demotpdraw.c

基于嵌入式图形库microwindows的简单示例程序10例

/****************************************************************
**Microwindows 触摸屏画板演示程序 zhang kaohua 2003.12.3***********
**演示内容:构建一个按钮,触摸屏绘图.
*****************************************************************/
#define MWINCLUDECOLORS
#include <stdio.h>
#include <math.h>
#include"nano-X.h"

static GR_WINDOW_ID w;      //声明根窗口
static GR_GC_ID gc;         //声明根窗口绘图上下文
static GR_GC_ID gLine;     //
static GR_GC_ID gRect;
static GR_GC_ID gRound;
static GR_GC_ID gid;	    //声明按钮的绘图上下文 
static GR_GC_ID gb;     //cotext of the button when it had been putted.
static GR_GC_ID t;	    //声明欢迎词绘图上下文
static   GR_EVENT event;          //声明事件
static   GR_WINDOW_ID btLine;      //声明按钮窗口
static   GR_WINDOW_ID btRect;
static   GR_WINDOW_ID btRound;
static   GR_WINDOW_ID btClear;
static   GR_WINDOW_ID bt;
static   GR_WINDOW_ID we;
//static   GR_FONT_ID font;         //

void draw_main_win(GR_WINDOW_ID w,GR_GC_ID gc);
void draw_Error_win(char *arg[]);
void draw(GR_EVENT_BUTTON *bevent, GR_EVENT_MOUSE *mevent);
void drawLine();
void drawRect();
void drawRound();

static int i;  // point num
static int r;  //radius of round
static int width, height; //width and height of rectangle
static int flag;  //draw num
#define DRAWLINE 1
#define DRAWRECT 2
#define DRAWROUND 3
#define CLEAR 4
//#define LINEQUENE(x,mod)  ((++(x)) & ((mod) - 1))

typedef struct {
  int x;
  int y;
}COOR;
static COOR coor[2];

int main(int ac,char **av)
{
   i=0;
   flag=0;
   //done=1; 
   if (GrOpen()<0)
    {
     printf("Can't open graphics\n");
     exit(1);
    }

    //GrGetNextEvent(&event);
    w=GrNewWindow(GR_ROOT_WINDOW_ID,10,10,300,180,3,GREEN,BLUE);//
    gc=GrNewGC();//
    GrMapWindow(w);//
    
    draw_main_win(w,gc); 
      
   GrClose();
   return 0;

}

void draw_main_win(GR_WINDOW_ID w,GR_GC_ID gc)
{//draw main window
   
   /*w=GrNewWindow(GR_ROOT_WINDOW_ID,10,10,300,180,3,GREEN,BLUE);//实例化根窗口
   gc=GrNewGC();//实例化上下文
   GrMapWindow(w);//显示窗口
   GR_GC_ID gid; */
   /*编译为Native版时变量可在函数内设,但交叉编译时要在程序声明段设*/

   bt=GrNewWindow(GR_ROOT_WINDOW_ID,10,190,300,40,3,RED,BLUE);
   btLine=GrNewWindow(bt,2,5,65,30,0,RED,BLUE);
   btRect=GrNewWindow(bt,65,5,65,30,0,RED,BLUE);
   btRound=GrNewWindow(bt,170,5,65,30,0,RED,BLUE);
   btClear=GrNewWindow(bt,235,5,65,30,0,RED,BLUE);
   we=GrNewWindow(bt,135,15,30,20,2,YELLOW,BLUE);
   
   
   
   GrMapWindow(bt);
   GrMapWindow(btLine);
   GrMapWindow(btRect);
   GrMapWindow(btRound);
   GrMapWindow(btClear);
   GrMapWindow(we);
   
   //draw line button
   gid=GrNewGC();
   GrSetGCForeground(gid,GREEN);
   GrSetGCBackground(gid,WHITE);
   GrFillEllipse(btLine,gid,32,15,30,13);

   //draw rectangle button
   gid=GrNewGC();
   GrSetGCForeground(gid,GREEN);
   GrSetGCBackground(gid,WHITE);
   GrFillEllipse(btRect,gid,32,15,30,13);

   //draw round button
   gid=GrNewGC();
   GrSetGCForeground(gid,GREEN);
   GrSetGCBackground(gid,WHITE);
   GrFillEllipse(btRound,gid,32,15,30,13);

   //draw clear button
   gid=GrNewGC();
   GrSetGCForeground(gid,GREEN);
   GrSetGCBackground(gid,WHITE);
   GrFillEllipse(btClear,gid,32,15,30,13);

   //draw exit button
   GrSetGCForeground(gc,RED);
   GrSetGCBackground(gc,YELLOW);
   GrText(we,gc,2,15,"EXIT",-1,GR_TFASCII);
   
   //GR_GC_ID t;//为欢迎词选择字体颜色.
   t=GrNewGC();
   GrSetGCForeground(t,RED);
   GrSetGCBackground(t,GREEN);
   /*font=GrCreateFont("times.ttf",30,NULL);//为欢迎词设置字体
   GrSetGCFont(t,font);
   //GrText(w,t,75,35,"                               ",-1,GR_TFASCII);
   //GrText(w,t,60,35,"WELCOME TO BEIJING CHINA",-1,GR_TFASCII);
   */
   GrSetGCForeground(t,YELLOW);
   GrSetGCBackground(t,GREEN);
   GrText(btLine,t,23,20,"LINE",-1,GR_TFASCII);

   GrSetGCForeground(t,YELLOW);
   GrSetGCBackground(t,GREEN);
   GrText(btRect,t,18,20,"RECT",-1,GR_TFASCII);

   GrSetGCForeground(t,YELLOW);
   GrSetGCBackground(t,GREEN);
   GrText(btRound,t,15,20,"ROUND",-1,GR_TFASCII);

   GrSetGCForeground(t,YELLOW);
   GrSetGCBackground(t,GREEN);
   GrText(btClear,t,15,20,"CLEAR",-1,GR_TFASCII);

   //为个窗口(按钮)选择事件
   GrSelectEvents(btRect,GR_EVENT_MASK_EXPOSURE | GR_EVENT_MASK_BUTTON_DOWN | GR_EVENT_MASK_BUTTON_UP);
   GrSelectEvents(btRound,GR_EVENT_MASK_EXPOSURE | GR_EVENT_MASK_BUTTON_DOWN | GR_EVENT_MASK_BUTTON_UP);
   GrSelectEvents(btLine,GR_EVENT_MASK_EXPOSURE | GR_EVENT_MASK_BUTTON_DOWN | GR_EVENT_MASK_BUTTON_UP);
   GrSelectEvents(btClear,GR_EVENT_MASK_EXPOSURE | GR_EVENT_MASK_BUTTON_DOWN | GR_EVENT_MASK_BUTTON_UP);
   GrSelectEvents(w,GR_EVENT_MASK_BUTTON_UP |
     GR_EVENT_MASK_BUTTON_DOWN |
     GR_EVENT_MASK_MOUSE_ENTER |
		 GR_EVENT_MASK_MOUSE_EXIT |
		 GR_EVENT_MASK_MOUSE_MOTION |
		 GR_EVENT_MASK_CLOSE_REQ);
   GrSelectEvents(we,GR_EVENT_MASK_EXPOSURE | GR_EVENT_MASK_BUTTON_UP);

while(1)
{
  GrGetNextEvent(&event);
  switch(event.type)
  {
    case GR_EVENT_TYPE_BUTTON_DOWN:
    if(event.button.wid==btLine)
    {
    printf("drawline\n");
    flag=DRAWLINE;
    gLine=GrNewGC();
    GrSetGCForeground(gLine,RED);
    gb=GrNewGC();
    GrSetGCForeground(gb,GRAY);
    GrFillEllipse(btLine,gb,32,15,30,13);
    GrSetGCForeground(gb,GREEN);
    GrSetGCBackground(gb,GRAY);
    GrText(btLine,gb,23,20,"LINE",-1,GR_TFASCII);
    coor[0].x=coor[1].x=0;
    coor[0].y=coor[1].y=0;
    i=0;
    }
    //printf("drawline\n");
    if(event.button.wid==btRect)
    {
    printf("drawRectangle\n");
    flag=DRAWRECT;
    gRect=GrNewGC();
    GrSetGCForeground(gRect,YELLOW);
    gb=GrNewGC();
    GrSetGCForeground(gb,GRAY);
    GrFillEllipse(btRect,gb,32,15,30,13);
    GrSetGCForeground(gb,GREEN);
    GrSetGCBackground(gb,GRAY);
    GrText(btRect,gb,18,20,"RECT",-1,GR_TFASCII);
    coor[0].x=coor[1].x=0;
    coor[0].y=coor[1].y=0;
    i=0;
    //GrFillEllipse(btLamp,gLamp,25,25,22,22);
    //return;
    }
    if(event.button.wid==btRound)
    {
    printf("drawRound\n");
    flag=DRAWROUND;
    gRound=GrNewGC();
    GrSetGCForeground(gRound,BLUE);
    gb=GrNewGC();
    GrSetGCForeground(gb,GRAY);
    GrFillEllipse(btRound,gb,32,15,30,13);
    GrSetGCForeground(gb,GREEN);
    GrSetGCBackground(gb,GRAY);
    GrText(btRound,gb,15,20,"ROUND",-1,GR_TFASCII);
    coor[0].x=coor[1].x=0;
    coor[0].y=coor[1].y=0;
    i=0;
    }
    if(event.button.wid==btClear)
    {
    printf("drawClear\n");
    flag=CLEAR;
    gb=GrNewGC();
    GrSetGCForeground(gb,GRAY);
    GrFillEllipse(btClear,gb,32,15,30,13);
    GrSetGCForeground(gb,GREEN);
    GrSetGCBackground(gb,GRAY);
    GrText(btClear,gb,15,20,"CLEAR",-1,GR_TFASCII);
    GrFillRect(w,gb, 0, 0, 300, 180);
    coor[0].x=coor[1].x=0;
    coor[0].y=coor[1].y=0;
    i=0;
    //break;
    }
    if(event.button.wid==w)
    {
     printf("draw...\n");
     draw(&event.button, &event.mouse);
    }
    break;
    
    case GR_EVENT_TYPE_BUTTON_UP:
    if(event.button.wid==btLine)
    {
    //draw line button again
    gb=GrNewGC();
    GrSetGCForeground(gb,GREEN);
    GrFillEllipse(btLine,gb,32,15,30,13);
    t=GrNewGC();
    GrSetGCForeground(t,YELLOW);
    GrSetGCBackground(t,GREEN);
    GrText(btLine,t,23,20,"LINE",-1,GR_TFASCII);
    }
    //printf("drawline\n");
    if(event.button.wid==btRect)
    {
    //draw rectangle button again
    gb=GrNewGC();
    GrSetGCForeground(gb,GREEN);
    GrFillEllipse(btRect,gb,32,15,30,13);
    t=GrNewGC();
    GrSetGCForeground(t,YELLOW);
    GrSetGCBackground(t,GREEN);
    GrText(btRect,t,18,20,"RECT",-1,GR_TFASCII);
    }
    if(event.button.wid==btRound)
    {
    //draw round button again
    gb=GrNewGC();
    GrSetGCForeground(gb,GREEN);
    GrFillEllipse(btRound,gb,32,15,30,13);
    t=GrNewGC();
    GrSetGCForeground(t,YELLOW);
    GrSetGCBackground(t,GREEN);
    GrText(btRound,t,15,20,"ROUND",-1,GR_TFASCII);
    }
    if(event.button.wid==btClear)
    {
    printf("drawClear\n");
    flag=0;
    gb=GrNewGC();
    GrSetGCForeground(gb,GREEN);
    GrFillEllipse(btClear,gb,32,15,30,13);
    t=GrNewGC();
    GrSetGCForeground(t,YELLOW);
    GrSetGCBackground(t,GREEN);
    GrText(btClear,t,15,20,"CLEAR",-1,GR_TFASCII);
    coor[0].x=coor[1].x=0;
    coor[0].y=coor[1].y=0;
    i=0;
    }
    if (event.button.wid==we)
      {
		    GrClose();
		    exit(0);
      }
    break;    
  }
 
}
  //return redo;        
}

void draw(GR_EVENT_BUTTON *bevent, GR_EVENT_MOUSE *mevent)
{   if(i<2)
    {
     //GrText(w,t,60,35,"                           ",-1,GR_TFASCII);
     if(mevent->buttons==GR_BUTTON_L)
      { 
        coor[i].x=bevent->x;
        coor[i].y=bevent->y;
        printf("draw...inw x%d=%d,y%d=%d\n,flag=%d\n",i,coor[i].x,i,coor[i].y,flag);
        i++;
      }
    if(event.mouse.buttons==GR_BUTTON_R)
      {
        coor[0].x=coor[1].x=0;
        coor[0].y=coor[1].y=0;
        printf("draw...inw x=%d,y=%d\n,flag=%d\n",coor[i].x,coor[i].y,flag);
        i=0;               
      }
    switch(flag)
       {
         case DRAWLINE: drawLine(); break;
         case DRAWRECT: drawRect(); break;
         case DRAWROUND: drawRound(); break;
       }
    }
    else
    {
      t=GrNewGC();
      GrSetGCForeground(t,RED);
      GrSetGCBackground(t,GREEN);
      //GrText(w,t,60,35,"                               ",-1,GR_TFASCII);
      //GrText(w,t,60,35,"Please select one type to draw!",-1,GR_TFASCII);
    }
    return;
}

void drawLine()
{
  if(i>1)//(coor[0].x!=0)&&(coor[0].y!=0)&&(coor[1].x!=0)&&(coor[1].y!=0))
    {
      GrLine(w,gLine,coor[0].x, coor[0].y, coor[i-1].x, coor[i-1].y);
      coor[0].x=coor[i-1].x; coor[0].y=coor[i-1].y;
      i--;
      printf("drawline...\n");
    }
  
}

void drawRect()
{
  if(i>1)
  {
    i=0;
    width=coor[1].x-coor[0].x; height=coor[1].y-coor[0].y;
    GrRect(w,gRect ,coor[0].x, coor[0].y, width, height);
    printf("drawRect:x1=%d,y1=%d,x2=%d,y2=%d\n",coor[0].x,coor[0].y,coor[1].x,coor[1].y);
  }
}

void drawRound()
{
	int x=coor[1].x-coor[0].x;
	int y=coor[1].y-coor[0].y;	  
  	if(i>1)
  	{
    	i=0;
    	r=sqrt(x*x+y*y);
    	GrEllipse(w,gRound,coor[0].x, coor[0].y, r, r);
    	printf("drawRound: x=%d,y=%d,r=%d\n",coor[0].x,coor[0].y,r);
  	}
}

void draw_Error_win(char *arg[])
{
  GR_WINDOW_ID winError;
  winError=GrNewWindow(w,20,100,400,300,1,WHITE,BLUE);
}