HasDragStartHandlers (Smart GWT EE API 14.0p (2026-01-20))

All Superinterfaces:

com.google.gwt.event.shared.HasHandlers

All Known Implementing Classes:

AceEditor, ActiveXControl, AdaptiveMenu, AdvancedHiliteEditor, AISortProgressDialog, AIWindow, BatchUploader, BatchUploader, BrowserPlugin, BuildUIViaAIProgressDialog, BuildViaAIProgressDialog, Button, Calendar, CalendarView, Canvas, ColorPicker, ColumnTree, CSSEditor, CubeGrid, DataView, DateChooser, DateGrid, DateRangeDialog, Deck, DetailViewer, Dialog, DrawKnob, DrawPane, DynamicForm, EdgedCanvas, EditPane, EditSearchWindow, EditTree, EventCanvas, FacetChart, FieldPicker, FieldPickerWindow, FilterBuilder, FilterClause, FilterViaAIProgressDialog, Flashlet, FlowLayout, Gauge, GradientEditor, GridRenderer, HeaderControl, HiliteEditor, HiliteRule, HiliteViaAIProgressDialog, HLayout, HStack, HTMLFlow, HTMLPane, IButton, IconButton, IconMenuButton, IMenuButton, Img, ImgButton, ImgSectionHeader, ImgSplitbar, ImgTab, IndicatorCanvas, Label, Layout, LayoutSpacer, ListGrid, ListPalette, ListPropertiesDialog, ListPropertiesPane, Menu, MenuBar, MenuButton, MenuPalette, MiniNavControl, MultiFilePicker, MultiGroupDialog, MultiGroupPanel, MultiSortDialog, MultiSortPanel, NavigationBar, NavigationButton, NavPanel, PickListMenu, PortalLayout, Portlet, PrintCanvas, PrintWindow, Progressbar, PropertySheet, RangeSlider, RecordEditor, Reify, RibbonBar, RibbonButton, RibbonGroup, RibbonMenuButton, RichTextEditor, RowRangeDisplay, SavedSearchEditor, ScreenLoader, Scrollbar, SearchForm, SectionHeader, SectionStack, SelectionTreeMenu, SeleneseRecorder, Shuttle, SimpleTile, Slider, Snapbar, Splitbar, SplitPane, StatefulCanvas, StretchImg, StretchImgButton, SVG, TabBar, TableView, TabSet, TileGrid, TileLayout, TilePalette, Timeline, ToggleSwitch, Toolbar, ToolStrip, ToolStripButton, ToolStripGroup, ToolStripMenuButton, ToolStripResizer, ToolStripSeparator, ToolStripSpacer, TourWindow, TransferImgButton, TreeGrid, TreeMenuButton, TreePalette, ViewLoader, VLayout, VStack, WidgetCanvas, Window, ZoneCanvas
```
public interface HasDragStartHandlers
extends com.google.gwt.event.shared.HasHandlers
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`com.google.gwt.event.shared.HandlerRegistration`	`addDragStartHandler(DragStartHandler handler)` Executed when dragging first starts.

Methods inherited from interface com.google.gwt.event.shared.HasHandlers
fireEvent

- Method Detail
  - addDragStartHandler
```
com.google.gwt.event.shared.HandlerRegistration addDragStartHandler(DragStartHandler handler)
```
    Executed when dragging first starts. Your widget can use this opportunity to set things up for the drag, such as setting the drag tracker. Returning false from this event handler will cancel the drag action entirely.
    A drag action is considered to be begin when the mouse has moved dragStartDistance with the left mouse down.
    
    Parameters:
    
    handler - the dragStart handler
    
    Returns:
    
    HandlerRegistration used to remove this handler

Interface HasDragStartHandlers

Method Summary

Methods inherited from interface com.google.gwt.event.shared.HasHandlers

Method Detail

addDragStartHandler