MIDTERM PROJECT
East Valley College
// GUI Calculator
#include <iostream.h>
#include <conio.h>
#include <graphics.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>
// Window
#define TITLEBARHEIGHT 21
#define BORDERWIDTH 1
#define ADD 1
#define SUBTRACT 2
#define MULTIPLY 3
#define DIVIDE 4
int ButtonId;
enum bool{false,true};
enum BUTTON{MOUSE_NORMAL = 0,MOUSE_LBUTTON=1,MOUSE_RBUTTON=2,MOUSE_MBUTTON=4};
enum BUTTON_STATUS
{
BUTTON_STATUS_NORMAL,
BUTTON_STATUS_DOWN
};
class TextBox
{
private:
int Alignment;
int Left,Top,Width,Height;
char Caption[50];
public:
TextBox(int left, int top, int width, int height, char caption[],int Align);
void Draw();
void SetText(char text[]);
char *GetText();
void Clear();
};
CIS 205
TextBox::TextBox(int left, int top, int width, int height, char caption[],int Align)
{
Left = left;
Top = top;
Width = width;
Height = height;
strcpy(Caption,caption);
Alignment = Align;
}
void TextBox::Draw()
{
setfillstyle(SOLID_FILL,WHITE);
bar(Left,Top,Left+Width,Top+Height);
setcolor(DARKGRAY);
rectangle(Left,Top,Left+Width,Top+Height);
setcolor(BLACK);
settextjustify(Alignment,TOP_TEXT);
if(Alignment==LEFT_TEXT)
outtextxy(Left+2,Top+1+((Height/2)-(textheight(Caption)/2)),Caption);
else
if(Alignment==RIGHT_TEXT)
outtextxy(Left+Width-2,Top+1+((Height/2)-(textheight(Caption)/2)),Caption);
else
outtextxy(Left+(Width/2),Top+1+((Height/2)-(textheight(Caption)/2)),Caption);
}
void TextBox::SetText(char text[])
{
if (Left + textwidth(Caption) <= Left + Width - textwidth(" "))
{
strcat(Caption,text);
Draw();
}
}
char *TextBox::GetText()
{
return Caption;
}
void TextBox::Clear()
{
strcpy(Caption,"");
Draw();
}
class Button
{
private:
int Left,Top,Width,Height,ID;
char Caption[50];
BUTTON_STATUS btnStatus;
void MouseDown();
void MouseUp();
bool State;
public:
Button(int left, int top, int width, int height, char caption[], int Id);
void Draw();
void EnableClickHandler();
};
Button::Button(int left, int top, int width, int height, char caption[], int Id)
{
Left = left;
Top = top;
Width = width;
Height = height;
strcpy(Caption,caption);
ID = Id;
btnStatus = BUTTON_STATUS_NORMAL;
State = false;
}
void Button::Draw()
{
setfillstyle(SOLID_FILL,LIGHTGRAY);
bar(Left,Top,Left+Width,Top+Height);
setcolor(WHITE);
line(Left,Top,Left+Width,Top);
line(Left,Top,Left,Top+Height);
setcolor(BLACK);
line(Left+Width,Top,Left+Width,Top+Height);
line(Left,Top+Height,Left+Width,Top+Height);
settextjustify(LEFT_TEXT,TOP_TEXT);
setcolor(BLACK);
outtextxy(Left + (Width/2) - textwidth(Caption)/2 + 1,
Top + (Height/2) - textheight(Caption)/2 + 1, Caption);
}
void Button::MouseDown()
{
mouse.HideMouse();
setcolor(BLACK);
line(Left,Top,Left+Width,Top);
line(Left,Top,Left,Top+Height);
setcolor(WHITE);
line(Left+Width,Top,Left+Width,Top+Height);
line(Left,Top+Height,Left+Width,Top+Height);
mouse.ShowMouse();
}
void Button::MouseUp()
{
mouse.HideMouse();
setcolor(WHITE);
line(Left,Top,Left+Width,Top);
line(Left,Top,Left,Top+Height);
setcolor(BLACK);
line(Left+Width,Top,Left+Width,Top+Height);
line(Left,Top+Height,Left+Width,Top+Height);
mouse.ShowMouse();
}
void Button::EnableClickHandler()
{
if(State)
{
ButtonId = 0;
State = false;
return;
}
if( mouse.MouseInside(Left,Top,Left+Width,Top+Height) == 1)
{
if( mouse.GetButton() == MOUSE_LBUTTON)
{
MouseDown();
btnStatus = BUTTON_STATUS_DOWN;
}
else if(btnStatus == BUTTON_STATUS_DOWN &&
{
MouseUp();
ButtonId = ID;
btnStatus = BUTTON_STATUS_NORMAL;
State = true;
mouse.GetButton() == MOUSE_NORMAL)
}
}
}
class Window
{
private:
int Left,Top,Width,Height;
char Caption[50];
Button *CloseBtn;
public:
Window(int left, int top, int width, int height, char caption[]);
void JCLogo();
void Draw();
void EnableClickHandler();
};
Window::Window(int left, int top, int width, int height, char caption[])
{
Left = left;
Top = top;
Width = width;
Height = height;
strcpy(Caption,caption);
}
void Window::Draw()
{
setfillstyle(SOLID_FILL,LIGHTGRAY);
bar(Left,Top,Left+Width,Top+Height);
setcolor(WHITE);
line(Left,Top,Left+Width,Top);
line(Left,Top,Left,Top+Height);
setcolor(BLACK);
line(Left,Top+Height,Left+Width,Top+Height);
line(Left+Width,Top,Left+Width,Top+Height);
setfillstyle(SOLID_FILL,BLUE);
bar(Left+BORDERWIDTH,Top+BORDERWIDTH,
Left+Width-(BORDERWIDTH*2),Top+TITLEBARHEIGHT);
setcolor(WHITE);
settextjustify(LEFT_TEXT,TOP_TEXT);
outtextxy(Left+(BORDERWIDTH*2)+TITLEBARHEIGHT+2,Top+(BORDERWIDTH*2)+(TITLEBARHEIGHT/2)(textheight(Caption)/2),Caption);
CloseBtn = new Button(Left+Width-TITLEBARHEIGHT-1, Top+2,TITLEBARHEIGHT-2,
TITLEBARHEIGHT-2, "X", 9809);
CloseBtn->Draw();
JCLogo();
}
void Window::EnableClickHandler()
{
CloseBtn->EnableClickHandler();
if (ButtonId == 9809)
exit(0);
}
void main()
{
int gd=DETECT,gm,ch,errorcode;
double opr1 = 0,opr2 = 0,result = 0,d=0;
int Operation=0;
double temp;
char *chr,str[30];
int len;
int x = 160,y = 130;
int w = 50, h = 40;
char deci[]={"."};
char btn[][3]={"AC","/","X","<-","7","8","9","-",
"4","5","6","+","1","2","3","=","0",".","+/-"};
// initialize graphics and local variables
initgraph(&gd,&gm,"c://turboc3//bgi");
// read result of initialization
errorcode = graphresult();
if (errorcode != grOk)// an error occurred
{
cout<<"Graphics error :: "<<grapherrormsg(errorcode);
cout <<"\n press any key to halt: ";
getch();
exit(1);// terminate with an error code
}
mouse.InstallMouse();
/* Drawing a Calculator Window */
Window *pWindow = new Window(150,50,265,340,"Calculator");
pWindow->Draw();
/* Drawing Textbox */
TextBox *pTextBox = new TextBox(160,80,243,30,"",RIGHT_TEXT);
pTextBox->Draw();
/* Drawing Buttons */
Button *pButton[19];
for (int i = 0;i<19;i++)
{
if(i == 15)
h = 90;
else
h=40;
pButton[i] = new Button(x,y,w,h,btn[i],i+1);
pButton[i]->Draw();
x = x+65;
if(i == 3 || i == 7 || i==11 || i== 15)
{
y = y+50;
x = 160;
}
}
while(1){
mouse.ShowMouse(); // To show mouse
mouse.GetMouseStatus(); // To get position of mouse
// Enabling click event on close button in window
pWindow->EnableClickHandler();
// Enabling click event on buttons
for(int k = 0;k<19;k++)
pButton[k]->EnableClickHandler();
switch(ButtonId)
{
case 1: //AC
pTextBox->Clear();
d = 0;
opr1=0;
opr2=0;
result = 0;
Operation = 0;
break;
case 2: //Divide
opr1 = atof(pTextBox->GetText());
pTextBox->Clear();
Operation = DIVIDE;
d = 0;
break;
case 3: //Multiply
opr1 = atof(pTextBox->GetText());
pTextBox->Clear();
Operation = MULTIPLY;
d=0;
break;
case 4: //Backspace
strcpy(chr,pTextBox->GetText());
len=strlen(chr);
if(chr[len-2] == deci[0])
{
chr[len-1]=0;
chr[len-2]=0;
}
else
chr[len-1] = 0;
pTextBox->Clear();
pTextBox->SetText(chr);
break;
case 5: //7
pTextBox->SetText("7");
break;
case 6: //8
pTextBox->SetText("8");
break;
case 7: //9
pTextBox->SetText("9");
break;
case 8: // Subtraction
opr1 = atoi(pTextBox->GetText());
pTextBox->Clear();
Operation = SUBTRACT;
d=0;
break;
case 9: //4
pTextBox->SetText("4");
break;
case 10: //5
pTextBox->SetText("5");
break;
case 11: //6
pTextBox->SetText("6");
break;
case 12: //Addition
opr1 = atof(pTextBox->GetText());
pTextBox->Clear();
Operation = ADD;
d=0;
break;
case 13: //1
pTextBox->SetText("1");
break;
case 14: //2
pTextBox->SetText("2");
break;
case 15: //3
pTextBox->SetText("3");
break;
case 16: // Equal(=)
opr2 = atof(pTextBox->GetText());
switch(Operation)
{
case ADD:
result = opr1+opr2;
break;
case SUBTRACT:
result = opr1-opr2;
break;
case MULTIPLY:
result = opr1*opr2;
break;
case DIVIDE:
result = opr1/opr2;
break;
}
pTextBox->Clear();
pTextBox->SetText(gcvt(result,10,str));
opr1=0;
opr2=0;
result = 0;
Operation=0;
break;
case 17: //0
pTextBox->SetText("0");
break;
case 18: // Decimal(.)
if(d == 0)
{
d = 1;
pTextBox->SetText(".");
}
break;
case 19: //Plus & Minus (+/-)
temp = atof(pTextBox->GetText());
temp = temp* -1;
pTextBox->Clear();
pTextBox->SetText(gcvt(temp,10,str));
break;
}
while(kbhit()){
ch = getch();
if (ch == 27) //ESC key pressed
exit(0);
} }
}