Application = code + markup Chapter 5-7

The5ChapterStackpanelAndWrappanel

WPFDesigned panelPanelPut space and other elements on the panel.LayoutLayout.

Logical tree of the class:

Frameworkelement
Panel (abstract class)
Canvas
Dockpanel
Grid
Stackpanel
Uniformgrid
Wrappanel

1)Method for retrieving elements:

FrameworkelementOfFindnameMethod to retrieve all elements under the root node:

ButtonBTN = findname ("Buttonname")As Button;

UseChildrenIndex:

Grid. Children [5]; //Returned uielement type

Grid. Children. indexof (BTN );//Returns the index value of the BTN element. If the value does not exist, the value is-1.

You can use the event processor to obtain the object that generates the event in two ways:

ButtonBTN = senderAs Button;//Use the first parameter

ButtonBTN = E. SourceAs Button;//Use the second parameter

AboveCodeCorresponding:

BTN. Click + = buttonclick;

And

VoidButtonclick (ObjectSender,RoutedeventargsE ){}

The event processor is not used.BTN. Click + = buttonclickMethod for eachButtonAdd events instead of using:

Addhandler (Button. Clickevent,New Routedeventhandler(Buttonclick ));

At this time,SenderYesWindowObject, which meansWindowMonitors all its child elementsClickAndE. SourceIt is still the clicked button object.

Of course, you can also make allButtonBearerStackpanelFor monitoring:

Stack. addhandler (Button. Clickevent,New Routedeventhandler(Buttonclick ));

At this time,SenderYesStackpanelObject.

2) UseWrappanelGenerallyScrollviewer:

Scrollviewer scroll =   New Scrollviewer ();
Content = Scroll;
Wrappanel wrap =   New Wrappanel ();
Scroll. Content = Wrap;

3)ForScrollviewerIs a composite control, the arrow of its scroll bar endpoint, isRepeatbutton, This button also hasClickEvent. ThereforeScrollviewerOfClickMethod, to determineE. SourceIs the transformation successful:

Button BTN = E. Source As Button;

If (BTN ! =   Null )
{
//Do something
}

4) Put many elements in a limited space.Scrollviewer,WPFRecommendedViewbox:

Viewbox View =   New Viewbox ();
Content = View;
View. Child = Grid;

6thChapterStackAndWrap

1)Gridsplitter

GridsplitterDerived fromThumb, Can only be used inGridAnd specifyRowAndColumnLocation(And rows and columnsSPAN):

Gridsplitter split =   New Gridsplitter ();
Split. Width =   6 ;
Grid. Children. Add (split );
Grid. setcolumn (split, 2 );
Grid. setrow (split, 1 );

GridsplitterThe same cell can be shared with other elements, which causes the occlusion problem-the later elements appear in front. Therefore, you need to setMarginTo avoid overlap:

Split. Margin =New Thickness(10 );

GenerallyGridsplitterIt is reasonable to span the whole row or the whole column:

Grid. Setrowspan (split, 3 );

Grid. Setcolumnspan (split, 3 );

GenerallyGridsplitterPut them in one or more cells.

2)Uniformgrid

SimilarGridThe difference is that,UniformgridAll rows are equal to width, and all columns are high. You can simply set them as follows:

Uniformgrid unigrid =   New Uniformgrid ();
Unigrid. Rows =   2 ;
Unigrid. Columns =   3 ;

UniformgridThere is no affiliated attribute to specify a position for its internal elements. The index value can only be increased in sequence based on the order of adding elements.

Unigrid. Children. Add (BTN );

The7Chapter

1)PolygonUsage:

PolygonPoly =New Polygon();

Poly. Points =New Pointcollection();

Newly createdPolygonObject, itsPointsThe property isNull. Add a seriesPointHere:

Poly. Points. Add (New Point(0, 0 ));

Poly. Points. Add (New Point(1, 1 ));

Another method is to directly addPointArray:

Poly. Points =   New Pointcollection ( New Point []
{
NewPoint (0,0),
NewPoint (1,1)
} );