DiagramPanel

Construct an empty DiagramPanel.

Gets the standard layer used to hold Adornments, which is normally in front of all of the other layers.

Gets or sets how long to wait before autoscrolling.

Gets or sets the margin in the panel where a mouse drag will automatically cause the view to scroll.

Gets or sets how quickly to change the Position when the mouse is in the AutoScrollRegion.

Gets or sets whether the user can scroll horizontally. (Implements IScrollInfo.)

Gets or sets whether the user can scroll vertically. (Implements IScrollInfo.)

Gets the Diagram that this panel is in.

Gets or sets the model-coordinate bounds of the diagram.

Get the vertical size of the scrollable part of this diagram, in control (device independent pixel) units. (Implements IScrollInfo.)

Get the horizontal size of the scrollable part of this diagram, in control (device independent pixel) units. (Implements IScrollInfo.)

Gets or sets a fixed bounding rectangle to be returned by ComputeDiagramBounds.

Gets or sets how the parts are positioned in the panel when the DiagramBounds width is smaller than the ViewportWidth.

Gets the horizontal offset of the diagram's parts. (Implements IScrollInfo.)

Gets or sets the largest value that Scale may take.

Gets or sets the smallest value greater than zero that Scale may take.

Gets or sets the amount of extra "empty" space is reserved around the DiagramBounds.

Gets or sets the point, in model coordinates, shown at the top-left corner of this panel.

Gets or sets the scale factor at which everything is rendered.

Gets or sets the size of a "line" when scrolling horizontally.

Gets or sets the ScrollViewer that lets the user scroll this panel. (Implements IScrollInfo.)

Gets or sets the size of a "line" when scrolling vertically.

Gets or sets how the panel's Scale property is set, depending on the size of the DiagramBounds.

Gets or sets how the parts are positioned in the panel when the DiagramBounds width is smaller than the ViewportWidth.

Gets the vertical offset of the diagram's parts. (Implements IScrollInfo.)

Gets the visible part of this panel, in model coordinates.

Get the vertical size of the visible part of this panel, in control (device independent pixel) units. (Implements IScrollInfo.)

Get the horizontal size of the visible part of this panel, in control (device independent pixel) units. (Implements IScrollInfo.)

Gets or sets the apparent focus point used when zooming in or out.

Gets or sets how quickly to change the Scale and/or Position properties when adapting to DiagramBounds changes or panel size changes causing content re-alignment, or in calls to Rect) or Action).

Arrange each of the Layers in this panel.

finalSize

Center a Part's bounds within this viewport.

part

Center a Part's bounds within this viewport.

part

afterwards

an Action to be performed after the animation is finished; may be null

Center a particular area of the diagram within this viewport.

bounds

a Rect in model coordinates

afterwards

an Action to be performed after the animation is finished; may be null

This method is called to determine the next position in the document for this view, given a point at which the user is dragging the mouse.

viewPnt

The mouse point, in control coordinates.

Compute the bounding rectangle that surrounds a given collection of parts.

parts

返回值: the union of the Bounds of all of the parts in , or Rect.Empty if there are no parts

This is called by UpdateDiagramBounds to determine a new value for DiagramBounds.

返回值: a Rect in model coordinates

Create the GridPattern for the whole diagram, using the GridPatternTemplate data template.

返回值: the unbound Node holding the GridPattern

Start or continue automatically scrolling the view during a mouse drag.

modelPnt

the current mouse point, in model coordinates

This overridable method changes the Position so that the given element becomes visible in the viewport.

elt

a UIElement that is in the visual tree of this panel

rectangle

The region of the element to bring into view; if this is empty, this defaults to the element's parent Part's Bounds.

Search all parts that are at a given point that meet a given predicate, and return the first element that matches.

p

a Point in model coordinates

navig

This is a function that is given an element at the given point and returns an element of type to be considered by the predicate . Typically the function will find the ancestor Part or Node.

pred

This is a predicate that is given an element of type ; If the predicate returns true, this method returns that element; if it returns false, the search continues for elements at the given point. If this predicate argument is null, no filtering of elements is done -- the first one found is returned.

layers

The kinds of Layers to search in. For example, if you are looking for a Node, using the value Nodes, this will speed up the search by ignore layers containing Links.

返回值: an element of type , or null if none is found

Search all parts that are at a given point that meet a given predicate, and return a collection of elements that match.

p

a Point in model coordinates

navig

This is a function that is given an element at the given point and returns an element of type to be considered by the predicate . Typically the function will find the ancestor Part or Node.

pred

This is a predicate that is given an element of type ; if the predicate returns true, this method includes that element in its results. If this predicate argument is null, no filtering of elements is done -- all are included.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: a perhaps empty collection of elements of type

Find elements that are within a rectangle.

rect

a Rect in model coordinates

navig

This is a function that is given an element at the given point and returns an element of type to be considered by the predicate . Typically the function will find the ancestor Part or Node.

pred

This is a predicate that is given an element of type ; if the predicate returns true, this method includes that element in its results.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: a perhaps empty collection of elements of type

Find elements that are within a distance of a point.

p

a Point in model coordinates

dist

the distance, in model coordinates

navig

This is a function that is given an element at the given point and returns an element of type to be considered by the predicate . Typically the function will find the ancestor Part or Node.

pred

This is a predicate that is given an element of type ; if the predicate returns true, this method includes that element in its results.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: an element of type , or null if none is found

Search all parts that are at inside a given geometry that meet a given predicate, and return a collection of elements that match.

geo

a Geometry in model coordinates

navig

This is a function that is given an element at the given point and returns an element of type to be considered by the predicate . Typically the function will find the ancestor Part or Node.

pred

This is a predicate that is given an element of type ; if the predicate returns true, this method includes that element in its results.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: a perhaps empty collection of elements of type

Find a Layer of the given type with exactly the same Id as the given .

name

Return the front-most Part that is at a given point.

p

a Point in model coordinates

pred

This is a predicate that is given an part of type ; if the predicate returns true, this method returns that part. If this argument is null, this returns the first part it finds at the point.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: null if no such part is found

Return all of the Parts that are at a given point.

p

a Point in model coordinates

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: All of the Parts of the given type that are at the Point and that are in the kinds of layers indicated by . This returns an empty list if no qualifying parts are found.

Find parts that are within a rectangle.

rect

a Rect in model coordinates

srch

Which kinds of parts to include; a typical value might be SelectableParts.

overlap

The required geometric relationship with the part; the typical value is Inside.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

Find parts that are near a point.

p

a Point in model coordinates

dist

the distance, in model coordinates

srch

Which kinds of parts to include; a typical value might be SelectableParts.

overlap

The required geometric relationship with the part; the typical value is Inside.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

Search all parts that are at inside a given geometry that meet certain criteria and return a collection of those that match.

geo

a Geometry in model coordinates

srch

Which kinds of parts to include; a typical value might be SelectableParts.

overlap

The required geometric relationship with the geometry; the typical value is Inside.

layers

The kinds of Layers to search in. For example, if you are looking for Nodes, using the value Nodes, this will speed up the search by ignoring layers containing Links.

返回值: a perhaps empty collection of elements of type

Find a Layer of the given type with exactly the same Id as the given , or return a default layer of the given type.

name

If there are no Layers in this panel's collection of Children, create the standard set of layers.

This predicate is true if the mouse button event represents a double-click.

e

Returns true if there are any nodes within or intersecting the given rectangular region.

r

a Rect in model coordinates

skip

a predicate that should return true for nodes to be ignored when checking for collisions, usually the node in the document that you are considering moving; may be null to consider all non-temporary nodes

Increases the VerticalOffset by ScrollVerticalLineChange. (Implements IScrollInfo.)

Decreases the HorizontalOffset by ScrollHorizontalLineChange. (Implements IScrollInfo.)

Increases the HorizontalOffset by ScrollHorizontalLineChange. (Implements IScrollInfo.)

Decreases the VerticalOffset by ScrollVerticalLineChange. (Implements IScrollInfo.)

Return a bitmap showing the parts in a particular area, drawn at a given scale.

bmpsize

the size of the resulting bitmap

dpi

bitmap resolution

viewpos

a Point in model coordinates

scale

a value of 1.0 is normal; the value must be a positive number. Smaller values produce smaller-looking parts.

返回值: a BitmapSource

Generates a bitmap displaying the parts currently visible in the diagram.

返回值: a BitmapSource

Return a bitmap showing the parts in a particular area, drawn at a given scale.

bmpsize

the size of the resulting bitmap, rounded up to the nearest integer

dpi

bitmap resolution

viewpos

a Point in model coordinates for the top-left corner of the area to be rendered

scale

a value of 1.0 is normal; the value must be a positive number. Smaller values produce smaller-looking parts.

act

an Action taking the BitmapSource to be performed later; this may be null

返回值: a BitmapSource

Scroll the diagram so that a given element () is in the viewport. (Implements IScrollInfo.)

visual

rectangle

The region of the element to bring into view. This value is normally Rect.Empty, meaning as much of the whole visual element as will fit into the viewport.

返回值: the result of calling Rect)

Measure each of the Layers in this panel.

availableSize

Increases the VerticalOffset by ScrollVerticalLineChange times the number of lines to scroll for mouse wheel rotation. (Implements IScrollInfo.)

Decreases the HorizontalOffset by ScrollHorizontalLineChange times the number of lines to scroll for mouse wheel rotation. (Implements IScrollInfo.)

Increases the HorizontalOffset by ScrollHorizontalLineChange times the number of lines to scroll for mouse wheel rotation. (Implements IScrollInfo.)

Decreases the VerticalOffset by ScrollVerticalLineChange times the number of lines to scroll for mouse wheel rotation. (Implements IScrollInfo.)

This overridable method is called when the DiagramBounds or HorizontalContentAlignment or VerticalContentAlignment or Stretch properties change.

Raise the DiagramBoundsChanged event.

e

Handle a DragEnter event.

e

Handle a DragLeave event.

e

Handle a DragOver event.

e

Handle a Drop event.

e

Handle a GiveFeedback event.

e

This overridable method is called after the first layout has been performed and the DiagramBounds has been computed.

This overridable method is called after each layout has been performed and the DiagramBounds has been computed.

Handle the event when mouse capture is lost.

e

Handle a mouse down event.

e

Handle a mouse enter event.

e

Handle a mouse move event.

e

Handle a mouse up event.

e

Handle a mouse wheel event.

e

This overridable method is called when the Position changes.

oldpos

a Point in model coordinates

newpos

a Point in model coordinates

Handle a QueryContinueDrag event.

e

This overridable method is called when the Scale changes.

oldscale

a double

newscale

a double

This overridable method is called when the panel's actual size changes.

oldsize

a Size in element coordinates

newsize

a Size in element coordinates

Raise the ViewportBoundsChanged event.

e

Every DiagramPanel should be in the visual tree of a Diagram.

oldParent

Increases the VerticalOffset by ViewportHeight. (Implements IScrollInfo.)

Decreases the HorizontalOffset by ViewportWidth. (Implements IScrollInfo.)

Increases the HorizontalOffset by ViewportWidth. (Implements IScrollInfo.)

Decreases the VerticalOffset by ViewportHeight. (Implements IScrollInfo.)

Simulate some mouse events.

modifiers

a GestureModifiers value, some combination of Control, Shift, and Alt

action

a Gesture value, typically MouseLeftButton; a value of None does nothing

down

the Point in model coordinates for the mouse down event; this value must be within the ViewportBounds

up

the Point in model coordinates for the mouse up event; this value must be within the ViewportBounds

other

The Diagram where the mouse up occurs. If this is different from this panel's Diagram, a simulated drag-and-drop will occur. (This does not use real Windows drag-and-drop in WPF.) This may be null to use this panel's diagram, thus keeping the whole gesture within this one diagram.

Change the value of HorizontalOffset by changing the value of Position. (Implements IScrollInfo.)

offset

Set the Scale and Position properties with animation.

newscale

the new positive double value for Scale

newpos

the new Point value for Position

animationtime

a time in milliseconds; if a very short time, no animation occurs and the properties are simply set

act

an Action to perform after the animation is finished; null to do nothing afterwards

Change the value of VerticalOffset by changing the value of Position. (Implements IScrollInfo.)

offset

Stop any ongoing auto-scroll action.

Convert a Point in model coordinates to element coordinates.

p

Convert a Point in element coordinates to model coordinates.

p

Request that the DiagramBounds value be updated, with a call to ComputeDiagramBounds.

Change the Scale so that everything within the DiagramBounds fits within the viewport.

Change the Scale so that everything within the DiagramBounds fits within the viewport.

policy

normally a value of Uniform, but may be UniformToFill

afterwards

an Action to be performed after the animation is finished; may be null

This event occurs when the diagram's bounds or alignment changes.

This event occurs when the viewport changes.

Identifies the AutoScrollDelay dependency property.

Identifies the AutoScrollRegion dependency property.

Identifies the AutoScrollTime dependency property.

Identifies the CanHorizontallyScroll dependency property.

Identifies the CanVerticallyScroll dependency property.

Identifies the DiagramBoundsChanged routed event.

Identifies the DiagramBounds dependency property.

Identifies the FixedBounds dependency property.

Identifies the HorizontalContentAlignment dependency property.

Identifies the MaximumScale dependency property.

Identifies the MinimumScale dependency property.

Identifies the Padding dependency property.

Identifies the Position dependency property.

Identifies the Scale dependency property.

Identifies the ScrollHorizontalLineChange dependency property.

Identifies the ScrollOwner dependency property.

Identifies the ScrollVerticalLineChange dependency property.

Identifies the Stretch dependency property.

Identifies the VerticalContentAlignment dependency property.

Identifies the ViewportBoundsChanged routed event.

Identifies the ZoomPoint dependency property.

Identifies the ZoomTime dependency property.