rofi/source/scrollbar.c

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/**
* MIT/X11 License
* Modified (c) 2015 Qball Cow <qball@gmpclient.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#include <X11/X.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xmd.h>
#include <X11/Xutil.h>
#include <X11/Xproto.h>
#include <X11/Xft/Xft.h>
#include <glib.h>
#include "scrollbar.h"
#include "x11-helper.h"
extern Display *display;
scrollbar *scrollbar_create ( Window parent, XVisualInfo *vinfo, Colormap map,
short x, short y, short w, short h )
{
scrollbar *sb = g_malloc0 ( sizeof ( scrollbar ) );
sb->parent = parent;
sb->x = x;
sb->y = y;
sb->w = MAX ( 1, w );
sb->h = MAX ( 1, h );
sb->length = 10;
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sb->pos = 0;
sb->pos_length = 4;
XSetWindowAttributes attr;
attr.colormap = map;
attr.border_pixel = color_border ( display );
attr.background_pixel = color_background ( display );
sb->window = XCreateWindow ( display, sb->parent, sb->x, sb->y, sb->w, sb->h, 0, vinfo->depth,
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InputOutput, vinfo->visual, CWColormap | CWBorderPixel | CWBackPixel, &attr );
XSelectInput ( display, sb->window, ExposureMask | ButtonPressMask );
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sb->gc = XCreateGC ( display, sb->window, 0, 0 );
XSetForeground ( display, sb->gc, color_separator ( display ) );
//XSetFillStyle ( display, sb->gc, FillSolid);
// Create GC.
return sb;
}
void scrollbar_show ( scrollbar *sb )
{
XMapWindow ( display, sb->window );
}
void scrollbar_hide ( scrollbar *sb )
{
XUnmapWindow ( display, sb->window );
}
void scrollbar_free ( scrollbar *sb )
{
XFreeGC ( display, sb->gc );
XDestroyWindow ( display, sb->window );
g_free ( sb );
}
void scrollbar_set_length ( scrollbar *sb, unsigned int length )
{
sb->length = MAX ( 1, length );
}
void scrollbar_set_pos ( scrollbar *sb, unsigned int pos )
{
sb->pos = MIN ( sb->length, MAX ( 0, pos ) );
}
void scrollbar_set_pos_length ( scrollbar *sb, unsigned int pos_length )
{
sb->pos_length = MIN ( sb->length, MAX ( 1, pos_length ) );
}
void scrollbar_draw ( scrollbar *sb )
{
// Calculate position and size.
const short bh = sb->h - 2;
float sec = ( ( bh ) / (float) sb->length );
short height = sb->pos_length * sec;
short y = sb->pos * sec + 1;
// Set max pos.
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y = MIN ( y, bh - 2 );
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// Never go out of bar.
height = MAX ( 2, height );
// Cap length;
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height = MIN ( bh - y + 1, ( height ) );
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// Redraw base window
XClearWindow ( display, sb->window );
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// Paint the handle.
XFillRectangle ( display, sb->window, sb->gc, 1, y, sb->w, height );
}
unsigned int scrollbar_clicked ( scrollbar *sb, int y )
{
const short bh = sb->h - 2;
float sec = ( ( bh ) / (float) sb->length );
unsigned int sel = y / sec;
return sel;
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}