rofi  1.5.4
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
8  * a copy of this software and associated documentation files (the
9  * "Software"), to deal in the Software without restriction, including
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13  * the following conditions:
14  *
15  * The above copyright notice and this permission notice shall be
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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 }
_scrollbar
Definition: scrollbar.h:44
WIDGET
#define WIDGET(a)
Definition: widget.h:115
rofi_theme_get_color
void rofi_theme_get_color(const widget *widget, const char *property, cairo_t *d)
Definition: theme.c:677
_scrollbar::pos
unsigned int pos
Definition: scrollbar.h:47
scrollbar_scroll
static void scrollbar_scroll(scrollbar *sb, int y)
Definition: scrollbar.c:73
scrollbar_draw
static void scrollbar_draw(widget *, cairo_t *)
Definition: scrollbar.c:165
WIDGET_TRIGGER_ACTION_RESULT_GRAB_MOTION_END
@ WIDGET_TRIGGER_ACTION_RESULT_GRAB_MOTION_END
Definition: widget.h:86
scrollbar_get_desired_height
static int scrollbar_get_desired_height(widget *wid)
Definition: scrollbar.c:43
_scrollbar::pos_length
unsigned int pos_length
Definition: scrollbar.h:48
MOUSE_CLICK_UP
@ MOUSE_CLICK_UP
Definition: keyb.h:170
distance_get_pixel
int distance_get_pixel(RofiDistance d, RofiOrientation ori)
Definition: theme.c:765
_widget::get_desired_height
int(* get_desired_height)(struct _widget *)
Definition: widget-internal.h:81
rofi_theme_get_distance
RofiDistance rofi_theme_get_distance(const widget *widget, const char *property, int def)
Definition: theme.c:579
MOUSE_DCLICK_UP
@ MOUSE_DCLICK_UP
Definition: keyb.h:172
_scrollbar::widget
widget widget
Definition: scrollbar.h:45
scrollbar_trigger_action
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
MOUSE_CLICK_DOWN
@ MOUSE_CLICK_DOWN
Definition: keyb.h:169
scrollbar_create
scrollbar * scrollbar_create(widget *parent, const char *name)
Definition: scrollbar.c:102
widget_padding_get_remaining_height
int widget_padding_get_remaining_height(const widget *wid)
Definition: widget.c:545
widget_padding_get_remaining_width
int widget_padding_get_remaining_width(const widget *wid)
Definition: widget.c:538
listview.h
_widget::draw
void(* draw)(struct _widget *widget, cairo_t *draw)
Definition: widget-internal.h:72
WIDGET_TRIGGER_ACTION_RESULT_GRAB_MOTION_BEGIN
@ WIDGET_TRIGGER_ACTION_RESULT_GRAB_MOTION_BEGIN
Definition: widget.h:84
MouseBindingMouseDefaultAction
MouseBindingMouseDefaultAction
Definition: keyb.h:168
theme.h
_widget::free
void(* free)(struct _widget *widget)
Definition: widget-internal.h:92
WIDGET_TYPE_SCROLLBAR
@ WIDGET_TYPE_SCROLLBAR
Definition: widget.h:67
_widget::trigger_action
widget_trigger_action_cb trigger_action
Definition: widget-internal.h:87
_widget::y
short y
Definition: widget-internal.h:42
scrollbar_set_handle_length
void scrollbar_set_handle_length(scrollbar *sb, unsigned int pos_length)
Definition: scrollbar.c:146
_scrollbar::width
RofiDistance width
Definition: scrollbar.h:49
MOUSE_DCLICK_DOWN
@ MOUSE_DCLICK_DOWN
Definition: keyb.h:171
_widget::x
short x
Definition: widget-internal.h:40
widget_padding_get_top
int widget_padding_get_top(const widget *wid)
Definition: widget.c:517
_widget::parent
struct _widget * parent
Definition: widget-internal.h:64
_listview
Definition: listview.c:62
RofiDistance::distance
double distance
Definition: rofi-types.h:95
scrollbar_set_max_value
void scrollbar_set_max_value(scrollbar *sb, unsigned int max)
Definition: scrollbar.c:132
scrollbar_motion_notify
static gboolean scrollbar_motion_notify(widget *wid, G_GNUC_UNUSED gint x, gint y)
Definition: scrollbar.c:95
scrollbar_set_handle
void scrollbar_set_handle(scrollbar *sb, unsigned int pos)
Definition: scrollbar.c:139
_widget::h
short h
Definition: widget-internal.h:46
_widget::motion_notify
gboolean(* motion_notify)(struct _widget *, gint x, gint y)
Definition: widget-internal.h:79
widget_init
void widget_init(widget *wid, widget *parent, WidgetType type, const char *name)
Definition: widget.c:37
_widget::w
short w
Definition: widget-internal.h:44
_widget::border
RofiPadding border
Definition: widget-internal.h:54
RofiPadding::top
RofiDistance top
Definition: rofi-types.h:131
_scrollbar::length
unsigned int length
Definition: scrollbar.h:46
textbox.h
widget_padding_get_left
int widget_padding_get_left(const widget *wid)
Definition: widget.c:497
scrollbar_scroll_get_line
guint scrollbar_scroll_get_line(const scrollbar *sb, int y)
Definition: scrollbar.c:51
DEFAULT_SCROLLBAR_WIDTH
#define DEFAULT_SCROLLBAR_WIDTH
Definition: scrollbar.c:38
ROFI_ORIENTATION_HORIZONTAL
@ ROFI_ORIENTATION_HORIZONTAL
Definition: rofi-types.h:108
listview_set_selected
void listview_set_selected(listview *lv, unsigned int selected)
Definition: listview.c:411
scrollbar_free
static void scrollbar_free(widget *)
Definition: scrollbar.c:126
widget_padding_get_padding_width
int widget_padding_get_padding_width(const widget *wid)
Definition: widget.c:559
widget_padding_get_padding_height
int widget_padding_get_padding_height(const widget *wid)
Definition: widget.c:552
_widget
Definition: widget-internal.h:36
WidgetTriggerActionResult
WidgetTriggerActionResult
Definition: widget.h:78
scrollbar.h