output_expressions_view.cpp
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#include "output_expressions_view.h"
#include "scrollable_output_expressions_view.h"
#include "../i18n.h"
#include <assert.h>
using namespace Poincare;
namespace Calculation {
OutputExpressionsView::OutputExpressionsView(Responder * parentResponder) :
Responder(parentResponder),
m_approximateExpressionView(),
m_approximateSign(KDText::FontSize::Large, I18n::Message::AlmostEqual, 0.5f, 0.5f, Palette::GreyVeryDark),
m_exactExpressionView(),
m_selectedSubviewType(OutputExpressionsView::SubviewType::ExactOutput)
{
}
void OutputExpressionsView::setExpressions(ExpressionLayout ** expressionsLayout) {
m_approximateExpressionView.setExpression(expressionsLayout[0]);
m_exactExpressionView.setExpression(expressionsLayout[1]);
layoutSubviews();
}
void OutputExpressionsView::setEqualMessage(I18n::Message equalSignMessage) {
m_approximateSign.setMessage(equalSignMessage);
}
void OutputExpressionsView::setHighlighted(bool highlight) {
// Do not call HighlightCell::setHighlighted to avoid marking all cell as dirty
m_highlighted = highlight;
m_exactExpressionView.setBackgroundColor(backgroundColor());
m_approximateExpressionView.setBackgroundColor(backgroundColor());
if (highlight) {
if (m_selectedSubviewType == SubviewType::ExactOutput) {
m_exactExpressionView.setBackgroundColor(Palette::Select);
} else {
m_approximateExpressionView.setBackgroundColor(Palette::Select);
}
}
}
KDColor OutputExpressionsView::backgroundColor() const {
KDColor background = m_even ? Palette::WallScreen : KDColorWhite;
return background;
}
void OutputExpressionsView::reloadCell() {
setHighlighted(isHighlighted());
m_approximateSign.setBackgroundColor(backgroundColor());
if (numberOfSubviews() == 1) {
m_approximateExpressionView.setTextColor(KDColorBlack);
} else {
m_approximateExpressionView.setTextColor(Palette::GreyVeryDark);
}
layoutSubviews();
}
KDSize OutputExpressionsView::minimalSizeForOptimalDisplay() const {
KDSize approximateExpressionSize = m_approximateExpressionView.minimalSizeForOptimalDisplay();
if (numberOfSubviews() == 1) {
return approximateExpressionSize;
}
KDSize exactExpressionSize = m_exactExpressionView.minimalSizeForOptimalDisplay();
KDCoordinate exactBaseline = m_exactExpressionView.expressionLayout()->baseline();
KDCoordinate approximateBaseline = m_approximateExpressionView.expressionLayout()->baseline();
KDCoordinate height = max(exactBaseline, approximateBaseline) + max(exactExpressionSize.height()-exactBaseline, approximateExpressionSize.height()-approximateBaseline);
KDSize approximateSignSize = m_approximateSign.minimalSizeForOptimalDisplay();
return KDSize(exactExpressionSize.width()+approximateSignSize.width()+approximateExpressionSize.width()+2*k_digitHorizontalMargin, height);
}
void OutputExpressionsView::didBecomeFirstResponder() {
if (numberOfSubviews() == 1) {
setSelectedSubviewType(SubviewType::ApproximativeOutput);
} else {
setSelectedSubviewType(SubviewType::ExactOutput);
}
}
bool OutputExpressionsView::handleEvent(Ion::Events::Event event) {
if (numberOfSubviews() == 1) {
return false;
}
ScrollableOutputExpressionsView * scrollResponder = static_cast<ScrollableOutputExpressionsView *>(parentResponder());
KDCoordinate offset = scrollResponder->manualScrollingOffset().x();
bool rightExpressionIsVisible = minimalSizeForOptimalDisplay().width() - m_approximateExpressionView.minimalSizeForOptimalDisplay().width() - offset < scrollResponder->bounds().width()
;
bool leftExpressionIsVisible = m_exactExpressionView.minimalSizeForOptimalDisplay().width() - offset < scrollResponder->bounds().width();
if ((event == Ion::Events::Right && m_selectedSubviewType == SubviewType::ExactOutput && rightExpressionIsVisible) ||
(event == Ion::Events::Left && m_selectedSubviewType == SubviewType::ApproximativeOutput && leftExpressionIsVisible)) {
SubviewType otherSubviewType = m_selectedSubviewType == SubviewType::ExactOutput ? SubviewType::ApproximativeOutput : SubviewType::ExactOutput;
setSelectedSubviewType(otherSubviewType);
return true;
}
return false;
}
OutputExpressionsView::SubviewType OutputExpressionsView::selectedSubviewType() {
return m_selectedSubviewType;
}
void OutputExpressionsView::setSelectedSubviewType(OutputExpressionsView::SubviewType subviewType) {
m_selectedSubviewType = subviewType;
setHighlighted(isHighlighted());
}
int OutputExpressionsView::numberOfSubviews() const {
if (m_exactExpressionView.expressionLayout() != nullptr) {
return 3;
}
return 1;
}
View * OutputExpressionsView::subviewAtIndex(int index) {
View * views[3] = {&m_approximateExpressionView, &m_approximateSign, &m_exactExpressionView};
return views[index];
}
void OutputExpressionsView::layoutSubviews() {
KDCoordinate height = bounds().height();
KDSize approximateExpressionSize = m_approximateExpressionView.minimalSizeForOptimalDisplay();
if (numberOfSubviews() == 1) {
m_approximateExpressionView.setFrame(KDRect(0, 0, approximateExpressionSize.width(), height));
return;
}
KDCoordinate exactBaseline = m_exactExpressionView.expressionLayout()->baseline();
KDCoordinate approximateBaseline = m_approximateExpressionView.expressionLayout()->baseline();
KDCoordinate baseline = max(exactBaseline, approximateBaseline);
KDSize exactExpressionSize = m_exactExpressionView.minimalSizeForOptimalDisplay();
KDSize approximateSignSize = m_approximateSign.minimalSizeForOptimalDisplay();
m_exactExpressionView.setFrame(KDRect(0, baseline-exactBaseline, exactExpressionSize));
m_approximateExpressionView.setFrame(KDRect(2*k_digitHorizontalMargin+exactExpressionSize.width()+approximateSignSize.width(), baseline-approximateBaseline, approximateExpressionSize));
m_approximateSign.setFrame(KDRect(k_digitHorizontalMargin+exactExpressionSize.width(), baseline-approximateSignSize.height()/2, approximateSignSize));
}
}