meter.c

飞漫公司的minigui的1.6.8收费增值版本的demon等示例程序

/*
** $Id: meter.c,v 1.7 2005/02/18 08:30:52 lihong Exp $
**
** The gdi demo of minigui
**
** Copyright (C) 2004 Feynman Software.
**
** Create date: 2004/07/20
*/

#include "english_config.h"
#include "meter.h"
#include "math.h"


extern void GetPinPoint(POINT x1, POINT x2, double alfa, int width, int height, POINT *x3, POINT *x4, POINT *x5);
static gal_pixel m_colorTable[4];
static PLOGFONT logfont1;	// 显示文字字体
///*新增的全局静态变量*/
static HDC BackDc_Meter = 0;
static HDC BackDc_Sin = 0;
#define PT_NUM 45



///////////////////////////////////////////////////////////////////////////////
//// CMeter message handlers
//
void DrawMeterBackground(HDC pDC)
{	
	int iOnBand = 0;
	gal_pixel colorCaption;
	int temp1,temp2;
	int i;
	double dTickAngleRad, dstepTickDeg, dTemp;
	POINT m_pointBoundary[22], pointInner[22];
	RECT textrect;	
    char *text[5] = { "180","135","90","45","0"
    };
	
	colorCaption = RGB2Pixel(pDC , 255, 255, 255);
    SetBrushColor(pDC, colorCaption);
	FillBox(BackDc_Meter, 0, 0, 310, 175);
	//绘制圆盘边框
	for(iOnBand = 8; iOnBand > 0; iOnBand--)
	{	
		colorCaption = RGB2Pixel(pDC, 
			(96 - 255) *((float)iOnBand)/10 +255,
			(96 - 255) *((float)iOnBand)/10 +255,
			255);
		SetPenType(pDC, PT_SOLID);
		SetPenCapStyle(pDC, PT_CAP_ROUND);
		SetPenColor(pDC, colorCaption);
		SetPenWidth(pDC, iOnBand*2);	
		ArcEx(pDC, 7, 7, 273, 273, 0, 180 * 64);			
	}
	SetPenColor(pDC, PIXEL_black);
	// 绘制内圈	
	SetPenColor(pDC, PIXEL_yellow);
	SetPenWidth(pDC, 2);
	ArcEx(pDC, 30, 30, 230, 230, 0, 180 * 64);
	m_colorTable[0] = RGB2Pixel (pDC, 255, 255, 0);
	m_colorTable[1] = RGB2Pixel (pDC, 0, 255,   0);
	m_colorTable[2] = RGB2Pixel(pDC, 255,  0,   0);
	m_colorTable[3] = RGB2Pixel(pDC, 255,183, 34);
	SetPenWidth(pDC, 15);
    SetPenCapStyle(pDC, PT_CAP_BUTT);
	temp1 = 45 * 64;	
	for(i = 0; i < TABNUM; i++)
	{	
		SetPenColor(pDC, m_colorTable[i]);
		ArcEx(pDC, 22, 22, 244, 244, i * temp1, temp1);
	}
	
	dstepTickDeg = 9 * 4.0*atan(1.0)/180.0;
	for(i = 0; i <= 20; i++)
	{
		// 转换成弧度
		dTickAngleRad = (double)dstepTickDeg * i;	
		// 确定外圈坐标
		// 确定x坐标
		dTemp = 145 + (130) * cos(dTickAngleRad);
		m_pointBoundary[i].x = dTemp;
		// 确定y坐标
		dTemp = 145 - (130) * sin(dTickAngleRad);
		m_pointBoundary[i].y = dTemp;
		
		// 确定刻度点(主刻度和子刻度)
		//主刻度及文本标注点
		if(i % 5 == 0)
		{
			dTemp = 145 + 120 * cos(dTickAngleRad);
			pointInner[i].x = dTemp;
			dTemp = 145 - 120 * sin(dTickAngleRad);
			pointInner[i].y = dTemp;
		}
		// 子刻度
		else
		{
			dTemp = 145 + 125*cos(dTickAngleRad);
			pointInner[i].x = dTemp;
			dTemp = 145 - 125*sin(dTickAngleRad);
			pointInner[i].y = dTemp;
		}	
	}
	
	// 绘制刻度
    SetPenColor(pDC, PIXEL_black);
    SetPenWidth(pDC, 1);	
	for(i = 0; i <= 20; i++)
	{
		LineEx(pDC, m_pointBoundary[i].x, m_pointBoundary[i].y,
				pointInner[i].x, pointInner[i].y);
	}	
     
	//绘制字体
	for(i=0; i<= 4; i++)
	{	
		temp1 = (180 - i * 45);
		temp2 = (180 - i * 45) * 4.0 * atan(1.0)/180.0;
		if(i == 0)
		{
			textrect.left = 31;
            textrect.top = 136;
			textrect.right = textrect.left + 30;
            textrect.bottom = textrect.top + 30;
			DrawText(pDC, text[i], -1, &textrect, DT_TOP|DT_LEFT);
		}		
		else if(i == 1)
		{
			textrect.left = 70;
            textrect.top = 60;
			textrect.right = textrect.left + 30;
            textrect.bottom = textrect.top + 30;
			DrawText(pDC, text[i], -1, &textrect, DT_TOP|DT_LEFT);
		}
		else if(i == 2)
		{
			textrect.left = 142;
            textrect.top = 32;
			textrect.right = textrect.left + 30;
            textrect.bottom = textrect.top + 30;
			DrawText(pDC, text[i], -1, &textrect, DT_TOP|DT_LEFT);
		}
		else if(i == 3)
		{
			textrect.left = 212;
            textrect.top = 62;
			textrect.right = textrect.left + 30;
            textrect.bottom = textrect.top + 30;
			DrawText(pDC, text[i], -1, &textrect, DT_TOP|DT_LEFT);
		}
		
		else if(i == 4)
		{
			textrect.left = 249;
            textrect.top = 140;
			textrect.right = textrect.left + 30;
            textrect.bottom = textrect.top + 30;
			DrawText(pDC, text[i], -1, &textrect, DT_TOP|DT_LEFT);
		}
	}
}

void DrawNeedle(HDC hdc, int alfa)
{
	double dTemp ;
	POINT pt[5] ;	// 指针由四边形组成
	int x , y;
	dTemp = alfa * 4.0*atan(1.0)/180.0;
	x = 155 + 110 * cos(dTemp);
	y = 146 - 110 * sin(dTemp);
	
	// 计算角度并限定指针走的角度
	pt[0].x = 155;
	pt[0].y = 146;
	pt[1].x = x;
	pt[1].y = y;
	
	GetPinPoint(pt[0], pt[1], alfa, 6, 10, &pt[2], &pt[3], &pt[4]);
	SetBrushColor(hdc, PIXEL_lightgray);
	FillPolygon(hdc, &pt[1], 4);
	//LineEx(hdc, 155,146, x, y);

	SetPenColor(hdc, PIXEL_darkgray);
	SetPenWidth(hdc, 2);
	// 立体感处理
	if(alfa > 90)
	{
		
		LineEx(hdc, pt[1].x,pt[1].y, pt[2].x, pt[2].y);
		LineEx(hdc, pt[2].x,pt[2].y, pt[3].x, pt[3].y);		
	}
	else if(alfa != 90)
	{		
		LineEx(hdc, pt[3].x,pt[3].y, pt[4].x, pt[4].y);
		LineEx(hdc, pt[4].x,pt[4].y, pt[1].x, pt[1].y);
	}
}

void DrawNode(HDC hdc)
{
	int i;
    gal_pixel colorCaption;

	for(i = 4; i > 0; i--)
	{
		colorCaption = RGB2Pixel(hdc, 
			i * 60, i * 60, i * 60);
		SetBrushColor(hdc, colorCaption);
		FillCircle(hdc, 155, 146, i);
	}	
}


void meter_paint(HDC hdc, int alfa) 
{
 	char str[20];
	//绘制仪表盘
 	if(BackDc_Meter == 0)
 	{
 		//创建背景内存DC	
 		BackDc_Meter = CreateCompatibleDCEx(hdc, 310, 175);	
		DrawMeterBackground(BackDc_Meter);	
 	}		
 	BitBlt(BackDc_Meter, 0, 0, 310, 175, hdc, 10, 0, 0);
#ifdef MGDEMO_ENGLISH
	sprintf(str, "Current Angle:%d", alfa);
#else	
	sprintf(str, "当前的角度是:%d", alfa);
#endif
    TextOut(hdc, 110, 80, str);
 	DrawNeedle(hdc, alfa);
	DrawNode(hdc);	
}

void DrawSinBackground(HDC hdc, int alfa)
{
	int i,j;
	char str[5];	

	SetBrushColor(hdc, PIXEL_black);
	FillBox(hdc, 0, 0, 300, 170);	

	//绘制外框	
	SetPenColor(hdc, PIXEL_lightwhite);	
	//绘制坐标
	SetPenColor(hdc, PIXEL_red);
	//x
	LineEx(hdc, 10, 150, 295, 150);
	//箭头
    LineEx(hdc, 300, 150, 285, 145);
    LineEx(hdc, 300, 150, 285, 155);
	//y
	LineEx(hdc, 10, 10, 10, 150);
	//箭头
	LineEx(hdc, 10, 10, 5, 25);
    LineEx(hdc, 10, 10, 15, 25);

	SetBkColor (hdc, PIXEL_black);
	SetBkMode (hdc, BM_TRANSPARENT);
	SetTextColor (hdc, PIXEL_lightwhite);
    TextOut(hdc, 5, 0, "x");
	TextOut(hdc, 290, 155, "y");
    j = 0;
	for(i = 10; i < 295; i+=28)
	{
		LineEx(hdc, i, 150, i, 155);		
		if(i < 280)
		{
			snprintf(str, 5, "%d", j);
			TextOut(hdc, i - 2, 155, str);
		}		
		j ++;
	}
	SetPenColor(hdc, PIXEL_blue);
	SetPenDashes(hdc, 0, "\3\2", 2);
	SetPenType(hdc, PT_ON_OFF_DASH);
	for(i = 0; i < 5; i++)
	{
		LineEx(hdc, 10, (i * 30) + 10 , 280, (i * 30) + 10);
	}
}

void draw_sin(HDC hdc, int alfa)
{
	int i;
	double dTemp, dTemp1;
    int rx, ry;
	dTemp1 = 4.0*atan(1.0)/180.0;
    dTemp = alfa * dTemp1;

	//绘制仪表盘
	if(BackDc_Sin == 0)
	{
		//创建背景内存DC	
		BackDc_Sin = CreateCompatibleDCEx(hdc, 300, 170);
		DrawSinBackground(BackDc_Sin, alfa);
	}
	BitBlt(BackDc_Sin, 0, 0, 300, 170, hdc, 10, 2, 0);
	for(i = 10 ; i < 280; i++)
	{
		rx = i + 10;
		ry = 80 + 60 * sin(dTemp);		
		SetPixel(hdc, rx, ry, PIXEL_green);
		dTemp += dTemp1 * 4;
	}	
}

void release_meter(void)
{
	if(BackDc_Meter != 0)
	{
		DeleteMemDC(BackDc_Meter);
		BackDc_Meter = 0;
	}
}

void release_sin()
{
	if(BackDc_Sin != 0)
	{
		DeleteMemDC(BackDc_Sin);
		BackDc_Sin = 0;
	}
}