*&---------------------------------------------------------------------*
*& Report demo_cfw *
*&---------------------------------------------------------------------*
REPORT demo_cfw.
*&---------------------------------------------------------------------*
*& Global Declarations *
*&---------------------------------------------------------------------*
* Class Definitions
CLASS screen_handler DEFINITION CREATE PRIVATE.
PUBLIC SECTION.
CLASS-DATA screen TYPE REF TO screen_handler.
CLASS-METHODS create_screen.
METHODS constructor.
PRIVATE SECTION.
DATA: container_html TYPE REF TO cl_gui_custom_container,
container_box TYPE REF TO cl_gui_dialogbox_container,
picture TYPE REF TO cl_gui_picture,
tree TYPE REF TO cl_gui_simple_tree,
html_viewer TYPE REF TO cl_gui_html_viewer,
list_viewer TYPE REF TO cl_gui_alv_grid.
METHODS: fill_tree,
fill_picture,
handle_node_double_click
FOR EVENT node_double_click OF cl_gui_simple_tree
IMPORTING node_key,
close_box
FOR EVENT close OF cl_gui_dialogbox_container,
fill_html IMPORTING i_carrid TYPE spfli-carrid,
fill_list IMPORTING i_carrid TYPE spfli-carrid
i_connid TYPE spfli-connid.
ENDCLASS. "screen_handler DEFINITION
* Class Implementations
CLASS screen_handler IMPLEMENTATION.
METHOD create_screen.
IF screen IS INITIAL.
CREATE OBJECT screen.
ENDIF.
ENDMETHOD. "create_screen
METHOD constructor.
DATA: l_event_tab TYPE cntl_simple_events,
l_event LIKE LINE OF l_event_tab,
l_docking TYPE REF TO cl_gui_docking_container,
l_splitter TYPE REF TO cl_gui_splitter_container,
l_container_screen TYPE REF TO cl_gui_custom_container,
l_container_top TYPE REF TO cl_gui_container,
l_container_bottom TYPE REF TO cl_gui_container.
CREATE OBJECT container\_html
EXPORTING container\_name = 'CUSTOM\_CONTROL'.
CREATE OBJECT l\_docking
EXPORTING side = cl\_gui\_docking\_container=>dock\_at\_left
extension = 135.
CREATE OBJECT l\_splitter
EXPORTING parent = l\_docking
rows = 2
columns = 1.
l\_splitter->set\_border(
EXPORTING border = cl\_gui\_cfw=>false ).
l\_splitter->set\_row\_mode(
EXPORTING mode = l\_splitter->mode\_absolute ).
l\_splitter->set\_row\_height(
EXPORTING id = 1
height = 180 ).
l\_container\_top =
l\_splitter->get\_container( row = 1 column = 1 ).
l\_container\_bottom =
l\_splitter->get\_container( row = 2 column = 1 ).
CREATE OBJECT picture
EXPORTING parent = l\_container\_top.
CREATE OBJECT tree
EXPORTING parent = l\_container\_bottom
node\_selection\_mode =
cl\_gui\_simple\_tree=>node\_sel\_mode\_single.
l\_event-eventid = cl\_gui\_simple\_tree=>eventid\_node\_double\_click.
l\_event-appl\_event = ' '. "system event, does not trigger PAI
APPEND l\_event TO l\_event\_tab.
tree->set\_registered\_events(
EXPORTING events = l\_event\_tab ).
SET HANDLER me->handle\_node\_double\_click FOR tree.
me->fill\_picture( ).
me->fill\_tree( ).
ENDMETHOD. "constructor
METHOD fill_picture.
TYPES pict_line TYPE x LENGTH 1022.
DATA l_mime_api TYPE REF TO if_mr_api.
DATA l_pict_wa TYPE xstring.
DATA l_pict_tab TYPE TABLE OF pict_line.
DATA l_url TYPE c LENGTH 255.
l\_mime\_api = cl\_mime\_repository\_api=>get\_api( ).
l\_mime\_api->get(
EXPORTING i\_url = '/SAP/PUBLIC/BC/ABAP/Sources/PLANE.GIF'
IMPORTING e\_content = l\_pict\_wa
EXCEPTIONS OTHERS = 4 ).
IF sy-subrc <> 0.
RETURN.
ENDIF.
l\_pict\_tab =
VALUE #( LET l1 = xstrlen( l\_pict\_wa ) l2 = l1 - 1022 IN
FOR j = 0 THEN j + 1022 UNTIL j >= l1
( COND #( WHEN j <= l2 THEN
l\_pict\_wa+j(1022)
ELSE l\_pict\_wa+j ) ) ).
CALL FUNCTION 'DP\_CREATE\_URL'
EXPORTING
type = 'IMAGE'
subtype = 'GIF'
TABLES
data = l\_pict\_tab
CHANGING
url = l\_url.
picture->load\_picture\_from\_url(
EXPORTING url = l\_url ).
picture->set\_display\_mode(
EXPORTING display\_mode = picture->display\_mode\_stretch ).
ENDMETHOD. "fill_picture
METHOD fill_tree.
DATA: l_node_table TYPE TABLE OF abdemonode,
l_node TYPE abdemonode,
BEGIN OF l_spfli,
carrid TYPE spfli-carrid,
connid TYPE spfli-connid,
END OF l_spfli,
l_spfli_tab LIKE SORTED TABLE OF l_spfli
WITH UNIQUE KEY carrid connid.
SELECT carrid, connid
FROM spfli
INTO CORRESPONDING FIELDS OF TABLE @l\_spfli\_tab.
l\_node-hidden = ' '. " All nodes are visible,
l\_node-disabled = ' '. " selectable,
l\_node-isfolder = 'X'. " a folder,
l\_node-expander = ' '. " have no '+' sign for expansion.
LOOP AT l\_spfli\_tab INTO l\_spfli.
AT NEW carrid.
l\_node-node\_key = l\_spfli-carrid.
CLEAR l\_node-relatkey.
CLEAR l\_node-relatship.
l\_node-text = l\_spfli-carrid.
l\_node-n\_image = ' '.
l\_node-exp\_image = ' '.
APPEND l\_node TO l\_node\_table.
ENDAT.
AT NEW connid.
l\_node-node\_key = l\_spfli-carrid && l\_spfli-connid.
l\_node-relatkey = l\_spfli-carrid.
l\_node-relatship = cl\_gui\_simple\_tree=>relat\_last\_child.
l\_node-text = l\_spfli-connid.
l\_node-n\_image = '@AV@'. "AV is the internal code
l\_node-exp\_image = '@AV@'. "for an airplane icon
ENDAT.
APPEND l\_node TO l\_node\_table.
ENDLOOP.
tree->add\_nodes(
EXPORTING table\_structure\_name = 'ABDEMONODE'
node\_table = l\_node\_table ).
ENDMETHOD. "fill_tree
METHOD handle_node_double_click.
DATA: l_carrid TYPE spfli-carrid,
l_connid TYPE spfli-connid.
l\_carrid = node\_key(2).
l\_connid = node\_key+2(4).
IF l\_connid IS INITIAL.
fill\_html( EXPORTING i\_carrid = l\_carrid ).
ELSE.
fill\_list( EXPORTING i\_carrid = l\_carrid
i\_connid = l\_connid ).
ENDIF.
ENDMETHOD. "handle_node_double_click
METHOD fill_html.
DATA l_url TYPE scarr-url.
IF html\_viewer IS INITIAL.
CREATE OBJECT html\_viewer
EXPORTING parent = container\_html.
ENDIF.
SELECT SINGLE url
FROM scarr
WHERE carrid = @i\_carrid
INTO @l\_url.
html\_viewer->show\_url(
EXPORTING url = l\_url ).
ENDMETHOD. "fill_html
METHOD fill_list.
DATA: l_flight_tab TYPE TABLE OF demofli,
BEGIN OF l_flight_title,
carrname TYPE scarr-carrname,
cityfrom TYPE spfli-cityfrom,
cityto TYPE spfli-cityto,
END OF l_flight_title,
l_list_layout TYPE lvc_s_layo.
IF container\_box IS INITIAL.
CREATE OBJECT container\_box
EXPORTING width = 250
height = 200
top = 100
left = 400
caption = 'Flight List'.
SET HANDLER close\_box FOR container\_box.
CREATE OBJECT list\_viewer
EXPORTING i\_parent = container\_box.
ENDIF.
SELECT SINGLE c~carrname, p~cityfrom, p~cityto
FROM ( scarr AS c
INNER JOIN spfli AS p ON c~carrid = p~carrid )
WHERE p~carrid = @i\_carrid AND
p~connid = @i\_connid
INTO CORRESPONDING FIELDS OF @l\_flight\_title.
SELECT fldate, seatsmax, seatsocc
FROM sflight
WHERE carrid = @i\_carrid AND connid = @i\_connid
ORDER BY fldate
INTO CORRESPONDING FIELDS OF TABLE @l\_flight\_tab.
l\_list\_layout-grid\_title = l\_flight\_title-carrname && \` \` &&
i\_connid && \` \` &&
l\_flight\_title-cityfrom && \` \` &&
l\_flight\_title-cityto.
l\_list\_layout-smalltitle = 'X'. "The list title has small fonts,
l\_list\_layout-cwidth\_opt = 'X'. "the column width is adjusted,
l\_list\_layout-no\_toolbar = 'X'. "the toolbar is suppressed.
list\_viewer->set\_table\_for\_first\_display(
EXPORTING i\_structure\_name = 'DEMOFLI'
is\_layout = l\_list\_layout
CHANGING it\_outtab = l\_flight\_tab ).
ENDMETHOD. "fill_list
METHOD close_box.
list_viewer->free( ).
container_box->free( ).
CLEAR: list_viewer,
container_box.
ENDMETHOD. "close_box
ENDCLASS. "screen_handler IMPLEMENTATION
*&---------------------------------------------------------------------*
*& Processing Blocks called by the Runtime Environment *
*&---------------------------------------------------------------------*
* Event Block START-OF-SELECTION
START-OF-SELECTION.
CALL SCREEN 100.
* Dialog Module PBO
MODULE status_0100 OUTPUT.
SET PF-STATUS 'SCREEN_100'.
SET TITLEBAR 'TIT_100'.
screen_handler=>create_screen( ).
ENDMODULE. "status_0100 OUTPUT
* Dialog Module PAI
MODULE cancel INPUT.
LEAVE PROGRAM.
ENDMODULE. "cancel INPUT
Description
On the screen layout of screen 100 is a Custom Control named CUSTOM_CONTROL that covers the entire screen area. In the flow logic, both dialog modules STATUS_0100 and CANCEL are called at which the addition AT EXIT-COMMAND is used for PAI.
In GUI status SCREEN_100, the common symbols of the status bar are occupied with function codes of the type E. The PAI module only serves to exit the program. The most important action to PBO is calling the static method create_screen of the local class screen_handler, in which an object of this class is created.
The instance constructor of the class screen_handler generates container controls for a Picture Control and a Tree Control and afterwards both application controls.
First, a Docking Control is created with the local reference variable l_docking. By transferring the constant dock_at_left of the class CL_GUI_DOCKING_CONTAINER to the parameter side, a new area is created on the left side of the screen with a width of 135 pixels.
This screen area is split into two horizontal areas. This is achieved via the local reference variable l_splitter, which creates an object of the class CL_GUI_SPLITTER_CONTAINER and transfers the reference to the Docking Control to the parameter parent.
Using the functional method get_container, the references to both areas of the splitter-control are determined in the local reference variables l_container_top and l_container_bottom . Afterwards, the application-controls Picture and Tree are generated, at which the parameter parent of each constructor receives one of the references to the areas of the splitter control.
By calling the method set_registered_events, the doubleclick event for the nodes of the tree are activated as system event. The method handle_node_double_click is registered as event handler.
When leaving the instance constructor, all reference variables are deleted. However, the control objects generated in the constructor with local reference variables are not collected by the garbage collection, as they are maintained by references from the CFW.
The method fill_picture imports an image file in GIF format from the MIME Repository into a byte string l_pict_wa, which is then filled into an internal table l_pict_tab. The function module DP_CREATE_URL generates an URL address for this table in the local variable l_url, which is passed to the method load_picture_from_url of the Picture Control.
The method fill_tree generates the tree structure of the tree control in the internal table l_node_table of the row structure ABDEMONODE. Every row of the table describes a node of the tree structure and must have a unique node key node_key for it. The components relatkey and relatship describe the relationships among the nodes.
The node table is generated from the content of the database table SPFLI. At the subnodes, the standard icons for non-expanded and expanded nodes are replaced with aircraft icons.
The event handler method handle_node_double_click imports the parameter node_key of the event node_double_click of the class CL_GUI_SIMPLE_TREE, which contains the key of the selected node. Depending on the content, the methods fill_html or fill_list are called.
When the method fill_html is called for the first time, it generates an object of the class CL_GUI_HTML_VIEWER and links the associated HTML control with the area of the container control to which the reference in container_html points (with the Custom Control on the screen). According to the selected node, the web address of an airline is read and handed over to the method show_url of the HTML control, by which the Homepage of the airline is displayed.
The method fill_list generates a dialog box container and an ALV Grid Control that is displayed in the dialog box. The event handler close_box is registered for the dialog box container. Activation using the method set_registered_events is not necessary here, as the event is activated by the class itself as system event when the object is generated. A list is generated for the selected nodes. By assigning values to some components of the structure l_list_layout of the type lvc_s_layo, it is determined that the list title in displayed in small format, and that the column width of the list is optimized, and that the list should not have an application toolbar. By calling the method set_table_for_first_display of the ALV Grid Control, the list is displayed in the dialog box.
You use the event handler method close_box to close the dialog box. To do this, you call the methods free of the concerned controls one after another and then initialize the respective reference variables. After that, if a node is selected to generate a list, both controls are created again in the method fill_list. All other controls of the program cannot be deleted by the user and will be available until the program ends.
Note
The class CL_SALV_TABLE and other classes with the prefix CL_SALV_ meanwhile offer more comfortable ways of displaying ALV Controls.
手机扫一扫
移动阅读更方便
你可能感兴趣的文章