
private:
constexpr static KDCoordinate k_symbolHeight = 15;
constexpr static KDCoordinate k_symbolWidth = 9;
constexpr static KDCoordinate k_boundHeightMargin = 2;
constexpr static KDCoordinate k_argumentWidthMargin = 2;
constexpr static KDCoordinate k_lineThickness = 1;
ExpressionLayout * m_lowerBoundLayout;
ExpressionLayout * m_upperBoundLayout;
ExpressionLayout * m_argumentLayout;
};
#endif