CanvasShape.hpp

Define simple shapes to draw on a canvas.

Canvas shapes can be defined in detail, describing how they modify a canvas.

Other, more specific actions defined here are: CanvasCircle CanvasRect

class CanvasShape : public CanvasAction 

#include <CanvasShape.hpp>

Define an arbitrary shape to draw on a canvas (base class)

Subclassed by CanvasCircle, CanvasClearRect, CanvasLine, CanvasMultiLine, CanvasPolygon, CanvasRect, CanvasText

Public Functions

inline CanvasShape(double _x, double _y, const std::string &fc = "", const std::string &lc = "", double lw = 1.0)

inline CanvasShape(Point _p, const std::string &fc = "", const std::string &lc = "", double lw = 1.0)

inline virtual ~CanvasShape()

inline void MoveTo(Point _p): Shift the position of this shape to a point.

inline void MoveTo(double _x, double _y): Shift the position of this shape to coordinates.

inline void SetLineWidth(double lw = 1.0): Setup details needed before drawing lines.

inline void SetFillColor(const std::string &color): Change the fill color of this shape.

inline void SetLineColor(const std::string &color): Change the stroke color of this shape.

inline void ApplyColor(): Actually change the color on screen.

Protected Attributes

Point p: Anchor point for this shape.

std::string fill_color: Internal color to fill shape with.

std::string line_color: Border color for shape.

double line_width: How wide should lines be?

class CanvasCircle : public CanvasShape 

#include <CanvasShape.hpp>

Track a circle shape to be drawn on a canvas.

Public Functions

inline CanvasCircle(double _x, double _y, double _r, const std::string &fc = "", const std::string &lc = "", double lw = 1.0)

inline CanvasCircle(Point _p, double _r, const std::string &fc = "", const std::string &lc = "", double lw = 1.0)

inline CanvasCircle(Circle circle, const std::string &fc = "", const std::string &lc = "", double lw = 1.0)

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Private Members

double radius: Circle radius.

class CanvasRect : public CanvasShape 

#include <CanvasShape.hpp>

Track a rectangle shape to be drawn on a canvas.

Public Functions

inline CanvasRect(Point _p, double _w, double _h, const std::string &fc = "", const std::string &lc = "")

inline CanvasRect(double _x, double _y, double _w, double _h, const std::string &fc = "", const std::string &lc = "")

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Private Members

double w: Rectangle width.

double h: Rectangle height.

class CanvasClearRect : public CanvasShape 

#include <CanvasShape.hpp>

Clear a rectangular area in a canvas.

Public Functions

inline CanvasClearRect(Point _p, double _w, double _h)

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Private Members

double w: Rectangle width.

double h: Rectangle height.

class CanvasPolygon : public CanvasShape 

#include <CanvasShape.hpp>

An arbitrary-sized polygon to be drawn on a canvas.

Public Functions

inline CanvasPolygon(const std::string &fc = "", const std::string &lc = "")

inline CanvasPolygon(const vector<Point> &p, const std::string &fc = "", const std::string &lc = "")

inline CanvasPolygon(Point _p, const std::string &fc = "", const std::string &lc = "")

inline CanvasPolygon(double _x, double _y, const std::string &fc = "", const std::string &lc = "")

inline CanvasPolygon &AddPoint(double x, double y)

inline CanvasPolygon &AddPoint(Point p)

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Private Members

vector<Point> points: Series of points defining the perimeter of the Polygon.

class CanvasLine : public CanvasShape 

#include <CanvasShape.hpp>

A line segment on the canvas.

Public Functions

inline CanvasLine(double _x1, double _y1, double _x2, double _y2, const std::string &lc = "", double lw = 1.0): Y-position for second point of line segment.

inline CanvasLine(Point p1, Point p2, const std::string &lc = "", double lw = 1.0)

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Private Members

double x2

double y2: X-position for second point of line segment.

class CanvasMultiLine : public CanvasShape 

#include <CanvasShape.hpp>

A whole series of line segments on the canvas. Currently not working…

Public Functions

inline CanvasMultiLine(double _x1, double _y1, const vector<Point> &_points, const std::string &lc = "", double lw = 1.0)

inline CanvasMultiLine(Point p1, const vector<Point> &_points, const std::string &lc = "", double lw = 1.0)

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Private Members

vector<Point> points

class CanvasText : public CanvasShape 

#include <CanvasShape.hpp>

Text to be written on a canvas.

Public Functions

inline CanvasText(Point p, const std::string &_text, const std::string &fc = "", const std::string &lc = "")

inline virtual void Apply(): Apply current action to emp_i.ctx.

inline void Center(bool c = true): Center this text.

inline bool GetCenter() const: Identify if text is centered.

inline virtual CanvasAction *Clone() const: Make a copy of the current action.

Protected Attributes

std::string text: Specific text to be written.

bool center: Should this text be centered (or is anchor on left side)?