rofi  1.5.2
scrollbar.c
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1 /*
2  * rofi
3  *
4  * MIT/X11 License
5  * Copyright © 2013-2017 Qball Cow <qball@gmpclient.org>
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining
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27 
28 #include <config.h>
29 #include <xkbcommon/xkbcommon.h>
30 #include <glib.h>
31 #include "widgets/textbox.h"
32 #include "widgets/listview.h"
33 #include "widgets/scrollbar.h"
34 
35 #include "theme.h"
36 
38 #define DEFAULT_SCROLLBAR_WIDTH 8
39 
40 static void scrollbar_draw ( widget *, cairo_t * );
41 static void scrollbar_free ( widget * );
42 
44 {
45  // Want height we are.
46  return wid->h;
47 }
48 
49 // TODO
50 // This should behave more like a real scrollbar.
51 guint scrollbar_scroll_get_line ( const scrollbar *sb, int y )
52 {
53  y -= sb->widget.border.top.distance;
54  if ( y < 0 ) {
55  return 0;
56  }
57 
58  if ( y > sb->widget.h ) {
59  return sb->length - 1;
60  }
61 
62  short r = ( sb->length * sb->widget.h ) / ( (double) ( sb->length + sb->pos_length ) );
63  short handle = sb->widget.h - r;
64  double sec = ( ( r ) / (double) ( sb->length - 1 ) );
65  short half_handle = handle / 2;
66  y -= half_handle;
67  y = MIN ( MAX ( 0, y ), sb->widget.h - 2 * half_handle );
68 
69  unsigned int sel = ( ( y ) / sec );
70  return MIN ( sel, sb->length - 1 );
71 }
72 
73 static void scrollbar_scroll ( scrollbar *sb, int y )
74 {
76 }
77 
78 static WidgetTriggerActionResult scrollbar_trigger_action ( widget *wid, MouseBindingMouseDefaultAction action, G_GNUC_UNUSED gint x, gint y, G_GNUC_UNUSED void *user_data )
79 {
80  scrollbar *sb = (scrollbar *) wid;
81  switch ( action )
82  {
83  case MOUSE_CLICK_DOWN:
85  case MOUSE_CLICK_UP:
86  scrollbar_scroll ( sb, y );
88  case MOUSE_DCLICK_DOWN:
89  case MOUSE_DCLICK_UP:
90  break;
91  }
92  return FALSE;
93 }
94 
95 static gboolean scrollbar_motion_notify ( widget *wid, G_GNUC_UNUSED gint x, gint y )
96 {
97  scrollbar *sb = (scrollbar *) wid;
98  scrollbar_scroll ( sb, y );
99  return TRUE;
100 }
101 
102 scrollbar *scrollbar_create ( widget *parent, const char *name )
103 {
104  scrollbar *sb = g_malloc0 ( sizeof ( scrollbar ) );
105  widget_init ( WIDGET ( sb ), parent, WIDGET_TYPE_SCROLLBAR, name );
106  sb->widget.x = 0;
107  sb->widget.y = 0;
108  sb->width = rofi_theme_get_distance ( WIDGET ( sb ), "handle-width", DEFAULT_SCROLLBAR_WIDTH );
110  sb->widget.w = widget_padding_get_padding_width ( WIDGET ( sb ) ) + width;
112 
113  sb->widget.draw = scrollbar_draw;
114  sb->widget.free = scrollbar_free;
118 
119  sb->length = 10;
120  sb->pos = 0;
121  sb->pos_length = 4;
122 
123  return sb;
124 }
125 
126 static void scrollbar_free ( widget *wid )
127 {
128  scrollbar *sb = (scrollbar *) wid;
129  g_free ( sb );
130 }
131 
132 void scrollbar_set_max_value ( scrollbar *sb, unsigned int max )
133 {
134  if ( sb != NULL ) {
135  sb->length = MAX ( 1u, max );
136  }
137 }
138 
139 void scrollbar_set_handle ( scrollbar *sb, unsigned int pos )
140 {
141  if ( sb != NULL ) {
142  sb->pos = MIN ( sb->length, pos );
143  }
144 }
145 
146 void scrollbar_set_handle_length ( scrollbar *sb, unsigned int pos_length )
147 {
148  if ( sb != NULL ) {
149  sb->pos_length = MIN ( sb->length, MAX ( 1u, pos_length ) );
150  }
151 }
152 
165 static void scrollbar_draw ( widget *wid, cairo_t *draw )
166 {
167  scrollbar *sb = (scrollbar *) wid;
168  unsigned int wh = widget_padding_get_remaining_height ( wid );
169  // Calculate position and size.
170  unsigned int r = ( sb->length * wh ) / ( (double) ( sb->length + sb->pos_length ) );
171  unsigned int handle = wid->h - r;
172  double sec = ( ( r ) / (double) ( sb->length - 1 ) );
173  unsigned int height = handle;
174  unsigned int y = sb->pos * sec;
175  // Set max pos.
176  y = MIN ( y, wh - handle );
177  // Never go out of bar.
178  height = MAX ( 2, height );
179  // Cap length;
180  rofi_theme_get_color ( WIDGET ( sb ), "handle-color", draw );
181 
182  cairo_rectangle ( draw,
183  widget_padding_get_left ( wid ),
184  widget_padding_get_top ( wid ) + y,
186  height );
187  cairo_fill ( draw );
188 }
void listview_set_selected(listview *lv, unsigned int selected)
Definition: listview.c:410
static WidgetTriggerActionResult scrollbar_trigger_action(widget *wid, MouseBindingMouseDefaultAction action, G_GNUC_UNUSED gint x, gint y, G_GNUC_UNUSED void *user_data)
Definition: scrollbar.c:78
MouseBindingMouseDefaultAction
Definition: keyb.h:166
double distance
Definition: rofi-types.h:95
void rofi_theme_get_color(const widget *widget, const char *property, cairo_t *d)
Definition: theme.c:648
int widget_padding_get_padding_width(const widget *wid)
Definition: widget.c:559
int widget_padding_get_top(const widget *wid)
Definition: widget.c:517
unsigned int pos_length
Definition: scrollbar.h:48
struct _widget * parent
void(* draw)(struct _widget *widget, cairo_t *draw)
RofiDistance rofi_theme_get_distance(const widget *widget, const char *property, int def)
Definition: theme.c:550
#define DEFAULT_SCROLLBAR_WIDTH
Definition: scrollbar.c:38
static int scrollbar_get_desired_height(widget *wid)
Definition: scrollbar.c:43
unsigned int length
Definition: scrollbar.h:46
scrollbar * scrollbar_create(widget *parent, const char *name)
Definition: scrollbar.c:102
void scrollbar_set_handle(scrollbar *sb, unsigned int pos)
Definition: scrollbar.c:139
guint scrollbar_scroll_get_line(const scrollbar *sb, int y)
Definition: scrollbar.c:51
widget_trigger_action_cb trigger_action
widget widget
Definition: scrollbar.h:45
void scrollbar_set_handle_length(scrollbar *sb, unsigned int pos_length)
Definition: scrollbar.c:146
static gboolean scrollbar_motion_notify(widget *wid, G_GNUC_UNUSED gint x, gint y)
Definition: scrollbar.c:95
int widget_padding_get_remaining_height(const widget *wid)
Definition: widget.c:545
void(* free)(struct _widget *widget)
int distance_get_pixel(RofiDistance d, RofiOrientation ori)
Definition: theme.c:736
RofiDistance width
Definition: scrollbar.h:49
unsigned int pos
Definition: scrollbar.h:47
WidgetTriggerActionResult
Definition: widget.h:77
#define WIDGET(a)
Definition: widget.h:115
void scrollbar_set_max_value(scrollbar *sb, unsigned int max)
Definition: scrollbar.c:132
int widget_padding_get_remaining_width(const widget *wid)
Definition: widget.c:538
void widget_init(widget *wid, widget *parent, WidgetType type, const char *name)
Definition: widget.c:37
static void scrollbar_draw(widget *, cairo_t *)
Definition: scrollbar.c:165
static void scrollbar_free(widget *)
Definition: scrollbar.c:126
int(* get_desired_height)(struct _widget *)
int widget_padding_get_padding_height(const widget *wid)
Definition: widget.c:552
RofiPadding border
static void scrollbar_scroll(scrollbar *sb, int y)
Definition: scrollbar.c:73
int widget_padding_get_left(const widget *wid)
Definition: widget.c:497
RofiDistance top
Definition: rofi-types.h:131
gboolean(* motion_notify)(struct _widget *, gint x, gint y)