menubar.cpp

金融pos机前台源码

/*******************************************************************************
	模  块:	菜单条.
	功  能:	能用光标移动选择菜单项并挂接 SubMenu.
	程序员:	雷中南.
	版  本:	v1.1
	时  间:	1999-05-10
*******************************************************************************/
#include <graphics.h>
#include <string.h>
#include "menubar.h"
#include "han.h"
#include "def.h"

//菜单横条所在的位置.
struct RECT MBRect={0,0,639,46};

//构造函数.
MenuBar::MenuBar(char *submenu[],int number)
		 :Object(MBRect)
{
	//记录菜单条上的名称.
	for(int i=0; i<number; i++)
		subMenu[i]=submenu[i];
	SetBkColor(7);

	//设置汉字颜色.
	han.Color = 0;

	//子菜单数量.
	SubMenuNumber = number;

	//子菜单焦点所在位置.
	SubMenuFocus = 0;
}

//显示子菜单上的文字.
void
MenuBar::ItemDraw()
{
	int Left=8;
	han.Color = 0;
	//按标准距离输出文本.
	for (int i=0; i<SubMenuNumber; i++)
	{
		han.Out(Left, Rect.Height/2-8, subMenu[i]);
		Left = Left + 8 + strlen(subMenu[i]) * 8;
	}
}

//运行菜单条.
void
MenuBar::DoIt()
{
	int Key;
	FocusDraw();
	for(;;)
	{
		//获取键盘.
		Key = GetKey();
		switch (Key)
		{
			//如果按左箭头.
			case KEY_LEFT:
				//跳到前一个菜单项.
				PrevItem();
				PutEvent(MN_PREVSUBMENU);
				return;
			//如果按右箭头.
			case KEY_RIGHT:
				//跳到下一个菜单项.
				NextItem();
				PutEvent(MN_NEXTSUBMENU);
				return;
			//按下回车键.
			case KEY_RETURN:
				PutEvent(MN_SUBCALL);
				return;
			//按下ESC键.
			case KEY_ESC:
				PutEvent(EV_QUIT);
				return;
		}
	}
}

//跳到下一个菜单项.
void
MenuBar::NextItem()
{
	//如果有子菜单:
	if(SubMenuNumber>0)
	{
		//如果当前子菜单为最后一项.
		if(SubMenuFocus < SubMenuNumber - 1)
		{
			//覆盖焦点.
			FocusRestore();
			//将当前子菜单改为下一项.
			SubMenuFocus++;
			//画焦点.
			FocusDraw();
		}
		else
		{
			//覆盖焦点.
			FocusRestore();
			//将当前子菜单改为第一项.
			SubMenuFocus = 0;
			//画焦点.
			FocusDraw();
		}
	}
}

//跳到前一个菜单项.
void
MenuBar::PrevItem()
{
	//如果有子菜单.
	if(SubMenuNumber>0)
	{
		//如果当前子菜单不是第一项的话:
		if(SubMenuFocus>0)
		{
			//覆盖焦点.
			FocusRestore();
			//将当前子菜单改为前一项.
			SubMenuFocus--;
			//画焦点.
			FocusDraw();
		}
		//如果当前子菜单是第一项的话:
		else
		{
			//覆盖焦点.
			FocusRestore();
			//将当前子菜单改为最后一项.
			SubMenuFocus = SubMenuNumber-1;
			//画焦点.
			FocusDraw();
		}
	}
}

//计算子菜单的菜单框的位置.
struct RECT
MenuBar::CalRect(char *submenu[], int number)
{
	struct RECT rect;
	int temp,BlockLeft=8,size=0;
	//根据菜单条的标题位置确定方框的左上角.
	for(temp=0; temp<SubMenuFocus; temp++)
	{
		BlockLeft=BlockLeft+strlen(subMenu[temp])*8+8;
	}
	rect.Left=BlockLeft;
	rect.Top=Rect.Height;
	//根据子菜单每一项的标题宽度确定方框的右下角.
	for(temp=0; temp<number; temp++)
	{
		if(size<strlen(submenu[temp])) size=strlen(submenu[temp]);
	}
	rect.Width=24+size*8;
	rect.Height=2 + number*24+4;
	//返回计算的结果.
	return rect;
}

//恢复菜单项.
//当焦点消失时调用它可恢复得到焦点前的情况.
void
MenuBar::FocusRestore()
{
	int temp,BlockLeft=8;
	//计算焦点的位置.
	for(temp=0; temp<SubMenuFocus; temp++)
	{
		BlockLeft=BlockLeft+strlen(subMenu[temp])*8+8;
	}
	//恢复背景.
	setfillstyle(SOLID_FILL,BackColor);
	bar(BlockLeft-4,
		Rect.Height/2-10,
		BlockLeft+strlen(subMenu[SubMenuFocus])*8+4,
		Rect.Height/2+10);
	//恢复菜单标题.
	han.Color = 0;
	han.Out(BlockLeft, Rect.Height/2-8, subMenu[SubMenuFocus]);
}

//画焦点.
void
MenuBar::FocusDraw()
{
	int temp,BlockLeft=8;
	//根据每一项的长度,计算当前焦点所在的屏幕位置.
	for(temp=0; temp<SubMenuFocus; temp++)
	{
		BlockLeft=BlockLeft+strlen(subMenu[temp])*8+8;
	}
	//画焦点方块.
	setfillstyle(SOLID_FILL,1);
	bar(BlockLeft-4,
		Rect.Height/2-10,
		BlockLeft+strlen(subMenu[SubMenuFocus])*8+4,
		Rect.Height/2+10);
	//画3d外围线.
	setcolor(15);
	line(BlockLeft-4, Rect.Height/2-10,BlockLeft+strlen(subMenu[SubMenuFocus])*8+4,Rect.Height/2-10);
	line(BlockLeft-4, Rect.Height/2-10,BlockLeft-4,Rect.Height/2+10);
	setcolor(8);
	line(BlockLeft-4,Rect.Height/2+10,BlockLeft+strlen(subMenu[SubMenuFocus])*8+4,Rect.Height/2+10);
	line(BlockLeft+strlen(subMenu[SubMenuFocus])*8+4,Rect.Height/2-10,BlockLeft+strlen(subMenu[SubMenuFocus])*8+4,Rect.Height/2+10);
	//输出高亮文本.
	temp=han.Color;
	han.Color=15;
	han.Out(BlockLeft, Rect.Height/2-8, subMenu[SubMenuFocus]);
	han.Color=temp;
}

//画菜单条.
void
MenuBar::Draw()
{
	//画基类对象.
	Object::Draw();
	//画3d边框线.
	setcolor(15);
	line(0, 0, Rect.Width, 0);
	line(0, 0, 0, Rect.Height);
	line(1, Rect.Height-1, Rect.Width-1, Rect.Height-1);
	line(Rect.Width-1, 1, Rect.Width-1, Rect.Height-1);
	setcolor(8);
	line(1, 1, Rect.Width-2, 1);
	line(1, 1, 1, Rect.Height-2);
	line(0, Rect.Height, Rect.Width, Rect.Height);
	line(Rect.Width, 0, Rect.Width, Rect.Height);
	//显示菜单标题.
	ItemDraw();
}