全面分析IDC双线路实现技术方案

The SAP Toolbar control

General

Add methodAdd_button_group methodSet_button state method

Simple exampleAdvanced example
General
See also Set up event handling for controls for a general example of event handling
Note: To get a list of all icons, use program SHOWICON.
Add method
Adds a new button to the toolbar
CALL METHOD go_toolbar->add_button
EXPORTING fcode = 'EXIT' "Function Code for button
icon = icon_system_end "ICON name, You can use type pool ICON
is_disabled = ' ' "Disabled = X
butn_type = gc_button_normal "Type of button, see below
text = 'Exit' "Text on button
quickinfo = 'Exit program' "Quick info
is_checked = ' '. "Button selected

Toolbar button types used in method ADD_BUTTON:

Value	Constant	Meaning
0	cntb_btype_button	Button (normal)
1	cntb_btype_dropdown	Pushbutton with menu
2	cntb_btype_menu	Menu
3	cntb_btype_sep	Seperator
4	cntb_btype_group	Pushbutton group
5	cntb_btype_check	Checkbox
6		Menu entry

Add_button_group method
This method is used to add a list of buttons to the toolbar. The buttons are defined in a table of type TTB_BUTTON, and it can be filled witha button definitions using method fill_buttons_data_table of the cl_gui_toolbar class. The button group is added to the toolbar using method add_button_group of the toolbar object.
* 1. Declare a table for buttons
DATA: gi_button_group TYPE ttb_button.
* 2. Create buttons in button table
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = 'Disable'
* icon =
* DISABLED =
butn_type = cntb_btype_group
* TEXT =
* QUICKINFO =
* CHECKED =
changing
data_table = gi_button_group
* EXCEPTIONS
* CNTB_BTYPE_ERROR = 1
* others = 2
.
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table..... add more buttons to the table
*3. Add button group to toolbar
CALL METHOD go_toolbar->add_button_group
EXPORTING data_table = gi_button_group.
Set_button state method
Used to change the state of individual buttons at runtime. If the button should be removed, use the delete_button method.
CALL METHOD go_toolbar->set_button_state
EXPORTING
* ENABLED = 'X'
* CHECKED = ' '
fcode = "Note: This is the function code of the button that should be changed
* EXCEPTIONS
* CNTL_ERROR = 1
* CNTB_ERROR_FCODE = 2
* others = 3
.
Simple example
This example shows how to create a toolbar with a single Exit button, used to exit the program.
Steps:

Create a screen and add a custom container named TOOLBAR_CONTAINER

Code:
REPORT sapmz_hf_toolbar .
TYPE-POOLS: icon.
CLASS cls_event_handler DEFINITION DEFERRED.
* G L O B A L D A T A
DATA:
ok_code LIKE sy-ucomm,
* Reference for conatiner
go_toolbar_container TYPE REF TO cl_gui_custom_container,
* Reference for SAP Toolbar
go_toolbar TYPE REF TO cl_gui_toolbar,
* Event handler
go_event_handler TYPE REF TO cls_event_handler.
* G L O B A L T A B L E S
DATA:
* Table for registration of events. Note that a TYPE REF
* to cls_event_handler must be created before you can
* reference types cntl_simple_events and cntl_simple_event.
gi_events TYPE cntl_simple_events,
* Workspace for table gi_events
g_event TYPE cntl_simple_event.
*---------------------------------------------------------------------*
* CLASS cls_event_handler DEFINITION
*---------------------------------------------------------------------*
* ........ *
*---------------------------------------------------------------------*
CLASS cls_event_handler DEFINITION.
PUBLIC SECTION.
METHODS:
on_function_selected
FOR EVENT function_selected OF cl_gui_toolbar
IMPORTING fcode,
on_dropdown_clicked
FOR EVENT dropdown_clicked OF cl_gui_toolbar
IMPORTING fcode posx posy.
ENDCLASS.
*---------------------------------------------------------------------*
* CLASS cls_event_handler IMPLEMENTATION
*---------------------------------------------------------------------*
* ........ *
*---------------------------------------------------------------------*
CLASS cls_event_handler IMPLEMENTATION.
METHOD on_function_selected.
CASE fcode.
WHEN 'EXIT'.
LEAVE TO SCREEN 0.
ENDCASE.
ENDMETHOD.
METHOD on_dropdown_clicked.
* Not implented yet
ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
SET SCREEN '100'.
*&---------------------------------------------------------------------*
*& Module STATUS_0100 OUTPUT
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
MODULE status_0100 OUTPUT.
IF go_toolbar_container IS INITIAL.
* Create container
CREATE OBJECT go_toolbar_container
EXPORTING
container_name = 'TOOLBAR_CONTAINER'.
* Create toolbar
CREATE OBJECT go_toolbar
EXPORTING
parent = go_toolbar_container.
* Add a button
CALL METHOD go_toolbar->add_button
EXPORTING fcode = 'EXIT' "Function Code
icon = icon_system_end "ICON name
is_disabled = ' ' "Disabled = X
butn_type = cntb_btype_button "Type of button
text = 'Exit' "Text on button
quickinfo = 'Exit program' "Quick info
is_checked = ' '. "Button selected
* Create event table. The event ID must be found in the
* documentation of the specific control
CLEAR g_event.
REFRESH gi_events.
g_event-eventid = go_toolbar->m_id_function_selected.
g_event-appl_event = 'X'. "This is an application event
APPEND g_event TO gi_events.
g_event-eventid = go_toolbar->m_id_dropdown_clicked.
g_event-appl_event = 'X'.
APPEND g_event TO gi_events.
* Use the events table to register events for the control
CALL METHOD go_toolbar->set_registered_events
EXPORTING
events = gi_events.
* Create event handlers
CREATE OBJECT go_event_handler.
SET HANDLER go_event_handler->on_function_selected
FOR go_toolbar.
SET HANDLER go_event_handler->on_dropdown_clicked
FOR go_toolbar.
ENDIF.
ENDMODULE. " STATUS_0100 OUTPUT
Advanced example
The toolbar in this example contains an Exit button, two buttons that enables/and disables a Print button, and a Menu button with a context menu.
The Disable/Enable buttons are of type Pushbutton group which makes them act together, so when one of the buttons are selected (Down) the other is deselected (Up).
Note that the context menu for the Menu button, must be created as a GUI status. You can create an empty GUI sttaus of type context, and then manually add menus. The context menu instance is created with type reference to class cl_ctmenu.
Steps:

Create a screen and add a custom container named TOOLBAR_CONTAINER

Create a GUI status of type Context and name it TOOLBAR. Note that you can not add any buttons to the GUI sttaus at design time.

The screen:
In this screen shot the Disable button is activated which makes the Print button disabled:



This screenshot shows the context menu and sub menu:



The code:
REPORT sapmz_hf_toolbar .
TYPE-POOLS: icon.
CLASS cls_event_handler DEFINITION DEFERRED.
*--- G L O B A L D A T A
DATA:
ok_code LIKE sy-ucomm,
* Global varables for position of context menu
g_posx TYPE i,
g_posy TYPE i,
* Reference for conatiner
go_toolbar_container TYPE REF TO cl_gui_custom_container,
* Reference for SAP Toolbar
go_toolbar TYPE REF TO cl_gui_toolbar,
* Event handler
go_event_handler TYPE REF TO cls_event_handler,
* Context menu
go_context_menu TYPE REF TO cl_ctmenu.
*--- G L O B A L T A B L E S
DATA:
* Table for registration of events. Note that a TYPE REF
* to cls_event_handler must be created before you can
* reference types cntl_simple_events and cntl_simple_event
gi_events TYPE cntl_simple_events,
* Workspace for table gi_events
g_event TYPE cntl_simple_event,
* Table for button group
gi_button_group TYPE ttb_button.
*---------------------------------------------------------------------*
* CLASS CLS_EVENT_HANDLER
*---------------------------------------------------------------------*
* This class handles the function_selected and dropdow_clicked events
* from the toolbar
*---------------------------------------------------------------------*
CLASS cls_event_handler DEFINITION.
PUBLIC SECTION.
METHODS:
on_function_selected
FOR EVENT function_selected OF cl_gui_toolbar
IMPORTING fcode,
on_dropdown_clicked
FOR EVENT dropdown_clicked OF cl_gui_toolbar
IMPORTING fcode posx posy.
ENDCLASS.
CLASS cls_event_handler IMPLEMENTATION.
METHOD on_function_selected.
*-- Actions for buttons and context menus
CASE fcode.
WHEN 'EXIT'.
LEAVE TO SCREEN 0.
WHEN 'ENABLE'.
* Enable the PRINT button
CALL METHOD go_toolbar->set_button_state
EXPORTING
enabled = 'X'
fcode = 'PRINT'.
WHEN 'DISABLE'.
* Disable the PRINT button
CALL METHOD go_toolbar->set_button_state
EXPORTING
enabled = ' '
fcode = 'PRINT'.
* Other menus and context menus
WHEN 'PRINT'.
CALL FUNCTION 'POPUP_TO_DISPLAY_TEXT'
EXPORTING
textline1 = 'Printing'.
WHEN 'CONTEXT1'.
CALL FUNCTION 'POPUP_TO_DISPLAY_TEXT'
EXPORTING
textline1 = 'Menu: Do something funny'.
WHEN 'CONTEXT2'.
CALL FUNCTION 'POPUP_TO_DISPLAY_TEXT'
EXPORTING
textline1 = 'Menu: Do something crazy'.
WHEN 'SUB1'.
CALL FUNCTION 'POPUP_TO_DISPLAY_TEXT'
EXPORTING
textline1 = 'Submenu: Do something boring'.
WHEN 'SUB2'.
CALL FUNCTION 'POPUP_TO_DISPLAY_TEXT'
EXPORTING
textline1 = 'Submenu: Do something good'.
ENDCASE.
ENDMETHOD.
METHOD on_dropdown_clicked.
*-- Fires when a dropdown menu is clicked. After it has been
*-- clicked a context menu is shown beside the button.
* Save x and y position of button for use with context menu
CLEAR: g_posx, g_posy.
g_posx = posx.
g_posy = posy.
* Create context menu for menu button
PERFORM create_context_menu.
ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
SET SCREEN '100'.
*&---------------------------------------------------------------------*
*& Module STATUS_0100 OUTPUT
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
MODULE status_0100 OUTPUT.
IF go_toolbar_container IS INITIAL.
* Create container
CREATE OBJECT go_toolbar_container
EXPORTING
container_name = 'TOOLBAR_CONTAINER'.
* Create toolbar
CREATE OBJECT go_toolbar
EXPORTING
parent = go_toolbar_container.
* Add a button to the toolbar
PERFORM add_button.
* Add a button group to the toolbar
PERFORM add_button_group.
* Create event table. Note that the event ID must be found in the
* documentation of the specific control
CLEAR g_event. REFRESH gi_events.
g_event-eventid = go_toolbar->m_id_function_selected.
g_event-appl_event = 'X'. "This is an application event
APPEND g_event TO gi_events.
CLEAR g_event.
g_event-eventid = go_toolbar->m_id_dropdown_clicked.
g_event-appl_event = 'X'.
APPEND g_event TO gi_events.
* Use the events table to register events for the control
CALL METHOD go_toolbar->set_registered_events
EXPORTING
events = gi_events.
* Create event handlers
CREATE OBJECT go_event_handler.
SET HANDLER go_event_handler->on_function_selected
FOR go_toolbar.
SET HANDLER go_event_handler->on_dropdown_clicked
FOR go_toolbar.
ENDIF.
ENDMODULE. " STATUS_0100 OUTPUT
*&---------------------------------------------------------------------*
*& Form add_button
*&---------------------------------------------------------------------*
* Adds one pushbutton to the toolbar
*----------------------------------------------------------------------*
FORM add_button.
CALL METHOD go_toolbar->add_button
EXPORTING fcode = 'EXIT' "Function Code
icon = icon_system_end "ICON name
is_disabled = ' ' "Disabled = X
butn_type = cntb_btype_button "Type of button
text = 'Exit' "Text on button
quickinfo = 'Exit program' "Quick info
is_checked = ' '. "Button selected
ENDFORM. " add_button
*&---------------------------------------------------------------------*
*& Form add_button_group
*&---------------------------------------------------------------------*
* Adds a button group to the toolbar.
* The buttons are added to table gi_button_group, and the table is used
* as input to the Add_button_group method. Note that method Fill_buttons
* is used to fill the table.
*----------------------------------------------------------------------*
FORM add_button_group.
* Add a seperator
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = 'SEP1'
icon = ' '
butn_type = cntb_btype_sep
CHANGING
data_table = gi_button_group.
.
* Add an Enable button
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = 'ENABLE'
icon = ' '
butn_type = cntb_btype_group
text = 'Enable'
quickinfo = 'Enable a print button'
checked = 'X'
CHANGING
data_table = gi_button_group.
.
* Add a Disable button
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = 'DISABLE'
icon = ''
butn_type = cntb_btype_group
text = 'Disable'
quickinfo = 'Disable print button'
checked = ' '
CHANGING
data_table = gi_button_group.
* Add a seperator
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = 'SEP2'
icon = ' '
butn_type = cntb_btype_sep
CHANGING
data_table = gi_button_group.
* Add print button
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = 'PRINT'
icon = icon_print
butn_type = cntb_btype_button
text = 'Print'
quickinfo = 'Print something'
CHANGING
data_table = gi_button_group.
* Add a menu button
CALL METHOD cl_gui_toolbar=>fill_buttons_data_table
EXPORTING
fcode = '