Data Sharing Between Apps
See the Delphi 10 and Delphi 7 examples on GitHub.
The Glue42 Channels are enabled by default when registering a VBA window as a Glue42 Window. You have to provide handler implementations for the Channel related events that will be raised due to interaction with the Glue42 Window instance - changing Channels and handling Channel data updates. When the Glue42 Channels are enabled, a Channel Selector box is available in the window title bar.
To check whether the Channel Selector is visible, use the
GetChannelSupport method of an
IGlueWindow instance. To hide or show the Channel Selector, use the
Note that currently the
SetChannelSupport method only hides or shows the Channel Selector, but doesn't enable or disable the Channel support. This can be done only during window registration.
// Toggle the visibility of the Channel Selector. if glueWin.GetChannelSupport() then glueWin.SetChannelSupport(False) else glueWin.SetChannelSupport(True);
Handling Channel Change
To handle the event when the user changes the Channel via the Channel Selector, use the
HandleChannelChanged method of the
function TMainForm.HandleChannelChanged(const glueWindow: IGlueWindow; const channel: IGlueContext; prevChannel: GlueContext): HResult; begin if not Assigned(channel) then begin // Previous Channel deselected, no new Channel selected. ... end else begin // New Channel selected. ... end; Result := S_OK; end;
Subscribing for Channel Updates
To handle the event when the data in the current Channel is updated or the user selects a new Channel, use the
HandleChannelData method of the
function TMainForm.HandleChannelData(const glueWindow: IGlueWindow; const channelUpdate: IGlueContextUpdate): HResult; var channel: IGlueContext; data: TGlueContextValueArray; begin channel := channelUpdate.GetContext(); // Get the Channel data in a native data structure. rawData := channel.GetData(); data := SA_AsTranslatedContextValues(rawData); ... SafeArrayDestroy(rawData); Result := S_OK; end;
To publish data to a Channel, you must update the shared context object dedicated the respective Channel. For details on how to update a shared context object, see the
Shared Contexts > Updating a Context section.
Note that you must only update the value of the
"data" property of the context object. The
"meta" properties must not be modified, because they are specifically set for each Channel.