Vector Change Notifications and Notification Categories

Description

Vectors

When calling some functions of the LVectorBase LEADTOOLS C++ Class Library classes, particularly those that affect the vector itself, then notification messages are sent through the LVectorBase::StartChanging and LVectorBase::EndChanging member functions. These functions are called before and after executing the function that changes the bitmap. This gives you more control over the operation in progress. In order to use this feature, you must override the virtual functions for StartChanging and EndChanging. In the LVectorBase::StartChanging function, if you return an error code, the change operation will halt the calling function and will return the same error code. In the LVectorBase::EndChanging function you will be notified that the calling function's operation is complete. This gives you a chance to do other processing such as updating the display.

The following sections describe the change notifications and the notification categories:

Vector Changing Notifications:

The following is a list of all the notification messages and the functions that send them:

Notification Message Function In Progress
NC_VECTOR_ADD_GROUP LVectorBase::AddGroup
NC_VECTOR_ADD_LAYER LVectorBase::AddLayer
NC_VECTOR_ADD_OBJECT LVectorLayer::AddObject
NC_VECTOR_ATTACH LVectorBase::AttachToWindow
NC_VECTOR_BACKCOLOR LVectorBase::SetBackgroundColor
NC_VECTOR_BIND_VERTICES LVectorBase::SetBindVerticesMode
NC_VECTOR_CAMERA LVectorBase::SetCamera
NC_VECTOR_COPY LVectorBase::Copy
NC_VECTOR_COPY_GROUP LVectorBase::CopyGroup
NC_VECTOR_COPY_LAYER LVectorBase::CopyLayer
NC_VECTOR_COPY_OBJECT LVectorBase::CopyObject
NC_VECTOR_DELETE_GROUP LVectorGroup::DeleteGroup
NC_VECTOR_DELETE_GROUP_CLONES LVectorGroup::DeleteGroupClones
NC_VECTOR_DELETE_LAYER LVectorLayer::DeleteLayer
NC_VECTOR_DELETE_OBJECTS LVectorBase::DeleteObject
NC_VECTOR_DIALOG_CAMERA LVectorDialog::DoModalVectorCamera
NC_VECTOR_DIALOG_ROTATE LVectorDialog::DoModalVectorRotate
NC_VECTOR_DIALOG_SCALE LVectorDialog::DoModalVectorScale
NC_VECTOR_DIALOG_TRANSLATE LVectorDialog::DoModalVectorTranslate
NC_VECTOR_EMPTY_GROUP LVectorGroup::EmptyGroup
NC_VECTOR_EMPTY_LAYER LVectorLayer::EmptyLayer
NC_VECTOR_EXPLODE_OBJECT LVectorObject::ExplodeObject
NC_VECTOR_FREE LVectorBase::Free
NC_VECTOR_PAN LVectorBase::SetPan
NC_VECTOR_POLYGON_MODE LVectorBase::SetPolygonMode
NC_VECTOR_REALIZE LVectorBase::Realize
NC_VECTOR_ROTATE LVectorBase::SetRotation
NC_VECTOR_SCALE LVectorBase::SetScale
NC_VECTOR_SET_OBJECT LVectorObject::UnlockObject
NC_VECTOR_TRANSLATE LVectorBase::SetTranslation
NC_VECTOR_VECTORHANDLE LVectorBase::SetHandle
NC_VECTOR_VIEW_MODE LVectorBase::SetViewMode
NC_VECTOR_VIEW_PORT LVectorBase::SetViewport

Vector Changing Notification Categories:

The following is a list of all the notification categories:

Notification Message Function In Progress
NCAT_VECTOR LVectorBase functions for setting view and object characteristics
NCAT_VECTOR_DIALOG LVectorDialog dialog generation
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