sum_graph_controller.h
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#ifndef SHARED_SUM_GRAPH_CONTROLLER_H
#define SHARED_SUM_GRAPH_CONTROLLER_H
#include <escher.h>
#include "function_graph_view.h"
#include "interactive_curve_view_range.h"
#include "vertical_cursor_view.h"
#include "curve_view_cursor.h"
#include "simple_interactive_curve_view_controller.h"
#include "function.h"
#include "text_field_delegate.h"
namespace Shared {
class SumGraphController : public SimpleInteractiveCurveViewController, public TextFieldDelegate {
public:
SumGraphController(Responder * parentResponder, FunctionGraphView * curveView, InteractiveCurveViewRange * range, CurveViewCursor * cursor, char sumSymbol);
void viewWillAppear() override;
void didEnterResponderChain(Responder * previousFirstResponder) override;
bool handleEvent(Ion::Events::Event event) override;
void setFunction(Function * function);
bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
bool textFieldDidAbortEditing(TextField * textField) override;
bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
protected:
virtual bool moveCursorHorizontallyToPosition(double position);
enum class Step {
FirstParameter = 0,
SecondParameter = 1,
Result = 2
};
Step m_step;
double m_startSum;
double m_endSum;
Function * m_function;
InteractiveCurveViewRange * m_graphRange;
private:
constexpr static float k_cursorTopMarginRatio = 0.06f; // (cursorHeight/2)/graphViewHeight
constexpr static float k_cursorBottomMarginRatio = 0.28f; // (cursorHeight/2+bannerHeigh)/graphViewHeight
virtual I18n::Message legendMessageAtStep(Step step) = 0;
virtual double cursorNextStep(double position, int direction) = 0;
virtual Poincare::ExpressionLayout * createFunctionLayout(const char * functionName) = 0;
Shared::InteractiveCurveViewRange * interactiveCurveViewRange() override { return m_graphRange; }
Shared::CurveView * curveView() override { return m_graphView; }
TextFieldDelegateApp * textFieldDelegateApp() override {
return static_cast<TextFieldDelegateApp *>(app());
}
bool handleEnter() override;
class LegendView : public View {
public:
LegendView(SumGraphController * controller, char sumSymbol);
~LegendView();
LegendView(const LegendView& other) = delete;
LegendView(LegendView&& other) = delete;
LegendView& operator=(const LegendView& other) = delete;
LegendView& operator=(LegendView&& other) = delete;
TextField * textField() { return &m_editableZone; }
KDSize minimalSizeForOptimalDisplay() const override;
void drawRect(KDContext * ctx, KDRect rect) const override;
void setLegendMessage(I18n::Message message, Step step);
void setEditableZone(double d);
void setSumSymbol(Step step, double start = NAN, double end = NAN, double result = NAN, Poincare::ExpressionLayout * sequenceName = nullptr);
private:
constexpr static KDCoordinate k_legendHeight = 35;
constexpr static KDCoordinate k_editableZoneWidth = 12*KDText::charSize(KDText::FontSize::Small).width();
constexpr static KDCoordinate k_editableZoneHeight = KDText::charSize(KDText::FontSize::Small).height();
constexpr static KDCoordinate k_symbolHeightMargin = 8;
constexpr static KDCoordinate k_sigmaHeight = 18;
int numberOfSubviews() const override;
View * subviewAtIndex(int index) override;
void layoutSubviews() override;
void layoutSubviews(Step step);
ExpressionView m_sum;
Poincare::ExpressionLayout * m_sumLayout;
MessageTextView m_legend;
TextField m_editableZone;
char m_draftText[TextField::maxBufferSize()];
char m_sumSymbol;
};
FunctionGraphView * m_graphView;
LegendView m_legendView;
VerticalCursorView m_cursorView;
};
}
#endif