ccc_msw.h

BigC++的源码

#ifndef CCC_MSW_H
#define CCC_MSW_H

#include <string>

using namespace std;

#include <windows.h>

// avoid conflicts with Windows function names
#define Polygon CCC_WIN_Polygon
#define Ellipse CCC_WIN_Ellipse
#define Rectangle CCC_WIN_Rectangle

#include "ccc_shap.h"

/**
   A conduit to a display window.
*/
class GraphicWindow
{
public:
   /**
      Default constructor. Constructs a window with the standard 
      coordinate system with corners (-10, -10) and (10, 10).
   */
   GraphicWindow();
   /**
      Sets the coordinate system of this window.
      @param x1 the minimum x-value
      @param y1 the minimum y-value
      @param x2 the maximum x-value
      @param y2 the maximum y-value
   */
   void coord(double xmin, double ymin, double xmax, double ymax);
   /**
      Clears this window.
   */
   void clear();

   /**
      Displays a point on this window.
      @param p the point to display (as a small circle)
      @return a reference to this window
   */
   GraphicWindow& operator<<(Point p);
   /**
      Displays a circle on this window.
      @param c the circle to display
      @return a reference to this window
   */
   GraphicWindow& operator<<(Circle c);
   /**
      Displays a line on this window.
      @param s the line to display
      @return a reference to this window
   */
   GraphicWindow& operator<<(Line s);
   /**
      Displays a message on this window.
      @param t the message to display
      @return a reference to this window
   */
   GraphicWindow& operator<<(Message t);
   /**
      Prompts the user for a string.
      @param s the prompt text
      @return the string that the user entered.
   */
   string get_string(string out_string);
   /**
      Prompts the user for an integer.
      @param s the prompt text
      @return the number that the user entered
   */
   int get_int(const string& out_string);
   /**
      Prompts the user for a floating-point value.
      @param s the prompt text
      @return the number that the user entered
   */
   double get_double(const string& out_string);
   /**
      Prompts the user to click on a point.
      @param s the prompt text
      @return the point on which the user clicked.
   */
   Point get_mouse(string out_string);
   /**
      Opens the window.
      @param hwnd the window handle
      @param mainwin_hdc the device context for the main window
   */
   void open(HWND hwnd, HDC mainwin_hdc);
   /**
      Deallocates resources for this window.
   */
   void close();
   /**
      Repaints with the saved bitmap--use when resizing.
      @param ps a pointer to the PAINTSTRUCT in WinProc
   */
   void repaint(PAINTSTRUCT& ps);

private:
   /**
      Scales an x-coordinate from user to display coordinates.
      @param x a coordinate position in user coordinates
      @return the scaled coordinate
   */
   int user_to_disp_x(double x) const;
   /**
      Scales a y-coordinate from user to display coordinates.
      @param y a coordinate position in user coordinates
      @return the scaled coordinate
   */
   int user_to_disp_y(double y) const;
   /**
      Scales an x-coordinate from display to user coordinates.
      @param x a coordinate position in display coordinates
      @return the scaled coordinate
   */
   double disp_to_user_x(int x) const;
   /**
      Scales an y-coordinate from display to user coordinates.
      @param y a coordinate position in display coordinates
      @return the scaled coordinate
   */
   double disp_to_user_y(int y) const;

   /**
      Displays a prompt on the status line.
      @param s the prompt
   */
   void statusline_prompt(string s);

   /**
      Plots a point.
      @param x the x-coordinate of the point
      @param y the y-coordinate of the point
   */
   void point(double x, double y);
   /**
      Plots a line.
      @param xfrom the x-coordinate of the starting point
      @param yfrom the y-coordinate of the starting point
      @param xto the x-coordinate of the ending point
      @param yto the y-coordinate of the ending point
   */
   void line(double xfrom, double yfrom, double xto, double yto);
   /**
      Plots a line.
      @param x the x-coordinate of the center point
      @param y the y-coordinate of the center point
      @param rx the radius in x-direction
      @param ry the radius in y-direction
   */
   void ellipse(double x, double y, double ra, double rb);
   /**
      Plots text.
      @param t the text string
      @param x the x-coordinate of the top left corner point
      @param y the y-coordinate of the top left corner point
   */
   void text(string t, double x, double y);

   double _user_xmin; // the user's window's logical window coords
   double _user_xmax;
   double _user_ymin;
   double _user_ymax;
   int _disp_xmax; // the physical window dimension (in pixels)
   int _disp_ymax;

   HWND child_hwnd;
   HWND edit_hwnd;

   HDC _hdc; // device context to the display
   int _mlength; // length of text extent for message child window
   int _elength; // length of text extent for edit child window

   HDC _bitmap_hdc; // a long-lived device context
   HBITMAP _hbm, _hbm_saved; // handles to the created bitmap objects
   int _bitmap_xmax; // width of the bitmap (in bits)
   int _bitmap_ymax; // height of the bitmap (in bits)
};

extern GraphicWindow cwin;

#endif