电子量产工具——5.UI系统

电子量产工具——5.UI系统

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软件总框架

一、数据结构抽象

1.1 框架

1.2 代码 ui.h

ui.h

#ifndef _UI_H
#define _UI_H

#include 
#include 
#include 

#define BUTTON_DEFAULT_COLOR 0xff0000
#define BUTTON_PRESSED_COLOR 0x00ff00
#define BUTTON_TEXT_COLOR 0x000000

struct Button;

typedef int (*ONDRAW_FUNC)(struct Button *ptButton, PDispBuff ptDispBuff);
typedef int (*ONPRESSED_FUNC)(struct Button *ptButton, PDispBuff ptDispBuff, PInputEvent ptInputEvent);

typedef struct Button {
	char *name;
	int status;
	Region tRegion;
	ONDRAW_FUNC OnDraw;
	ONPRESSED_FUNC OnPressed;
}Button,*PButton;

void InitButton(PButton ptButton, char *name, PRegion ptRegion, ONDRAW_FUNC OnDraw, ONPRESSED_FUNC OnPressed);




#endif

二、按键编程

2.1 框架

2.2 代码 botton.c

botton.c

#include 


static int DefaultOnDraw(struct Button *ptButton, PDispBuff ptDispBuff)
{
	/* 绘制底色 */
	DrawRegion(&ptButton->tRegion, BUTTON_DEFAULT_COLOR);

	/* 居中写文字 */
	DrawTextInregionCentral(ptButton->name, &ptButton->tRegion, BUTTON_TEXT_COLOR);
	/* flush to lcd/web */
	FlushDisplayRegion(&ptButton->tRegion, ptDispBuff);

	return 0;
}

static int DefaultOnPressed(struct Button *ptButton, PDispBuff ptDispBuff, PInputEvent ptInputEvent)
{
	unsigned int dwColor = BUTTON_DEFAULT_COLOR;
	ptButton->status = !ptButton->status;
	if (ptButton->status)
		dwColor = BUTTON_PRESSED_COLOR;

	/* 绘制底色 */
	DrawRegion(&ptButton->tRegion, dwColor);

	/* 居中写文字 */
	DrawTextInregionCentral(ptButton->name, &ptButton->tRegion, BUTTON_TEXT_COLOR);
	/* flush to lcd/web */
	FlushDisplayRegion(&ptButton->tRegion, ptDispBuff);

	return 0;
}

void InitButton(PButton ptButton, char *name, PRegion ptRegion, ONDRAW_FUNC OnDraw, ONPRESSED_FUNC OnPressed)
{
	ptButton->status = 0;
	ptButton->name = name;
	ptButton->tRegion = *ptRegion;
	ptButton->OnDraw = OnDraw ? OnDraw : DefaultOnDraw;
	ptButton->OnPressed = OnPressed ? OnPressed : DefaultOnPressed;
}

2.3 代码 在disp_manager.c增加函数

void DrawTextInregionCentral(char *name, PRegion ptRegion, unsigned int dwColor)
{
	int n = strlen(name);
	int iFontSize = ptRegion->iWidth / n / 2;

	int iOriginX, iOriginY;
	int i = 0;
	int error;

	FontBitMap tFontBitMap;

	if(iFontSize > ptRegion->iHeigh)
		iFontSize = ptRegion->iHeigh;

	iOriginX = (ptRegion->iWidth - n * iFontSize)/2 + ptRegion->iLeftUpX;
	iOriginY = (ptRegion->iHeigh - iFontSize)/2 + iFontSize + ptRegion->iLeftUpY;
	
	SetFontSize(iFontSize);

	while (name[i])
	{
		/* get bitmap */
		tFontBitMap.iCurOriginX = iOriginX;
		tFontBitMap.iCurOriginY = iOriginY;
		error = GetFontBitMap(name[i], &tFontBitMap);
		if (error)
		{
			printf("SelectAndInitFont err\n");
			return ;
		}

		/* draw on buffer */		
		DrawFontBitMap(&tFontBitMap, dwColor);

		iOriginX = tFontBitMap.iNextOriginX;
		iOriginY = tFontBitMap.iNextOriginY;	
		i++;
	}
}

void DrawFontBitMap(PFontBitMap ptFontBitMap, unsigned int dwColor)
{
    int i, j, p, q;
	int x = ptFontBitMap->tRegion.iLeftUpX;
	int y = ptFontBitMap->tRegion.iLeftUpY;
    int x_max = x + ptFontBitMap->tRegion.iWidth;
    int y_max = y + ptFontBitMap->tRegion.iHeigh;
	int width = ptFontBitMap->tRegion.iWidth;
	unsigned char *buffer = ptFontBitMap->pucBuffer;

    //printf("x = %d, y = %d\n", x, y);

    for ( j = y, q = 0; j < y_max; j++, q++ )
    {
        for ( i = x, p = 0; i < x_max; i++, p++ )
        {
            if ( i < 0      || j < 0       ||
                i >= g_tDispBuff.iXres || j >= g_tDispBuff.iYres )
            continue;

            //image[j][i] |= bitmap->buffer[q * bitmap->width + p];
            if (buffer[q * width + p])
	            PutPixel(i, j, dwColor);
        }
    }
	
}

void DrawRegion(PRegion ptRegion, unsigned int dwColor)
{
	int x = ptRegion->iLeftUpX;
	int y = ptRegion->iLeftUpY;
	int width = ptRegion->iWidth;
	int iHeigh = ptRegion->iHeigh;

	int i, j;

	for (j = y; j < y + iHeigh; j++)
		{
			for (i = x; i < x + width; i++)
				{
					PutPixel(i, j, dwColor);
				}
		}
}

2.4 计算在LCD中 设计的按钮且 如何将文字显示在按钮正中间

三、测试代码 ui_test.c

ui_test.c

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include 
#include 
#include 

#define FONTDATAMAX 4096

static const unsigned char fontdata_8x16[FONTDATAMAX] = {

	/* 0 0x00 '^@' */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	
	...................
	...................	

	/* 255 0xff '' */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */
	0x00, /* 00000000 */

};

void lcd_put_ascii(int x, int y, unsigned char c)
{
	unsigned char *dots = (unsigned char *)&fontdata_8x16[c*16];
	int i, b;
	unsigned char byte;

	for (i = 0; i < 16; i++)
	{
		byte = dots[i];
		for (b = 7; b >= 0; b--)
		{
			if (byte & (1<<b))
			{
				/* show */
				PutPixel(x+7-b, y+i, 0xffffff); /* 白 */
			}
			else
			{
				/* hide */
				PutPixel(x+7-b, y+i, 0); /* 黑 */
			}
		}
	}
}

int main(int argc, char **argv)
{
	PDispBuff ptBuffer;
	int error;
	Button tButton;
	Region tRegion;

	if (argc != 2)
	{
		printf("Usage: %s \n", argv[0]);
		return -1;
	}
		
	DisplayInit();

	SelectDefaultDisplay("fb");

	InitDefaultDisplay();

	ptBuffer = GetDisplayBuffer();

	FontsRegister();
	
	error = SelectAndInitFont("freetype", argv[1]);
	if (error)
	{
		printf("SelectAndInitFont err\n");
		return -1;
	}

	tRegion.iLeftUpX = 100;
	tRegion.iLeftUpY = 100;
	tRegion.iWidth   = 200;
	tRegion.iHeigh   = 100;
	
	InitButton(&tButton, "test", &tRegion, NULL, NULL);
	tButton.OnDraw(&tButton, ptBuffer);
	while (1)
	{
		tButton.OnPressed(&tButton, ptBuffer, NULL);
		sleep(2);
	}
	return 0;	
}

四、总结

待写