WPF game excerpt-map editor (2)

Knowledge Point 1: Line tracing

The carrier of totalwidth * totalheight is divided into rectangular boxes of linecolor of singlewidth * singleheight. The boxes are dashwidth width and clearance dashspace.

/// <Summary>

/// Paint? ? Network bandwidth? Ge? Bianà? Line?

/// </Summary>

Private void setgridlines (canvas carrier, double totalwidth, double totalheight, double singlewidth, double singleheight, color linecolor, double dashwidth, double dashspace ){

// What do you want to do with it ?, Why? Required? Let's take a look at it?

Carrier. Children. Clear ();

Int sectionxnum = (INT) (totalwidth/singlewidth );

Int sectionynum = (INT) (totalheight/singleheight );

For (INT x = 1; x <= sectionxnum; X ++) {// vertical?

Line line = new line (){

X1 = x * singlewidth,

X2 = x * singlewidth,

Y1 = 0,

Y2 = totalheight,

Stroke = new solidcolorbrush (linecolor ),

Strokedasharray = new doublecollection () {dashwidth, dashspace },

};

Carrier. Children. Add (line );

}

For (INT y = 1; y <= sectionynum; y ++) {// ¨?

Line line = new line (){

X1 = 0,

X2 = totalwidth,

Y1 = y * singleheight,

Y2 = y * singleheight,

Stroke = new solidcolorbrush (linecolor ),

Strokedasharray = new doublecollection () {dashwidth, dashspace },

};

Carrier. Children. Add (line );

}

}

Knowledge Point 2: Custom double-click event

Public datetime _ lastclick = datetime. now;
Private bool _ firstclickdone =
False;

Private void mainpage_mouseleftbuttondown (Object sender, mousebuttoneventargs
E)
{
Timespan
SPAN = datetime. Now-_ lastclick;

If (span. totalmilliseconds <300 & _ firstclickdone = true)
{// The two click events do not exceed 0.3 s (of course, you can also try double-click the interval by yourself) + Click the previous one (avoid 3 clicks)

// Double-click trigger

// Double-clickCodeWrite

_ Firstclickdone = false;

}
Else
{// Click it for the first time

_ Firstclickdone = true;

_ Lastclick = datetime. now;

}

Double-click events are two very fast standalone events,

Double-click = two-click interval less than 300 microseconds + previous click

Knowledge Point 3: custom long-Click Event

Private void
Obstructionviewer_previewmousemove (Object
Sender, mouseeventargs e ){

If
(E. leftbutton = mousebuttonstate. Pressed ){

// Code}

}

Long-pressed left-click event = E. leftbutton = mousebuttonstate. pressed

It's easy to see, but it's hard to know.

Knowledge Point 4: The big picture is decomposed into small pictures of the specified size

For (INT x = 0; x
<Sectionxnum; X ++ ){

For
(INT y = 0; y <sectionynum; y ++ ){

Croppedbitmap = new
Croppedbitmap (mapsource, new int32rect (x *
(INT) sectionwidth. Value, y * (INT) sectionheight. Value, (INT) sectionwidth. value,
(INT) sectionheight. Value ));

System. Io. filestream = new
System. Io. filestream (string. Format (@ "{0}/1_11__000022.16.jpg ",
Outputsection. selectedpath, x, y), system. Io. filemode. Create );

Required bitmapencoder encoder = new
Jpegbitmapencoder ();

Encoder. frames. Add (bitmapframe. Create (croppedbitmap ));

Encoder. Save (filestream );

Filestream. Close ();

}

}

1. Obtain the bitmapsource of the specified size from mapsource;
2. Create an event stream, and set the stream location to the saved address;
3. JPG transcoding and conversion;
4. Save

I will not go into details. Let's look at the code and simply follow this process.