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
"gntbox.h"
#include
"gntcombobox.h"
#include
"gnttree.h"
#include
"gntmarshal.h"
#include
"gntstyle.h"
#include
"gntutils.h"
#include
<string.h>
enum
{
SIG_SELECTION_CHANGED
,
SIGS
,
};
static
GntWidgetClass
*
parent_class
=
NULL
;
static
guint
signals
[
SIGS
]
=
{
0
};
static
void
(
*
widget_lost_focus
)(
GntWidget
*
widget
);
static
void
set_selection
(
GntComboBox
*
box
,
gpointer
key
)
{
if
(
box
->
selected
!=
key
)
{
/* XXX: make sure the key actually does exist */
gpointer
old
=
box
->
selected
;
box
->
selected
=
key
;
if
(
GNT_WIDGET
(
box
)
->
window
)
gnt_widget_draw
(
GNT_WIDGET
(
box
));
if
(
box
->
dropdown
)
gnt_tree_set_selected
(
GNT_TREE
(
box
->
dropdown
),
key
);
g_signal_emit
(
box
,
signals
[
SIG_SELECTION_CHANGED
],
0
,
old
,
key
);
}
}
static
void
hide_popup
(
GntComboBox
*
box
,
gboolean
set
)
{
gnt_widget_set_size
(
box
->
dropdown
,
box
->
dropdown
->
priv
.
width
-
1
,
box
->
dropdown
->
priv
.
height
);
if
(
set
)
set_selection
(
box
,
gnt_tree_get_selection_data
(
GNT_TREE
(
box
->
dropdown
)));
else
gnt_tree_set_selected
(
GNT_TREE
(
box
->
dropdown
),
box
->
selected
);
gnt_widget_hide
(
box
->
dropdown
->
parent
);
}
static
void
gnt_combo_box_draw
(
GntWidget
*
widget
)
{
GntComboBox
*
box
=
GNT_COMBO_BOX
(
widget
);
char
*
text
=
NULL
,
*
s
;
GntColorType
type
;
int
len
;
if
(
box
->
dropdown
&&
box
->
selected
)
text
=
gnt_tree_get_selection_text
(
GNT_TREE
(
box
->
dropdown
));
if
(
text
==
NULL
)
text
=
g_strdup
(
""
);
if
(
gnt_widget_has_focus
(
widget
))
type
=
GNT_COLOR_HIGHLIGHT
;
else
type
=
GNT_COLOR_NORMAL
;
wbkgdset
(
widget
->
window
,
'\0'
|
gnt_color_pair
(
type
));
s
=
(
char
*
)
gnt_util_onscreen_width_to_pointer
(
text
,
widget
->
priv
.
width
-
4
,
&
len
);
*
s
=
'\0'
;
mvwaddstr
(
widget
->
window
,
1
,
1
,
C_
(
text
));
whline
(
widget
->
window
,
' '
|
gnt_color_pair
(
type
),
widget
->
priv
.
width
-
4
-
len
);
mvwaddch
(
widget
->
window
,
1
,
widget
->
priv
.
width
-
3
,
ACS_VLINE
|
gnt_color_pair
(
GNT_COLOR_NORMAL
));
mvwaddch
(
widget
->
window
,
1
,
widget
->
priv
.
width
-
2
,
ACS_DARROW
|
gnt_color_pair
(
GNT_COLOR_NORMAL
));
wmove
(
widget
->
window
,
1
,
1
);
g_free
(
text
);
GNTDEBUG
;
}
static
void
gnt_combo_box_size_request
(
GntWidget
*
widget
)
{
if
(
!
GNT_WIDGET_IS_FLAG_SET
(
widget
,
GNT_WIDGET_MAPPED
))
{
GntWidget
*
dd
=
GNT_COMBO_BOX
(
widget
)
->
dropdown
;
gnt_widget_size_request
(
dd
);
widget
->
priv
.
height
=
3
;
/* For now, a combobox will have border */
widget
->
priv
.
width
=
MAX
(
10
,
dd
->
priv
.
width
+
2
);
}
}
static
void
gnt_combo_box_map
(
GntWidget
*
widget
)
{
if
(
widget
->
priv
.
width
==
0
||
widget
->
priv
.
height
==
0
)
gnt_widget_size_request
(
widget
);
GNTDEBUG
;
}
static
void
popup_dropdown
(
GntComboBox
*
box
)
{
GntWidget
*
widget
=
GNT_WIDGET
(
box
);
GntWidget
*
parent
=
box
->
dropdown
->
parent
;
int
height
=
g_list_length
(
GNT_TREE
(
box
->
dropdown
)
->
list
);
int
y
=
widget
->
priv
.
y
+
widget
->
priv
.
height
-
1
;
gnt_widget_set_size
(
box
->
dropdown
,
widget
->
priv
.
width
,
height
+
2
);
if
(
y
+
height
+
2
>=
getmaxy
(
stdscr
))
y
=
widget
->
priv
.
y
-
height
-
1
;
gnt_widget_set_position
(
parent
,
widget
->
priv
.
x
,
y
);
if
(
parent
->
window
)
{
mvwin
(
parent
->
window
,
y
,
widget
->
priv
.
x
);
wresize
(
parent
->
window
,
height
+
2
,
widget
->
priv
.
width
);
}
parent
->
priv
.
width
=
widget
->
priv
.
width
;
parent
->
priv
.
height
=
height
+
2
;
GNT_WIDGET_UNSET_FLAGS
(
parent
,
GNT_WIDGET_INVISIBLE
);
gnt_widget_draw
(
parent
);
}
static
gboolean
gnt_combo_box_key_pressed
(
GntWidget
*
widget
,
const
char
*
text
)
{
GntComboBox
*
box
=
GNT_COMBO_BOX
(
widget
);
gboolean
showing
=
!!
GNT_WIDGET_IS_FLAG_SET
(
box
->
dropdown
->
parent
,
GNT_WIDGET_MAPPED
);
if
(
showing
)
{
if
(
text
[
1
]
==
0
)
{
switch
(
text
[
0
])
{
case
'\r'
:
case
'\t'
:
case
'\n'
:
hide_popup
(
box
,
TRUE
);
return
TRUE
;
case
27
:
hide_popup
(
box
,
FALSE
);
return
TRUE
;
}
}
}
if
(
gnt_widget_key_pressed
(
box
->
dropdown
,
text
))
{
if
(
!
showing
)
popup_dropdown
(
box
);
return
TRUE
;
}
{
#define SEARCH_IN_RANGE(start, end) do { \
GntTreeRow *row; \
for (row = start; row != end; \
row = gnt_tree_row_get_next(tree, row)) { \
gpointer key = gnt_tree_row_get_key(tree, row); \
GList *list = gnt_tree_get_row_text_list(tree, key); \
gboolean found = FALSE; \
found = (list->data && g_ascii_strncasecmp(text, list->data, len) == 0); \
g_list_foreach(list, (GFunc)g_free, NULL); \
g_list_free(list); \
if (found) { \
if (!showing) \
popup_dropdown(box); \
gnt_tree_set_selected(tree, key); \
return TRUE; \
} \
} \
} while (0)
int
len
=
strlen
(
text
);
GntTree
*
tree
=
GNT_TREE
(
box
->
dropdown
);
GntTreeRow
*
current
=
tree
->
current
;
SEARCH_IN_RANGE
(
gnt_tree_row_get_next
(
tree
,
current
),
NULL
);
SEARCH_IN_RANGE
(
tree
->
top
,
current
);
#undef SEARCH_IN_RANGE
}
return
FALSE
;
}
static
void
gnt_combo_box_destroy
(
GntWidget
*
widget
)
{
gnt_widget_destroy
(
GNT_COMBO_BOX
(
widget
)
->
dropdown
->
parent
);
}
static
void
gnt_combo_box_lost_focus
(
GntWidget
*
widget
)
{
GntComboBox
*
combo
=
GNT_COMBO_BOX
(
widget
);
if
(
GNT_WIDGET_IS_FLAG_SET
(
combo
->
dropdown
->
parent
,
GNT_WIDGET_MAPPED
))
hide_popup
(
combo
,
FALSE
);
widget_lost_focus
(
widget
);
}
static
gboolean
gnt_combo_box_clicked
(
GntWidget
*
widget
,
GntMouseEvent
event
,
int
x
,
int
y
)
{
GntComboBox
*
box
=
GNT_COMBO_BOX
(
widget
);
gboolean
dshowing
=
GNT_WIDGET_IS_FLAG_SET
(
box
->
dropdown
->
parent
,
GNT_WIDGET_MAPPED
);
if
(
event
==
GNT_MOUSE_SCROLL_UP
)
{
if
(
dshowing
)
gnt_widget_key_pressed
(
box
->
dropdown
,
GNT_KEY_UP
);
}
else
if
(
event
==
GNT_MOUSE_SCROLL_DOWN
)
{
if
(
dshowing
)
gnt_widget_key_pressed
(
box
->
dropdown
,
GNT_KEY_DOWN
);
}
else
if
(
event
==
GNT_LEFT_MOUSE_DOWN
)
{
if
(
dshowing
)
{
hide_popup
(
box
,
TRUE
);
}
else
{
popup_dropdown
(
GNT_COMBO_BOX
(
widget
));
}
}
else
return
FALSE
;
return
TRUE
;
}
static
void
gnt_combo_box_size_changed
(
GntWidget
*
widget
,
int
oldw
,
int
oldh
)
{
GntComboBox
*
box
=
GNT_COMBO_BOX
(
widget
);
gnt_widget_set_size
(
box
->
dropdown
,
widget
->
priv
.
width
-
1
,
box
->
dropdown
->
priv
.
height
);
}
static
gboolean
dropdown_menu
(
GntBindable
*
b
,
GList
*
null
)
{
if
(
GNT_WIDGET_IS_FLAG_SET
(
GNT_COMBO_BOX
(
b
)
->
dropdown
->
parent
,
GNT_WIDGET_MAPPED
))
return
FALSE
;
popup_dropdown
(
GNT_COMBO_BOX
(
b
));
return
TRUE
;
}
static
void
gnt_combo_box_class_init
(
GntComboBoxClass
*
klass
)
{
GntBindableClass
*
bindable
=
GNT_BINDABLE_CLASS
(
klass
);
parent_class
=
GNT_WIDGET_CLASS
(
klass
);
parent_class
->
destroy
=
gnt_combo_box_destroy
;
parent_class
->
draw
=
gnt_combo_box_draw
;
parent_class
->
map
=
gnt_combo_box_map
;
parent_class
->
size_request
=
gnt_combo_box_size_request
;
parent_class
->
key_pressed
=
gnt_combo_box_key_pressed
;
parent_class
->
clicked
=
gnt_combo_box_clicked
;
parent_class
->
size_changed
=
gnt_combo_box_size_changed
;
widget_lost_focus
=
parent_class
->
lost_focus
;
parent_class
->
lost_focus
=
gnt_combo_box_lost_focus
;
signals
[
SIG_SELECTION_CHANGED
]
=
g_signal_new
(
"selection-changed"
,
G_TYPE_FROM_CLASS
(
klass
),
G_SIGNAL_RUN_LAST
,
0
,
NULL
,
NULL
,
gnt_closure_marshal_VOID__POINTER_POINTER
,
G_TYPE_NONE
,
2
,
G_TYPE_POINTER
,
G_TYPE_POINTER
);
gnt_bindable_class_register_action
(
bindable
,
"dropdown"
,
dropdown_menu
,
GNT_KEY_DOWN
,
NULL
);
gnt_bindable_register_binding
(
bindable
,
"dropdown"
,
GNT_KEY_UP
,
NULL
);
gnt_style_read_actions
(
G_OBJECT_CLASS_TYPE
(
klass
),
bindable
);
GNTDEBUG
;
}
static
void
gnt_combo_box_init
(
GTypeInstance
*
instance
,
gpointer
class
)
{
GntWidget
*
box
;
GntWidget
*
widget
=
GNT_WIDGET
(
instance
);
GntComboBox
*
combo
=
GNT_COMBO_BOX
(
instance
);
GNT_WIDGET_SET_FLAGS
(
GNT_WIDGET
(
instance
),
GNT_WIDGET_GROW_X
|
GNT_WIDGET_CAN_TAKE_FOCUS
|
GNT_WIDGET_NO_SHADOW
);
combo
->
dropdown
=
gnt_tree_new
();
box
=
gnt_box_new
(
FALSE
,
FALSE
);
GNT_WIDGET_SET_FLAGS
(
box
,
GNT_WIDGET_NO_SHADOW
|
GNT_WIDGET_NO_BORDER
|
GNT_WIDGET_TRANSIENT
);
gnt_box_set_pad
(
GNT_BOX
(
box
),
0
);
gnt_box_add_widget
(
GNT_BOX
(
box
),
combo
->
dropdown
);
widget
->
priv
.
minw
=
4
;
widget
->
priv
.
minh
=
3
;
GNTDEBUG
;
}
/******************************************************************************
* GntComboBox API
*****************************************************************************/
GType
gnt_combo_box_get_gtype
(
void
)
{
static
GType
type
=
0
;
if
(
type
==
0
)
{
static
const
GTypeInfo
info
=
{
sizeof
(
GntComboBoxClass
),
NULL
,
/* base_init */
NULL
,
/* base_finalize */
(
GClassInitFunc
)
gnt_combo_box_class_init
,
NULL
,
/* class_finalize */
NULL
,
/* class_data */
sizeof
(
GntComboBox
),
0
,
/* n_preallocs */
gnt_combo_box_init
,
/* instance_init */
NULL
/* value_table */
};
type
=
g_type_register_static
(
GNT_TYPE_WIDGET
,
"GntComboBox"
,
&
info
,
0
);
}
return
type
;
}
GntWidget
*
gnt_combo_box_new
()
{
GntWidget
*
widget
=
g_object_new
(
GNT_TYPE_COMBO_BOX
,
NULL
);
return
widget
;
}
void
gnt_combo_box_add_data
(
GntComboBox
*
box
,
gpointer
key
,
const
char
*
text
)
{
gnt_tree_add_row_last
(
GNT_TREE
(
box
->
dropdown
),
key
,
gnt_tree_create_row
(
GNT_TREE
(
box
->
dropdown
),
text
),
NULL
);
if
(
box
->
selected
==
NULL
)
set_selection
(
box
,
key
);
}
gpointer
gnt_combo_box_get_selected_data
(
GntComboBox
*
box
)
{
return
box
->
selected
;
}
void
gnt_combo_box_set_selected
(
GntComboBox
*
box
,
gpointer
key
)
{
set_selection
(
box
,
key
);
}
void
gnt_combo_box_remove
(
GntComboBox
*
box
,
gpointer
key
)
{
gnt_tree_remove
(
GNT_TREE
(
box
->
dropdown
),
key
);
if
(
box
->
selected
==
key
)
set_selection
(
box
,
NULL
);
}
void
gnt_combo_box_remove_all
(
GntComboBox
*
box
)
{
gnt_tree_remove_all
(
GNT_TREE
(
box
->
dropdown
));
set_selection
(
box
,
NULL
);
}