poIImagePlane SetVisibility

Sets the visibility setting for the image plane.

Syntax

Imageplane_handle SetVisibility state

Application

HyperView Tcl Modify

Description

The visibility flag indicates whether the image plane will be drawn or remain invisible. This command alters the visibility.

Inputs

state: True to make the image plane visible, False to make it invisible.

Example

To create two image planes, and then make one invisible:

hwi OpenStack
if {[catch {
hwi OpenStack
    hwi GetSessionHandle session_handle 
    session_handle GetProjectHandle project_handle
    project_handle GetPageHandle page_handle [project_handle GetActivePage]
    page_handle GetWindowHandle window_handle [page_handle GetActiveWindow]
    window_handle GetClientHandle client_handle
    client_handle GetImagePlaneCtrlHandle ipc_handle
    set ipid1 [ipc_handle AddImagePlane Logo1]
    ipc_handle GetImagePlaneHandle imageplane_handle $ipid1
    imageplane_handle SetFileName g:/samples2/VideoOverlay/logo1.jpg
    imageplane_handle SetMode background
    imageplane_handle ReleaseHandle
    set ipid2 [ipc_handle AddImagePlane Video1]
    ipc_handle GetImagePlaneHandle imageplane_handle $ipid2
    imageplane_handle SetFileName g:/samples2/VideoOverlay/video1.jpg
    imageplane_handle SetMode background
    imageplane_handle ReleaseHandle
    
    ipc_handle GetImagePlaneHandle imageplane_handle $ipid1
    imageplane_handle SetVisibility false
    client_handle Draw
} result]} {
    global errorInfo;
    puts stderr $result;
    puts "[session_handle GetError]";
    puts stderr "*** Tcl TRACE ***";
    puts stderr $errorInfo;
} else {
    puts "No errors.";
    puts "Warnings: ";
    puts "    [session_handle GetError]";
}   
    
hwi CloseStack

Errors

Returns HW_InvalidHandle if the image plane handle is invalid.