- Tech
- If you need to provide graphical information on the web page ......
JavaScript drawing </ title> <meta http-equiv = "content-type" content = "text / html; charSet = GB2312> <script language =" javascript "> IE4 =! Navigator.appversion.Charat (0) <"4" || navigator.appname == "netscape")</p>
<p>Var XO = 0Var YO = 0Var ox = -1Var = -1</p>
<p>Var rad = math.pi / 180var maxy = 400VAR color = "red"</p>
<p>Function Print (STR) {document.write (STR);} Function Orgy (Y) {Return Maxy-y} Function Outplot (X, Y, W, H) {Print ('<span style = "Position: absolute; Left : ' x '; Top: ' y '; Height: ' h '; width: ' w '; font-size: 1px; Background-Color: ' Color ' "> </ span> '); } function plot (x, y) {OUTPLOT (X, Y, 1, 1) IF (OX> = 0 || OY> = 0) {Showline (OX, OY, X-OX, Y-OY)} ox = x io = y} Function Showline (X, Y, W, H) {IF (W <0) {x = w w = math.abs (w)} IF (h <0) {y = h h = Math.abs (h)} if (w <1) w = 1 IF (h <1) h = 1 OUTPLOT (X, Y, Math.Round (W), Math.Round (H))} Function Lineto (X , Y) {Line (XO, YO, X, Y)} Function Sign (N) {IF (n> 0) Return 1 IF (n <0) Return -1 Return N} Function Line (x1, y1, x2, Y2) {x2 = math.Round (x2) y2 = math.Round (Y2) XO = x2 yo = y2 y1 = orgy (y1) y2 = orgy (y2) var str = "" "" VAR i = 0 var x = x1 VAR Y = Y1 DX = Math.abs (x2-x1) DY = math.abs (Y2-Y1) S1 = SIGN (X2-X1) S2 = SIGN (Y2-Y) IF (DX == 0 || DY = = 0) {Showline (x1, y1, x2-x1, y2-y1) return} if (dx> dy) {TEMP = DX DX = DY DY = Temp key = 1} else key = 0 E = 2 * DY-DX for (i = 0; i <dx; i ) {px = 0 py = 0 Plot (x, y) while (e> = 0) {IF (key == 1) {x = S1 PX = S1} else {y = S2 PY = S2} E = E-2 * DX} if (key == 1) y = S2 else X = S1 E = E 2 * DY}}</p>
<p>Function MoveTo (x, y) {o = io = -1; XO = math.Round (x); yo = math.Round (Y);} / Round Function CIR (X, Y, R) {Moveto (x r, y); for (i = 0; i <= 360; i = 5) {lineto (r * math.cos (i * rad) x, r * math.sin (i * rad) Y) }} // Curved Function ARC (X, Y, R, A1, A2) {MoveTo (r * Math.cos (A1 * RAD) X, R * Math.sin (A1 * RAD) Y); For (i = a1; i <= a2; i ) {lineto (r * math.cos (i * rad) x, r * math.sin (i * rad) y)}} // sector Function Pei ( X, Y, R, A1, A2) {MoveTo (X, Y); for (var i = a1; i <= a2; i ) {lineto (r * math.cos (i * rad) x, r * Math.sin (i * rad) y);} LINETO (x, y);} // pop up fan-shaped Function Poppei (X, Y, R, A1, A2) {dx = r * Math.cos ((A1 ) A2-A1) / 2) * RAD) / 10DY = R * Math.SIN ((A1 (A2-A1) / 2) * rad) / 10X = DXY = DYMOVETO (X, Y) for (var i = A1; I <= a2; i ) {lineto (r * math.cos (i * rad) x, r * math.sin (i * rad) y)} lineto (x, y)}</p>
<p>// Rectangular Function Rect (X, Y, W, H) {Moveto (X, Y); LINETO (X W, Y); LINETO (X W, Y H); LINETO (X, Y H) LINETO (X, Y);</p>
<p>// / 准 function zhunxing (x, y) {var ox = xovar = yovar ket = colorColor = "# 000000" Line (x-5, y, x 6, y) line (x, y-6, x, Y 5) Print ('<span style = "Position: absolute; font-size: 10pt; Left:' (x 5) '; Top:' Orgy (Y 5) ';"> ' x ', ' y '] </ span> ') color = ocolorxo = oxyo =} // Labor Function Biaozhustr (x, y, s) {return' <span style = "Position: absolute; font- Size: 10pt; Left: ' x '; Top: ' Orgy (Y) '; "> ' S ' </ span> '} Function Biaozhu (x, y, s, t) {var ox = xovar OY = YOVAR OCOLOR = ColorPoint = "p01.gif" if (t == 1) {print (Biaozhustr (x-5, y 6, "· s)} = f (t == 2) {Print BIAOZHUSTR (XO X * Math.cos (Y * RAD) -10, YO X * Math.SIN (Y * RAD), S))} color = ocolorXo = oxyo =} </ script> </ head> <body> <table border = "0" width = "100%"> <Tr> <TD width = "100%" style = "font-size: 18pt; color: # ff0000" class = "t1"> JavaScript drawing </ td> </ tr> <tr> <TD width = "100%" style = "font-size: 12pt; color: # 008000" class = "t2"> If you need to provide graphical information on the web, It is usually made into a picture, but the overhead on the network is too big. what else can we do? Here to provide a set of JavaScript functions to solve this problem. Although it is simple, it is still more than enough for the drawing point. </ td> </ tr> </ table></p>
<p><script> if (ie4) {</p>
<p>// Basic Graphic Color = "Maroon" CIR (50, 40, 20) ARC (100, 40, 20, 60, 120, 300) RECT (200, 20, 40, 40)</p>
<p>// Pacing chart color = "# ff0000" VAR JD = New Array (203, 232, 277, 223, 271, 250, 273, 280) MoveTo (30, JD [0] -40) BIAOZHU (XO, Yo, JD [0]) for (i = 1; I <jd. Length; i ) {lineto (i * 30 30, jd [i] -40) BIAOZHU (XO, YO, JD [I], 1)} color = "# c0c0" line (30, 140, i * 30 30, 140) Line (30, 140, 30, 260) // Pie Chart Color = "# 00ff00" VAR GC = New Array (150, 120, 200, 180, 180) VAR S = 0VAR M = 0VAR n = 0for (i = 0; i <gc.length; i ) {s = GC [i] IF (GC [i]> m) {m = GC [i] n = i}} var k = S / 360VAR mm = 0VAR a = 0for (i = 0; i <gc.length; i ) {b = math.Round ((GC [i] mm) / k) IF (i == N) Poppei (600, 150, 100, a, b) elsepe (600, 150, 100, a, b) BIAOZHU (60, A (BA) / 2,math.round (GC [I]/s*100 ) "%", 2)mm = mm gc [i] a = b}</p>
<p>// Cross label Moveto (280, 20) Zhunxing (XO, YO)</p>
<p>} else {document.write ("<p> </ p> <table bgcolor = # ff0000> <tr> <td> <font color = # fff00> Sorry! Your browser cannot support certain features of this page, Please reuse IE4.0 or above browser! Thank you! </ Font> </ td> </ tr> </ table> ")} </ script></p>
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