expression_view.cpp
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#include <escher/expression_view.h>
using namespace Poincare;
ExpressionView::ExpressionView(float horizontalAlignment, float verticalAlignment,
KDColor textColor, KDColor backgroundColor) :
m_expressionLayout(nullptr),
m_horizontalAlignment(horizontalAlignment),
m_verticalAlignment(verticalAlignment),
m_textColor(textColor),
m_backgroundColor(backgroundColor),
m_horizontalMargin(0)
{
}
ExpressionLayout * ExpressionView::expressionLayout() const {
return m_expressionLayout;
}
void ExpressionView::setExpressionLayout(ExpressionLayout * expressionLayout) {
m_expressionLayout = expressionLayout;
markRectAsDirty(bounds());
}
void ExpressionView::setBackgroundColor(KDColor backgroundColor) {
if (m_backgroundColor != backgroundColor) {
m_backgroundColor = backgroundColor;
markRectAsDirty(bounds());
}
}
void ExpressionView::setTextColor(KDColor textColor) {
if (textColor != m_textColor) {
m_textColor = textColor;
markRectAsDirty(bounds());
}
}
void ExpressionView::setAlignment(float horizontalAlignment, float verticalAlignment) {
m_horizontalAlignment = horizontalAlignment;
m_verticalAlignment = verticalAlignment;
markRectAsDirty(bounds());
}
int ExpressionView::numberOfLayouts() const {
return m_expressionLayout->numberOfDescendants(true);
}
KDSize ExpressionView::minimalSizeForOptimalDisplay() const {
if (m_expressionLayout == nullptr) {
return KDSizeZero;
}
KDSize expressionSize = m_expressionLayout->size();
return KDSize(expressionSize.width() + 2*m_horizontalMargin, expressionSize.height());
}
KDPoint ExpressionView::drawingOrigin() const {
KDSize expressionSize = m_expressionLayout->size();
return KDPoint(m_horizontalMargin + m_horizontalAlignment*(m_frame.width() - 2*m_horizontalMargin - expressionSize.width()), max(0, (m_frame.height() - expressionSize.height())/2));
}
KDPoint ExpressionView::absoluteDrawingOrigin() const {
return drawingOrigin().translatedBy(m_frame.topLeft());
}
void ExpressionView::drawRect(KDContext * ctx, KDRect rect) const {
ctx->fillRect(rect, m_backgroundColor);
if (m_expressionLayout != nullptr) {
m_expressionLayout->draw(ctx, drawingOrigin(), m_textColor, m_backgroundColor);
}
}