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/**
* MIT/X11 License
* Modified (c) 2015-2016 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 <xkbcommon/xkbcommon.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"
#include "settings.h"
extern Display *display;
scrollbar *scrollbar_create ( short x, short y, short w, short h )
{
scrollbar *sb = g_malloc0 ( sizeof ( scrollbar ) );
sb->widget.x = x;
sb->widget.y = y;
sb->widget.w = MAX ( 1, w );
sb->widget.h = MAX ( 1, h );
sb->length = 10;
sb->pos = 0;
sb->pos_length = 4;
// Create GC.
return sb;
}
void scrollbar_free ( scrollbar *sb )
{
if ( sb != NULL ) {
g_free ( sb );
}
}
void scrollbar_set_max_value ( scrollbar *sb, unsigned int max )
{
if ( sb != NULL ) {
sb->length = MAX ( 1u, max );
}
}
void scrollbar_set_handle ( scrollbar *sb, unsigned int pos )
{
if ( sb != NULL ) {
sb->pos = MIN ( sb->length, pos );
}
}
void scrollbar_set_handle_length ( scrollbar *sb, unsigned int pos_length )
{
if ( sb != NULL ) {
sb->pos_length = MIN ( sb->length, MAX ( 1u, pos_length ) );
}
}
void scrollbar_draw ( scrollbar *sb, cairo_t *draw )
{
if ( sb != NULL ) {
// Calculate position and size.
const short bh = sb->widget.h - 0;
float sec = ( ( bh ) / (float) sb->length );
short height = sb->pos_length * sec;
short y = sb->pos * sec;
// Set max pos.
y = MIN ( y, bh - 2 );
// Never go out of bar.
height = MAX ( 2, height );
// Cap length;
height = MIN ( bh - y + 1, ( height ) );
// Redraw base window
color_separator ( display, draw );
cairo_rectangle ( draw, sb->widget.x + config.line_margin, sb->widget.y + y, sb->widget.w - config.line_margin, height );
cairo_fill ( draw );
}
}
void scrollbar_resize ( scrollbar *sb, int w, int h )
{
if ( sb != NULL ) {
if ( h > 0 ) {
sb->widget.h = h;
}
if ( w > 0 ) {
sb->widget.w = w;
}
}
}
unsigned int scrollbar_clicked ( scrollbar *sb, int y )
{
if ( sb != NULL ) {
if ( y >= sb->widget.y && y < ( sb->widget.y + sb->widget.h ) ) {
y -= sb->widget.y;
y = MIN ( MAX ( 1, y ), sb->widget.h - 1 ) - 1;
const short bh = sb->widget.h - 2;
float sec = ( ( bh ) / (float) sb->length );
unsigned int sel = y / sec;
return MIN ( sel, sb->length - 1 );
}
}
return 0;
}
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