qulogic/libgnt
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Make the combobox a tiny bit friendlier.
v2.7.3
2010-07-05, Sadrul Habib Chowdhury
ac8d8a62c098
Make the combobox a tiny bit friendlier.
Pressing the first letter of an item will now jump to that item (and
popup the dropdown first if necessary). Add some API in libgnt in the
process.
/**
* GNT - The GLib Ncurses Toolkit
*
* GNT is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include
"gntinternal.h"
#include
"gntcolors.h"
#include
"gntkeys.h"
#include
"gntslider.h"
#include
"gntstyle.h"
enum
{
SIG_VALUE_CHANGED
,
SIGS
,
};
static
guint
signals
[
SIGS
]
=
{
0
};
static
GntWidgetClass
*
parent_class
=
NULL
;
/* returns TRUE if the value was changed */
static
gboolean
sanitize_value
(
GntSlider
*
slider
)
{
if
(
slider
->
current
<
slider
->
min
)
slider
->
current
=
slider
->
min
;
else
if
(
slider
->
current
>
slider
->
max
)
slider
->
current
=
slider
->
max
;
else
return
FALSE
;
return
TRUE
;
}
static
void
redraw_slider
(
GntSlider
*
slider
)
{
GntWidget
*
widget
=
GNT_WIDGET
(
slider
);
if
(
GNT_WIDGET_IS_FLAG_SET
(
widget
,
GNT_WIDGET_MAPPED
))
gnt_widget_draw
(
widget
);
}
static
void
slider_value_changed
(
GntSlider
*
slider
)
{
g_signal_emit
(
slider
,
signals
[
SIG_VALUE_CHANGED
],
0
,
slider
->
current
);
}
static
void
gnt_slider_draw
(
GntWidget
*
widget
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
widget
);
int
attr
=
0
;
int
position
,
size
=
0
;
if
(
slider
->
vertical
)
size
=
widget
->
priv
.
height
;
else
size
=
widget
->
priv
.
width
;
if
(
gnt_widget_has_focus
(
widget
))
attr
|=
GNT_COLOR_HIGHLIGHT
;
else
attr
|=
GNT_COLOR_HIGHLIGHT_D
;
if
(
slider
->
max
!=
slider
->
min
)
position
=
((
size
-
1
)
*
(
slider
->
current
-
slider
->
min
))
/
(
slider
->
max
-
slider
->
min
);
else
position
=
0
;
if
(
slider
->
vertical
)
{
mvwvline
(
widget
->
window
,
size
-
position
,
0
,
ACS_VLINE
|
gnt_color_pair
(
GNT_COLOR_NORMAL
)
|
A_BOLD
,
position
);
mvwvline
(
widget
->
window
,
0
,
0
,
ACS_VLINE
|
gnt_color_pair
(
GNT_COLOR_NORMAL
),
size
-
position
);
}
else
{
mvwhline
(
widget
->
window
,
0
,
0
,
ACS_HLINE
|
gnt_color_pair
(
GNT_COLOR_NORMAL
)
|
A_BOLD
,
position
);
mvwhline
(
widget
->
window
,
0
,
position
,
ACS_HLINE
|
gnt_color_pair
(
GNT_COLOR_NORMAL
),
size
-
position
);
}
mvwaddch
(
widget
->
window
,
slider
->
vertical
?
(
size
-
position
-
1
)
:
0
,
slider
->
vertical
?
0
:
position
,
ACS_CKBOARD
|
gnt_color_pair
(
attr
));
}
static
void
gnt_slider_size_request
(
GntWidget
*
widget
)
{
if
(
GNT_SLIDER
(
widget
)
->
vertical
)
{
widget
->
priv
.
width
=
1
;
widget
->
priv
.
height
=
5
;
}
else
{
widget
->
priv
.
width
=
5
;
widget
->
priv
.
height
=
1
;
}
}
static
void
gnt_slider_map
(
GntWidget
*
widget
)
{
if
(
widget
->
priv
.
width
==
0
||
widget
->
priv
.
height
==
0
)
gnt_widget_size_request
(
widget
);
GNTDEBUG
;
}
static
gboolean
step_back
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_advance_step
(
slider
,
-1
);
return
TRUE
;
}
static
gboolean
small_step_back
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_set_value
(
slider
,
slider
->
current
-
slider
->
smallstep
);
return
TRUE
;
}
static
gboolean
large_step_back
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_set_value
(
slider
,
slider
->
current
-
slider
->
largestep
);
return
TRUE
;
}
static
gboolean
step_forward
(
GntBindable
*
bindable
,
GList
*
list
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_advance_step
(
slider
,
1
);
return
TRUE
;
}
static
gboolean
small_step_forward
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_set_value
(
slider
,
slider
->
current
+
slider
->
smallstep
);
return
TRUE
;
}
static
gboolean
large_step_forward
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_set_value
(
slider
,
slider
->
current
+
slider
->
largestep
);
return
TRUE
;
}
static
gboolean
move_min_value
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_set_value
(
slider
,
slider
->
min
);
return
TRUE
;
}
static
gboolean
move_max_value
(
GntBindable
*
bindable
,
GList
*
null
)
{
GntSlider
*
slider
=
GNT_SLIDER
(
bindable
);
gnt_slider_set_value
(
slider
,
slider
->
max
);
return
TRUE
;
}
static
void
gnt_slider_class_init
(
GntSliderClass
*
klass
)
{
GntBindableClass
*
bindable
=
GNT_BINDABLE_CLASS
(
klass
);
parent_class
=
GNT_WIDGET_CLASS
(
klass
);
parent_class
->
draw
=
gnt_slider_draw
;
parent_class
->
map
=
gnt_slider_map
;
parent_class
->
size_request
=
gnt_slider_size_request
;
klass
->
changed
=
NULL
;
signals
[
SIG_VALUE_CHANGED
]
=
g_signal_new
(
"changed"
,
G_TYPE_FROM_CLASS
(
klass
),
G_SIGNAL_RUN_LAST
,
G_STRUCT_OFFSET
(
GntSliderClass
,
changed
),
NULL
,
NULL
,
g_cclosure_marshal_VOID__INT
,
G_TYPE_NONE
,
1
,
G_TYPE_INT
);
gnt_bindable_class_register_action
(
bindable
,
"step-backward"
,
step_back
,
GNT_KEY_LEFT
,
NULL
);
gnt_bindable_register_binding
(
bindable
,
"step-backward"
,
GNT_KEY_DOWN
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"step-forward"
,
step_forward
,
GNT_KEY_RIGHT
,
NULL
);
gnt_bindable_register_binding
(
bindable
,
"step-forward"
,
GNT_KEY_UP
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"small-step-backward"
,
small_step_back
,
GNT_KEY_CTRL_LEFT
,
NULL
);
gnt_bindable_register_binding
(
bindable
,
"small-step-backward"
,
GNT_KEY_CTRL_DOWN
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"small-step-forward"
,
small_step_forward
,
GNT_KEY_CTRL_RIGHT
,
NULL
);
gnt_bindable_register_binding
(
bindable
,
"small-step-forward"
,
GNT_KEY_CTRL_UP
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"large-step-backward"
,
large_step_back
,
GNT_KEY_PGDOWN
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"large-step-forward"
,
large_step_forward
,
GNT_KEY_PGUP
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"min-value"
,
move_min_value
,
GNT_KEY_HOME
,
NULL
);
gnt_bindable_class_register_action
(
bindable
,
"max-value"
,
move_max_value
,
GNT_KEY_END
,
NULL
);
gnt_style_read_actions
(
G_OBJECT_CLASS_TYPE
(
klass
),
GNT_BINDABLE_CLASS
(
klass
));
}
static
void
gnt_slider_init
(
GTypeInstance
*
instance
,
gpointer
class
)
{
GntWidget
*
widget
=
GNT_WIDGET
(
instance
);
GNT_WIDGET_SET_FLAGS
(
widget
,
GNT_WIDGET_NO_SHADOW
|
GNT_WIDGET_NO_BORDER
|
GNT_WIDGET_CAN_TAKE_FOCUS
);
widget
->
priv
.
minw
=
1
;
widget
->
priv
.
minh
=
1
;
GNTDEBUG
;
}
/******************************************************************************
* GntSlider API
*****************************************************************************/
GType
gnt_slider_get_gtype
(
void
)
{
static
GType
type
=
0
;
if
(
type
==
0
)
{
static
const
GTypeInfo
info
=
{
sizeof
(
GntSliderClass
),
NULL
,
/* base_init */
NULL
,
/* base_finalize */
(
GClassInitFunc
)
gnt_slider_class_init
,
NULL
,
/* class_finalize */
NULL
,
/* class_data */
sizeof
(
GntSlider
),
0
,
/* n_preallocs */
gnt_slider_init
,
/* instance_init */
NULL
/* value_table */
};
type
=
g_type_register_static
(
GNT_TYPE_WIDGET
,
"GntSlider"
,
&
info
,
0
);
}
return
type
;
}
GntWidget
*
gnt_slider_new
(
gboolean
vertical
,
int
max
,
int
min
)
{
GntWidget
*
widget
=
g_object_new
(
GNT_TYPE_SLIDER
,
NULL
);
GntSlider
*
slider
=
GNT_SLIDER
(
widget
);
slider
->
vertical
=
vertical
;
if
(
vertical
)
{
GNT_WIDGET_SET_FLAGS
(
widget
,
GNT_WIDGET_GROW_Y
);
}
else
{
GNT_WIDGET_SET_FLAGS
(
widget
,
GNT_WIDGET_GROW_X
);
}
gnt_slider_set_range
(
slider
,
max
,
min
);
slider
->
step
=
1
;
return
widget
;
}
void
gnt_slider_set_value
(
GntSlider
*
slider
,
int
value
)
{
int
old
;
if
(
slider
->
current
==
value
)
return
;
old
=
slider
->
current
;
slider
->
current
=
value
;
sanitize_value
(
slider
);
if
(
old
==
slider
->
current
)
return
;
redraw_slider
(
slider
);
slider_value_changed
(
slider
);
}
int
gnt_slider_get_value
(
GntSlider
*
slider
)
{
return
slider
->
current
;
}
int
gnt_slider_advance_step
(
GntSlider
*
slider
,
int
steps
)
{
gnt_slider_set_value
(
slider
,
slider
->
current
+
steps
*
slider
->
step
);
return
slider
->
current
;
}
void
gnt_slider_set_step
(
GntSlider
*
slider
,
int
step
)
{
slider
->
step
=
step
;
}
void
gnt_slider_set_small_step
(
GntSlider
*
slider
,
int
step
)
{
slider
->
smallstep
=
step
;
}
void
gnt_slider_set_large_step
(
GntSlider
*
slider
,
int
step
)
{
slider
->
largestep
=
step
;
}
void
gnt_slider_set_range
(
GntSlider
*
slider
,
int
max
,
int
min
)
{
slider
->
max
=
MAX
(
max
,
min
);
slider
->
min
=
MIN
(
max
,
min
);
sanitize_value
(
slider
);
}
static
void
update_label
(
GntSlider
*
slider
,
int
current_value
,
GntLabel
*
label
)
{
char
value
[
256
];
g_snprintf
(
value
,
sizeof
(
value
),
"%d/%d"
,
current_value
,
slider
->
max
);
gnt_label_set_text
(
label
,
value
);
}
void
gnt_slider_reflect_label
(
GntSlider
*
slider
,
GntLabel
*
label
)
{
g_signal_connect
(
G_OBJECT
(
slider
),
"changed"
,
G_CALLBACK
(
update_label
),
label
);
}