106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
|
/**
|
||
|
|
* \file
|
||
|
|
* Copyright 2004, 2006 Develer S.r.l. (http://www.develer.com/)
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* \brief Graphics user interface element to display a level bar.
|
||
|
|
*
|
||
|
|
* \author Stefano Fedrigo <aleph@develer.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "levelbar.h"
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Initialize the LevelBar widget with the bitmap associated,
|
||
|
|
* the value range and the coordinates in the bitmap.
|
||
|
|
* \note The levelbar should be at least 5 pixels wide and high
|
||
|
|
* for correct borders drawing. No check is done on this.
|
||
|
|
*/
|
||
|
|
void lbar_init(struct LevelBar *lb, struct Bitmap *bmp, int type, int min, int max, int pos,
|
||
|
|
coord_t x1, coord_t y1, coord_t x2, coord_t y2)
|
||
|
|
{
|
||
|
|
lb->bitmap = bmp;
|
||
|
|
lb->type = type;
|
||
|
|
lb->min = min;
|
||
|
|
lb->max = max;
|
||
|
|
lb->pos = pos;
|
||
|
|
lb->x1 = x1;
|
||
|
|
lb->y1 = y1;
|
||
|
|
lb->x2 = x2;
|
||
|
|
lb->y2 = y2;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set the level.
|
||
|
|
*/
|
||
|
|
void lbar_setLevel(struct LevelBar *lb, int level)
|
||
|
|
{
|
||
|
|
if (level < lb->min)
|
||
|
|
level = lb->min;
|
||
|
|
if (level > lb->max)
|
||
|
|
level = lb->max;
|
||
|
|
|
||
|
|
lb->pos = level;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get current level.
|
||
|
|
*/
|
||
|
|
int lbar_getLevel(struct LevelBar *lb)
|
||
|
|
{
|
||
|
|
return lb->pos;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Change level with respect to previous value
|
||
|
|
* (delta can be negative).
|
||
|
|
*/
|
||
|
|
void lbar_changeLevel(struct LevelBar *lb, int delta)
|
||
|
|
{
|
||
|
|
lbar_setLevel(lb, lb->pos + delta);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Change the top limit.
|
||
|
|
*/
|
||
|
|
void lbar_setMax(struct LevelBar *lb, int max)
|
||
|
|
{
|
||
|
|
lb->max = max;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Render the LevelBar on the bitmap.
|
||
|
|
*/
|
||
|
|
void lbar_draw(struct LevelBar *lb)
|
||
|
|
{
|
||
|
|
#define BORDERW 1
|
||
|
|
#define BORDERH 1
|
||
|
|
|
||
|
|
/* Compute filled bar length in pixels */
|
||
|
|
int totlen = (lb->type & LBAR_HORIZONTAL) ? lb->x2 - lb->x1 - BORDERW*4 : lb->y2 - lb->y1 - BORDERH*4;
|
||
|
|
int range = lb->max - lb->min;
|
||
|
|
int barlen = ((long)(lb->pos - lb->min) * (long)totlen + range - 1) / range;
|
||
|
|
|
||
|
|
// Draw border
|
||
|
|
gfx_rectDraw(lb->bitmap, lb->x1, lb->y1, lb->x2, lb->y2);
|
||
|
|
|
||
|
|
// Clear inside
|
||
|
|
gfx_rectClear(lb->bitmap, lb->x1 + BORDERW, lb->y1 + BORDERH, lb->x2 - BORDERW, lb->y2 - BORDERH);
|
||
|
|
|
||
|
|
// Draw bar
|
||
|
|
if (lb->type & LBAR_HORIZONTAL)
|
||
|
|
gfx_rectFill(lb->bitmap,
|
||
|
|
lb->x1 + BORDERW*2, lb->y1 + BORDERH*2,
|
||
|
|
lb->x1 + BORDERW*2 + barlen, lb->y2 - BORDERH*2);
|
||
|
|
else
|
||
|
|
gfx_rectFill(lb->bitmap,
|
||
|
|
lb->x1 + BORDERW*2, lb->y2 - BORDERH*2 - barlen,
|
||
|
|
lb->x2 - BORDERW*2, lb->y2 - BORDERH*2);
|
||
|
|
}
|