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„ Z e d j o e ƒ n d S( s© Change Display
Demonstrates migrating a window between different displays and
screens. A display is a mouse and keyboard with some number of
associated monitors. A screen is a set of monitors grouped
into a single physical work area. The neat thing about having
multiple displays is that they can be on a completely separate
computers, as long as there is a network connection to the
computer where the application is running.
Only some of the windowing systems where GTK+ runs have the
concept of multiple displays and screens. (The X Window System
is the main example.) Other windowing systems can only
handle one keyboard and mouse, and combine all monitors into
a single screen.
This is a moderately complex example, and demonstrates:
- Tracking the currently open displays and screens
- Changing the screen for a window
- Letting the user choose a window by clicking on it
- Using GtkListStore and GtkTreeView
- Using GtkDialog
Ni c C s? | i ƒ d } | o | i ƒ } n | o
| i ƒ p d S( s@ Finds the toplevel window under the mouse pointer, if any.
i N( t displayt get_window_at_pointert pointer_windowt
get_user_datat widgett get_toplevelt None( R R R ( ( t+ /usr/lib64/pygtk/2.0/demos/changedisplay.pyt find_toplevel_at_pointer, s
t QueryForToplevelc B s) t Z d Z d „ Z d „ Z d „ Z RS( sÄ Asks the user to click on a window, then waits for them click
the mouse. When the mouse is released, returns the toplevel
window under the pointer, or NULL, if there is none.
c C s£ t i i | t i ƒ | i | ƒ | i t ƒ | i t i
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( t gtkt Windowt __init__t selft WINDOW_POPUPt
set_screent screent set_modalt Truet set_positiont WIN_POS_CENTERt Framet framet set_shadow_typet
SHADOW_OUTt addt Labelt promptt labelt set_paddingt show_all( R
R R R R ( ( R R ? s
c C sð | i ƒ i ƒ } t i i | t i i ƒ } t i
ƒ } t i i | i
t t i i d | ƒ t i i j oh t | _ | i d | i ƒ x" | i t j o | i t ƒ qŒ Wt | ƒ } | | j o
d } qÕ n | i ƒ t i i ƒ | S( Ns button-release-event( R
t
get_screent get_displayR R
t gdkt Cursort CROSSHAIRt cursort gobjectt main_context_defaultt main_contextt pointer_grabt windowt Falset BUTTON_RELEASE_MASKR t GRAB_SUCCESSt
query_clickedt connectt button_release_event_cbt iterationR R t toplevelt destroyt flush( R
R$ R1 R' R ( ( R t runO s "
c C s
t | _ t S( N( R R
R- ( R
t winreft event( ( R R/ i s ( t __name__t
__module__t __doc__R R4 R/ ( ( ( R R 9 s t LeftAlignButtonc B s t Z d Z d „ Z RS( s½ If we have a stack of buttons, it often looks better if their contents
are left-aligned, rather than centered. This class creates a button
and left-aligns it contents.
c C s7 t i i | | ƒ | i ƒ d } | i d d ƒ d S( Ni f0.0f0.5( R
t ButtonR R
R t get_childrent childt
set_alignment( R
R R= ( ( R R s s ( R7 R8 R9 R ( ( ( R R: n s t ChangeDisplayDemoc B sÈ t Z d Z d Z d Z d Z d Z d Z d d „ Z d „ Z
d „ Z d „ Z d „ Z
d „ Z d „ Z d „ Z d „ Z d
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„ Z d „ Z d „ Z d „ Z d „ Z RS( Nc C s> t i i | d | t i t i t i d t i f ƒ | i d d ƒ y | i
| i ƒ ƒ Wn& t j
o | i
d d „ ƒ n X| i
d | i ƒ | i
d | i ƒ t i t d ƒ } | i d ƒ | i i | t t d
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ƒ | i ƒ | i ƒ d S( Ns Change Screen or displayt Changei, i R2 c G s
t i ƒ S( N( R
t main_quit( t w( ( R t <lambda>Ž s t responsei i i ( R
t DialogR R
t parentt DIALOG_NO_SEPARATORt STOCK_CLOSEt RESPONSE_CLOSEt RESPONSE_OKt set_default_sizeR R t AttributeErrorR. t response_cbt
destroy_cbt VBoxR* t vboxt set_border_widtht
pack_startR t( _ChangeDisplayDemo__create_display_frameR t' _ChangeDisplayDemo__create_screen_framet' _ChangeDisplayDemo__initialize_displaysR ( R
RF RP R ( ( R R „ s&
c C sb t i i ƒ } | i ƒ } x | D] } | i | ƒ q" W| i d | i
ƒ } | i d | ƒ d S( sÄ Adds all currently open displays to our list of displays,
and set up a signal connection so that we'll be notified
when displays are opened in the future as well.
t display_openeds
user-callbackN(
R
R! t display_manager_gett managert
list_displayst displayst itemR
t add_displayR. t display_opened_cbt idt set_data( R
R[ RX RZ R^ ( ( R t __initialize_displays¡ s c C s3 t i | ƒ } t i t d ƒ } | i d ƒ | i | ƒ t i ƒ } | i t i t i
ƒ | i t i ƒ | i | t t d ƒ t i ƒ } | i t ƒ | i | ƒ | i ƒ } | i t i ƒ t i t d ƒ } | i | t t d ƒ | i d j o t i t i ƒ | _ n | i i | ƒ | | | f S( s This function is used both for creating the "Display" and
"Screen" frames, since they have a similar structure. The
caller hooks up the right context for the value returned
in tree_view, and packs any relevant buttons into button_vbox.
i i i N(! R
R t titleR t HBoxR* t hboxRQ R t ScrolledWindowt scrollwint
set_policyt POLICY_NEVERt POLICY_AUTOMATICR t SHADOW_INRR R t TreeViewt tree_viewt set_headers_visiblet
get_selectiont selectiont set_modet SELECTION_BROWSERO t button_vboxR
t
size_groupR t SizeGroupt SIZE_GROUP_HORIZONTALt
add_widget( R
Ra Rn Rq Rk Re R Rc ( ( R t __create_frame® s(
c C sõ | i d ƒ \ } } } t d ƒ } | i d | i ƒ | i | t
t
d ƒ t d ƒ } | i d | i ƒ | i | t
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t t ƒ | _ | i | i ƒ t i d t i ƒ d t ƒ} | i | ƒ | i ƒ } | i d | i ƒ | S(
s9 Creates the "Display" frame in the main window.
t Displays _Open...t clickedi t _Closet Namet textt changedN( R
t _ChangeDisplayDemo__create_frameR Rk Rq R: t buttonR. t open_display_cbRR R* t close_display_cbR
t ListStoret strt objectt
display_modelt set_modelt TreeViewColumnt CellRendererTextt DISPLAY_COLUMN_NAMEt columnt
append_columnRm Rn t display_changed_cb( R
R‰ R~ Rq Rk Rn R ( ( R t __create_display_frameÑ s
c C s‘ | i d ƒ \ } } } t i t t ƒ | _ | i
| i ƒ t i d t i ƒ d t
ƒ} | i | ƒ | i ƒ | _ | i i d | i ƒ | S( s8 Creates the "Screen" frame in the main window.
t Screent NumberR{ R| N( R
R} R Rk Rq R
R t intRƒ t screen_modelR… R† R‡ t SCREEN_COLUMN_NUMBERR‰ RŠ Rm t screen_selectionR. t screen_changed_cb( R
R‰ Rq Rk R ( ( R t __create_screen_frameê s
c C sY | i i ƒ } t | d ƒ i ƒ } | d j o | i | i ƒ n | i
ƒ i ƒ d S( s‚ Prompts the user for a toplevel window to move, and then moves
that window to the currently selected display
s4 Please select the toplevel
to move to the new screenN( R
R) R R R R4 R1 R R t current_screenR t beep( R
R1 R ( ( R t query_change_displayû s
c C s, | t i j o | i ƒ n | i ƒ d S( sÇ Called when the user clicks on a button in our dialog or
closes the dialog through the window manager. Unless the
"Change" button was clicked, we destroy the dialog.
N( t response_idR
RJ R
R— t dialogR2 ( R
R™ R˜ ( ( R RM
s c C sN t i d | t i t i t i t i t i f ƒ } | i t i ƒ t i
ƒ } | i t
ƒ t i d ƒ } | i i | ƒ | i i | ƒ | i ƒ | i ƒ d } x˜ | d j oŠ | i ƒ } | t i j o Pn | i d d ƒ } | GH| d j oA t i i | ƒ } | d j o d | f } | i | ƒ q;q¨ q¨ W| i ƒ d S( s¨ Called when the user clicks on "Open..." in the display
frame. Prompts for a new display, and then opens a connection
to that display.
s Open Displays) Please enter the name of
the new display
i iÿÿÿÿt s0 Can't open display :
%s
please try another one
N( R
RE R
t DIALOG_MODALt STOCK_CANCELt RESPONSE_CANCELt STOCK_OKRJ R™ t set_default_responset Entryt
display_entryt set_activates_defaultR R t dialog_labelRP R t
grab_focusR R t resultR4 R˜ t get_charst new_screen_nameR! Rw t error_msgt set_textR2 ( R
R~ R¨ R¡ R˜ R¥ R™ R£ R§ ( ( R R s2 !
c C s | i o | i i ƒ n d S( s| Called when the user clicks on the "Close" button in the
"Display" frame. Closes the selected display.
N( R
t current_displayt close( R
R~ ( ( R R€ 8 s
c C sO | i ƒ \ } } | d j o | i | t ƒ | _ n
d | _ | i ƒ d S( s› Called when the selected row in the display list changes.
Updates info.current_display, then refills the list of
screens.
N(
Rn t get_selectedt modelt iterR t get_valuet DISPLAY_COLUMN_DISPLAYR
Rª t fill_screens( R
Rn R® R ( ( R R‹ @ s
c C s? | i ƒ \ } } | o | i | t ƒ | _ n
d | _ d S( sk Called when the selected row in the sceen list changes.
Updates info->current_screen.
N( Rn R¬ R R® t gett SCREEN_COLUMN_SCREENR
R• R ( R
Rn R® R ( ( R R“ L s
c C s) | i ƒ | d j o t i ƒ n d S( N( R
t destroy_infoRF R R
RA ( R
RF ( ( R RN V s
c C s© | i i ƒ | i d j oˆ | i i ƒ } xv t | ƒ D]d } | i i | ƒ } | i i ƒ } | i i
| t | t | ƒ | d j o | i i | ƒ q9 q9 Wn d S( s? Fills in the screen list based on the current display
i N( R
R t clearRª R t
get_n_screenst n_screenst ranget iR R t appendR® t setR‘ R³ R’ t select_iter( R
R¹ R· R® R ( ( R R± \ s
c C sh | i i ƒ } xR | oJ | i i | t ƒ } | | j o | i i | ƒ Pn | i i
ƒ } q Wd S( st Called when one of the currently open displays is closed.
Remove it from our list of displays.
N( R
R„ t get_iter_firstR® R¯ R° t tmp_displayR t infot removet iter_next( R
R t is_errorR¿ R® R¾ ( ( R t display_closed_cbk s
c C s` | i ƒ } | i i ƒ } | i i | t | t | ƒ | i
d | i ƒ } | i
d | ƒ d S( s« Adds a new display to our list of displays, and connects
to the "closed" signal so that we can remove it from the
list of displays again.
t closeds
user-callbackN( R t get_namet nameR
R„ Rº R® R» Rˆ R° R. RÃ R^ R_ ( R
R RÆ R® R^ ( ( R R\ w s c C s | i | ƒ d S( s- Called when a new display is opened
N( R
R\ R ( R
RX R ( ( R R] „ s c C sh t i i ƒ } | i ƒ } | i d ƒ } | i | ƒ x* | D]" } | i d ƒ } | i | ƒ q> Wd S( s‚ Cleans up when the toplevel is destroyed; we remove the
connections we use to track currently open displays.
s
user-callbackN(
R
R! RW RX RY RZ t get_dataR^ t
disconnectt tmp_list( R
RÉ RX RZ R^ ( ( R R´ ‰ s
( R7 R8 R Rr R„ R R’ Rª R• R RU R} RS RT R— RM R R€ R‹ R“ RN R± RÃ R\ R] R´ ( ( ( R R? | s.
#
$
c C s t ƒ t i ƒ d S( N( R? R
t main( ( ( R RÊ ˜ s t __main__( R9 R
R% R¸ Rˆ R° t DISPLAY_NUM_COLUMNSR‘ R³ t SCREEN_NUM_COLUMNSR R R R; R: RE R? RÊ R7 (
Rˆ RÊ R? RÍ R RÌ R: R
R³ R R% R‘ R° ( ( R t ? s
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