WDA学习(28):Drag &Drop使用
1.21 Drag Drop使用
本实例测试Drag Drop;
运行结果:
Drag图标Drop到添加Icon,会将一条记录添加到Table;
Drag Table记录Drop到垃圾桶Icon,会将记录删除;
Group1中不同Tray可以交换位置;
Group2中不同Tray可以交换位置;
Setting:设置Group1,Group2是否可以Drag,Drop;
1.创建Component,View: V_DRAGDROP;
2.创建Context节点;
创建Node:NODE_INFO,保存Icon信息;
Attribute:NAME,类型String,Icon名称;
Attribute:DESC,类型String,Icon描述;
Attribute:PIC,类型String,Icon详细信息;
创建Node:NODE_PARAM,setting绑定值,设置group1,group2是否drag,drop enable;
Attribute:GP1_DRAG_ENABLE,类型WDY_BOOLEAN,设置是否group1 drag enable;
Attribute:GP1_DROP_ENABLE,类型WDY_BOOLEAN,设置是否group1 drop enable;
Attribute:GP2_DRAG_ENABLE,类型WDY_BOOLEAN,设置是否group2 drag enable;
Attribute:GP2_DROP_ENABLE,类型WDY_BOOLEAN,设置是否group2 drop enable;
3.创建Layout UI Element
创建Tray:TRAY1,包含Group1,Group2;
创建Group:GROUP1:
创建Image:IMG1~3;
分别设置source:
~IconLarge/SuccessMessage
~IconLarge/ErrorMessage
~IconLarge/HintMessage
创建DropTarget:DT1,onDrop:绑定Action,DROP;
DT1中创建Image:IMG4,source: trash.png,MIMES上传图片;
DT1中创建DropTargetInfo: DROPTARGETINFO,设置tags: delete;
创建Group:GROUP2:
创建DropTarget:DT2,onDrop:绑定Action,DROP;
DT2中创建TextView,设置text, 添加Icon;
DT2中创建DropTargetInfo: DROPTARGETINFO_1,设置tags: save*
创建Tray:TRAY2,包含GP21,GP22,GP23;
创建Group:GP21,
创建Tray1~Tray4;
创建Group:GP22,
创建Tray5~Tray6;
创建Group:GP23,
创建CheckBox,分别绑定Attribute:GP1_DRAG_ENABLE,Attribute:GP1_DROP_ENABLE, Attribute:GP2_DRAG_ENABLE, Attribute:GP2_DROP_ENABLE;
4.Attributes页签,变量定义;
5.实现Method页签方法
Method: INIT_DRAGDROP,初始化Tray2中group1,group2中drag,drop设置,在WDDOMODIFYVIEW方法中调用;
代码实例:
"drag_source_info,drop_target_info,有这两个属性可以设置drag drop
"Gridlayout:CL_WD_GRID_LAYOUT
"MatrixLayout:CL_WD_MATRIX_LAYOUT
DATA:lo_container TYPE REF TO cl_wd_uielement_container.
DATA:lo_gridlayout TYPE REF TO cl_wd_grid_layout.
DATA:lo_drag_source_info TYPE REF TO cl_wd_drag_source_info.
DATA:lo_drop_target_info TYPE REF TO cl_wd_drop_target_info. wd_this->v_drag_group = 'GROUP1'. "获取容器
lo_container ?= wd_this->v_view->get_element( 'GP21' ).
lo_gridlayout ?= lo_container->get_layout( ).
lo_gridlayout->set_on_drop( 'DROP_GP1' ).
lo_drag_source_info = cl_wd_drag_source_info=>new_drag_source_info(
bind_enabled = 'NODE_PARAM.GP1_DRAG_ENABLE'
view = wd_this->v_view
tags = 'gp1drag'
).
lo_drop_target_info = cl_wd_drop_target_info=>new_drop_target_info(
bind_enabled = 'NODE_PARAM.GP1_DROP_ENABLE'
view = wd_this->v_view
tags = 'gp1drag* drop'
).
"绑定drag,drop
lo_gridlayout->set_drag_source_info( lo_drag_source_info ).
lo_gridlayout->set_drop_target_info( lo_drop_target_info ). "获取容器
lo_container ?= wd_this->v_view->get_element( 'GP22' ).
lo_gridlayout ?= lo_container->get_layout( ).
lo_gridlayout->set_on_drop( 'DROP_GP2' ).
lo_drag_source_info = cl_wd_drag_source_info=>new_drag_source_info(
bind_enabled = 'NODE_PARAM.GP2_DRAG_ENABLE'
view = wd_this->v_view
tags = 'gp2drag'
).
lo_drop_target_info = cl_wd_drop_target_info=>new_drop_target_info(
bind_enabled = 'NODE_PARAM.GP2_DROP_ENABLE'
view = wd_this->v_view
tags = 'gp2drag* drop'
).
"绑定drag,drop
lo_gridlayout->set_drag_source_info( lo_drag_source_info ).
lo_gridlayout->set_drop_target_info( lo_drop_target_info ).
Method: MODIFY_VIEW,当Tray2中,Group1,Group2拖动顺序改变时,更新页面。在WDDOMODIFYVIEW方法中调用。
代码实例:
DATA:lo_container TYPE REF TO cl_wd_uielement_container.
DATA:lo_element TYPE REF TO cl_wd_uielement.
DATA:lt_elements TYPE cl_wd_uielement_container=>tt_uielement.
DATA:lo_grid_layout TYPE REF TO cl_wd_grid_layout.
DATA:lo_grid_data TYPE REF TO cl_wd_grid_data.
DATA:lv_grid_data TYPE string.
DATA:lv_source_index TYPE i.
DATA:lv_target_index TYPE i. "获取容器
IF wd_this->v_drag_group = 'GROUP1'.
lo_container ?= wd_this->v_view->get_element( 'GP21' ).
ELSEIF wd_this->v_drag_group = 'GROUP2'.
lo_container ?= wd_this->v_view->get_element( 'GP22' ).
ENDIF. lt_elements = lo_container->get_children( ).
"获取被拖动的element,以及初始位置
LOOP AT lt_elements INTO lo_element.
lv_source_index = sy-tabix.
lo_grid_data ?= lo_element->get_layout_data( ).
lv_grid_data = lo_grid_data->get_drag_data( ).
IF lv_grid_data = wd_this->v_drag_data.
EXIT.
ENDIF.
ENDLOOP.
IF wd_this->v_drag_data IS NOT INITIAL.
IF wd_this->v_drag_offset = -1.
lv_target_index = wd_this->v_drag_index.
ELSE.
lv_target_index = wd_this->v_drag_index + 1.
ENDIF.
IF lv_source_index < lv_target_index.
lv_target_index = lv_target_index - 1.
ENDIF.
"移除再添加element
lo_container->remove_child( index = lv_source_index ).
lo_container->add_child( the_child = lo_element index = lv_target_index ).
ENDIF.
Method: ONACTIONDROP,Action:DROP对应方法;
代码实例:
DATA:lo_node TYPE REF TO if_wd_context_node.
DATA:lo_element TYPE REF TO if_wd_context_element.
DATA:lt_info TYPE wd_this->elements_node_info.
DATA:ls_info TYPE wd_this->element_node_info.
DATA:lo_event TYPE REF TO cl_wd_custom_event.
DATA:lv_tags TYPE string.
DATA:lv_index TYPE I. lo_event = wdevent.
lv_tags = tags.
"lv_tags = lo_event->get_string( name = 'TAGS' ).
"获取节点
lo_node = wd_context->get_child_node( wd_this->wdctx_node_info ).
lo_node->get_static_attributes_table( IMPORTING table = lt_info ). CASE lv_tags.
WHEN 'save_success'.
READ TABLE lt_info INTO ls_info WITH KEY name = 'ICON_SUCCESS'.
IF sy-subrc <> 0.
ls_info-name = 'ICON_SUCCESS'.
ls_info-desc = 'success'.
ls_info-pic = '~IconLarge/SuccessMessage'.
APPEND ls_info TO lt_info.
ENDIF. WHEN 'save_info'.
READ TABLE lt_info INTO ls_info WITH KEY name = 'ICON_INFO'.
IF sy-subrc <> 0.
ls_info-name = 'ICON_INFO'.
ls_info-desc = 'information'.
ls_info-pic = '~IconLarge/HintMessage'.
APPEND ls_info TO lt_info.
ENDIF.
WHEN 'save_error'.
READ TABLE lt_info INTO ls_info WITH KEY name = 'ICON_ERROR'.
IF sy-subrc <> 0.
ls_info-name = 'ICON_ERROR'.
ls_info-desc = 'error'.
ls_info-pic = '~IconLarge/ErrorMessage'.
APPEND ls_info TO lt_info.
ENDIF.
WHEN 'delete'.
"获取选择行
lv_index = lo_node->get_lead_selection_index( ).
DELETE lt_info INDEX lv_index.
ENDCASE. lo_node->bind_table( new_items = lt_info set_initial_elements = abap_true ).
Method: ONACTIONDROP_GP1,Action:DROP_GP1,处理group1中drop;
代码实例:
DATA:lo_event TYPE REF TO cl_wd_custom_event.
lo_event = wdevent.
wd_this->v_drag_data = lo_event->get_string( 'DATA' ).
wd_this->v_drag_tags = lo_event->get_string( 'TAGS' ).
wd_this->v_drag_index = lo_event->get_int( 'INDEX' ).
wd_this->v_drag_offset = lo_event->get_int( 'OFFSET' ).
wd_this->v_drag_id = lo_event->get_string( 'ID' ). "group
wd_this->v_drag_group = 'GROUP1'.
Method: ONACTIONDROP_GP2,Action:DROP_GP2,处理group2中drop;
代码实例:
DATA:lo_event TYPE REF TO cl_wd_custom_event.
lo_event = wdevent.
wd_this->v_drag_data = lo_event->get_string( 'DATA' ).
wd_this->v_drag_tags = lo_event->get_string( 'TAGS' ).
wd_this->v_drag_index = lo_event->get_int( 'INDEX' ).
wd_this->v_drag_offset = lo_event->get_int( 'OFFSET' ).
wd_this->v_drag_id = lo_event->get_string( 'ID' ). "group
wd_this->v_drag_group = 'GROUP2'.
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