Batches

In This Topic

About Batches

Batches serve as a functionality layer between the DDOM and the user. They help you apply a uniform operation to a set of diagram items. All types of batches derive from the base NBatch abstract class. Some batch operations are constrained by permissions (see Abilities, Protection and Permissions for more information). The batches are defined in the Nevron.Nov.Diagram.Batches namespace.

Prior to executing some batch operation you must first call it's Build method, which takes a single argument - array of nodes, from which the batch must be built.

Batches are used to perform different operations on a set of diagram items, which are optionally recorded as a single transaction in the document history service. All batch methods, which record transactions in the document history service return an instance of the NTransactionResult structure.

Following is a brief description of the currently available batches:

Batch class	Description
NBatchCompose	Facilitate the Composite Solid Geometry operations with shape geometries (e.g. Union, Intersect, Subtract and ExclusiveOr).
NBatchDelete	Facilitate the deletion of multiple diagram items
NBatchFormat	Facilitate format operations (mainly with shapes geometry and text block).
NBatchGroup	Facilitate the grouping of shapes (e.g. the creation of a new group from a set of shapes)
NBatchInsert	Facilitate the insertion of multiple elements in one collection.
NBatchLayout	Provides transaction based layout operations. Implements common alignment, resize, horizontal spacing, vertical spacing and center in page operations.
NBatchOperation	Provide miscellaneous transaction based operations, which are not constrained by permissions and purely rely on the type of items inside the batch.
NBatchReorder	Facilitates the reorder of items in their containers (e.g. Z-Order)
NBatchTransform	Facilitates transformation based operations on a set of shapes
NBatchTranslate	Facilitates the translation of multiple items together with their translation slaves
NBatchUngroup	Facilitates the ungrouping of groups (e.g. the destruction of existing groups)

Examples

Format batch example: The following code applies solid red color filling to all selected elements:

C#	Copy Code
// create a new format batch associated with the specified document NBatchFormat batchFormat = new NBatchFormat(m_DrawingDocument); // build it from the active page selection batchFormat.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems); // check if the style of all batch nodes can be changed if (batchFormat.CanFormat()) { // set red fill style to all batch nodes batchFormat.ChangeGeometryFill(new NColorFill(NColor.Red)); }

Copy Code

// create a new format batch associated with the specified document
NBatchFormat batchFormat = new NBatchFormat(m_DrawingDocument);
// build it from the active page selection
batchFormat.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems);
// check if the style of all batch nodes can be changed
if (batchFormat.CanFormat())
{
    // set red fill style to all batch nodes
    batchFormat.ChangeGeometryFill(new NColorFill(NColor.Red));
}

Layout batch example: The following code horizontally aligns the selected nodes to the selection anchor left side:

C#	Copy Code
// get the active page NPage activePage = m_DrawingDocument.Content.ActivePage; // create a new layout batch associated with the specified document NBatchLayout batchLayout = new NBatchLayout(m_DrawingDocument); // build it from the active page selection batchLayout.Build(activePage.Selection.SelectedItems); // check if all batch nodes can be aligned to the selection anchor if (batchLayout.CanAlignHorizontally(activePage.Selection.AnchorItem as NShape)) { // align the lefts of all batch nodes to the selection anchor left side batchLayout.AlignHorizontally(activePage.Selection.AnchorItem as NShape, ENHorizontalAlignment.Left); }

Copy Code

// get the active page
NPage activePage = m_DrawingDocument.Content.ActivePage;
// create a new layout batch associated with the specified document
NBatchLayout batchLayout = new NBatchLayout(m_DrawingDocument);
// build it from the active page selection
batchLayout.Build(activePage.Selection.SelectedItems);
// check if all batch nodes can be aligned to the selection anchor
if (batchLayout.CanAlignHorizontally(activePage.Selection.AnchorItem as NShape))
{
    // align the lefts of all batch nodes to the selection anchor left side
    batchLayout.AlignHorizontally(activePage.Selection.AnchorItem as NShape, ENHorizontalAlignment.Left);
}

Translate batch example: The following code translates the selected elements and their translation slaves:

C#	Copy Code
// create a new translate batch associated with the specified document NBatchTranslate batchTranslate = new NBatchTranslate(m_DrawingDocument); // build it from the active page selection batchTranslate.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems); // check if all batch nodes can be translated with the specified amounts if (batchTranslate.CanTranslate(10, 10, false)) { // translate all batch nodes with the specified amounts batchTranslate.Translate(10, 10, false); }

Copy Code

// create a new translate batch associated with the specified document
NBatchTranslate batchTranslate = new NBatchTranslate(m_DrawingDocument);
// build it from the active page selection
batchTranslate.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems);
// check if all batch nodes can be translated with the specified amounts
if (batchTranslate.CanTranslate(10, 10, false))
{
    // translate all batch nodes with the specified amounts
    batchTranslate.Translate(10, 10, false);
}

Transform batch example: The following code rotates the selected models to 90 degrees:

C#	Copy Code
// create a new transform batch associated with the specified document NBatchTransform batchTransform = new NBatchTransform(m_DrawingDocument); // build it from the view selection batchTransform.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems); // check if all batch nodes can be rotated to 90 degrees if (batchTransform.CanRotate(90)) { // translate all batch nodes with the specified amounts batchTransform.Rotate(90); }

Copy Code

// create a new transform batch associated with the specified document
NBatchTransform batchTransform = new NBatchTransform(m_DrawingDocument);
// build it from the view selection
batchTransform.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems);
// check if all batch nodes can be rotated to 90 degrees
if (batchTransform.CanRotate(90))
{
    // translate all batch nodes with the specified amounts
    batchTransform.Rotate(90);
}

Delete batch example: The following code deletes all selected elements

C#	Copy Code
// create a new delete batch associated with the specified document NBatchDelete batchDelete = new NBatchDelete(m_DrawingDocument); // build it from the view selection batchDelete.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems); // check if the delete operation can be performed if (batchDelete.CanDelete()) { // delete all batch nodes batchDelete.Delete(); }

Copy Code

// create a new delete batch associated with the specified document
NBatchDelete batchDelete = new NBatchDelete(m_DrawingDocument);
// build it from the view selection
batchDelete.Build(m_DrawingDocument.Content.ActivePage.Selection.SelectedItems);
// check if the delete operation can be performed
if (batchDelete.CanDelete())
{
    // delete all batch nodes
    batchDelete.Delete();
}