www.pudn.com > dos_gui.zip > CHECKBOX.CPP

// 1993 (c) ALL RIGHTS RESERVED 
// AUTHOR  BY XuYongYong 
 
/* 	checkbox.cpp 
*/ 
#include "checkbox.h" 
 
//////////////////////////////////////////////////////////////////////////// 
checkbox_class::checkbox_class (int ID,char *title_hotkey, 
	int left,int top,int width,int height ) 
	:	control_class(ID,title_hotkey,NORMAL,CHECKBOX, 
			left,top,width,height,UNPUSHED,PUSHED,UNPUSHED ) 
{ 
  int text_height=textheight(title); 
  int bar =bar_height *0.7; 
	title_pos_y =top  + (height-text_height)/2-2; 
	title_pos_x =left + (height); 
 
	SetRect (&box,left,top,left+bar,top+bar); 
	OffsetRect (&box,(height-bar)/2,(height-bar)/2 ); 
} 
 
/**************************************************************************/ 
void checkbox_class::draw () 
{   if ( status & INVISIBLE) return;    // INVISIBLE 
	setcolor (BLACK); 
	FrameRect(box); 
	control_class::draw (); 
} 
/**************************************************************************/ 
void checkbox_class::unselect ( ) 
{   setcolor (WHITE); 
	setlinestyle( DOTTED_LINE,1,NORM_WIDTH ); 
	rectangle (title_pos_x-2,title_pos_y+1,title_pos_x+textwidth (title)+2, 
		title_pos_y+textheight (title)+2 ); 
	setlinestyle( SOLID_LINE,1,NORM_WIDTH ); 
} 
/**************************************************************************/ 
 
int checkbox_class::control_change_value 
	(int new_value ) 
{   if (control_class::control_change_value(new_value)==TRUE) 
		return TRUE; 
	switch (new_value) { 
		case UNCHECKED: 
			setcolor (WHITE); 
			break; 
		case CHECKED: 
			setcolor (BLACK); 
			break; 
	} 
	line ( box.left,box.top,box.right,box.bottom ); 
	line ( box.left,box.bottom,box.right,box.top ); 
 
	current_value =new_value; 
	return TRUE; 
} 
 
/**************************************************************************/ 
int checkbox_class::key_pressed_handler	(int key_scan_num ) 
{ 
	switch (key_scan_num ) { 
		case SPACEKEY: 
			control_change_value 
				(1-current_value); 
			thequeue.SendMessage(ID, 
				CheckBoxValueChangedMSG,this); 
			return TRUE; 
		default:return control_class::key_pressed_handler (key_scan_num); 
 
	} 
} 
/**************************************************************************/ 
 
int checkbox_class::msg_handler(MSG& message) 
{ 
	switch (message.Action){ 
		case MouseLButtonDownMSG: 
			control_change_value 
				(1-current_value); 
			thequeue.SendMessage(ID, 
				CheckBoxValueChangedMSG,this); 
			return TRUE; 
		default:return control_class::msg_handler (message); 
	} 
}