poIImagePlane SetMaintainAspectRatio

Sets the value of the Maintain Aspect Ratio flag for the image plane.

Syntax

Imageplane_handle SetMaintainAspectRatioval

Application

HyperView Tcl Modify

Description

When image planes are in foreground or background mode, setting this flag causes HyperView to maintain the original image or video’s aspect ratio. Resizing the image plane using the manipulator will continue to maintain the image aspect ration. If the flag is cleared, the image plane can be stretched without regard to aspect ratio. This command controls the value of the flag for the image plane.

Inputs

val: True or false to maintain the aspect ratio (or not).

Example

To create two image planes, and then set the aspect maintain aspect ratio for one of the image planes:

if {[catch {
    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 SetLabel "Company Logo";
    imageplane_handle SetAlpha 80
    imageplane_handle SetMode foreground
    imageplane_handle SetAssociatedModelID 1
    imageplane_handle SetCullAngle 45
    imageplane_handle SetBackFaceVisibility true
    imageplane_handle SetCrop 0.2 0.2 0.8 0.8
    imageplane_handle SetStretchToFit false
    imageplane_handle SetMaintainAspectRatio 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.