Pratinjau efek :
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<title>Gradien warna JavaScript dan efek gradien</title>
<skrip tipe="teks/javascript">
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</skrip>
<skrip tipe="teks/javascript">
//Dapatkan metode gradien warna
var ColorGrads = (fungsi(){
//Dapatkan data gradien warna
function GetStep(mulai, akhir, langkah) {
var warna = [], mulai = GetColor(mulai), akhir = GetColor(akhir),
langkahR = (akhir[0] - mulai[0]) / langkah,
langkahG = (akhir[1] - mulai[1]) / langkah,
langkahB = (akhir[2] - mulai[2]) / langkah;
//Hasilkan koleksi warna
for(var i = 0, r = mulai[0], g = mulai[1], b = mulai[2]; i < langkah; i++){
warna[i] = [r, b, b]; r += langkahR;
}
warna[i] = akhir;
//Nilai warna yang benar
kembalikan $$A.peta(warna, fungsi(x){ kembalikan $$A.peta(x, fungsi(x){
return Math.min(Math.max(0, Math.floor(x)), 255);
});});
}
//Dapatkan data warna
fragmen var;
fungsi GetColor(warna) {
var ret = GetData(warna);
jika (ret === tidak terdefinisi) {
jika (!frag) {
frag = dokumen.createElement("textarea");
frag.style.display = "tidak ada";
document.body.insertBefore(frag, document.body.childNodes[0]);
};
coba { frag.style.color = warna; } catch(e) { return [0, 0, 0];
if (dokumen.defaultView) {
//opera #rrggbb
ret = GetData(document.defaultView.getComputedStyle(frag, null).color);
} kalau tidak {
warna = frag.createTextRange().queryCommandValue("ForeColor");
ret = [ warna & 0x0000ff, (warna & 0x00ff00) >>> 8, (warna & 0xff0000) >>> 16 ];
}
}
kembali mundur;
}
//Dapatkan susunan warna
fungsi GetData(warna) {
var re = RegExp;
if (/^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i.test(warna)) {
//#rrggbb
kembalikan $$A.peta([ re.$1, re.$2, re.$3 ], function(x){
kembalikan parseInt(x, 16);
});
} else if (/^#([0-9a-f])([0-9a-f])([0-9a-f])$/i.test(warna)) {
//#rgb
kembalikan $$A.peta([ re.$1, re.$2, re.$3 ], function(x){
kembalikan parseInt(x + x, 16);
});
} else if (/^rgb((.*),(.*),(.*))$/i.test(warna)) {
//rgb(n,n,n) atau rgb(n%,n%,n%)
kembalikan $$A.peta([ re.$1, re.$2, re.$3 ], function(x){
kembalikan x.indexOf("%") > 0 ? parseFloat(x, 10) * 2,55 : x |.
});
}
}
fungsi pengembalian(warna, langkah){
var ret = [], len = warna.panjang;
jika ( langkah === tidak terdefinisi ) { langkah = 20 }
jika (len == 1) {
ret = GetStep( warna[0], warna[0], langkah );
} lain jika ( len > 1 ) {
untuk(var i = 0, n = len - 1; saya < n; i++){
var langkah = GetStep( warna[i], warna[i+1], langkah );
i < n - 1 && langkah.pop();
ret = ret.concat(langkah);
}
}
kembali mundur;
}
})();
//Objek gradien
var ColorTrans = fungsi(elemen, opsi){
this._elem = $$(elem);
this._timer = null;//Timer
ini._index = 0;//Index
this._colors = [];//Koleksi warna
this._options = {};//Objek parameter
this._setOptions(pilihan);
this.speed = Math.abs(this.options.speed);
this.style = ini.pilihan.gaya;
ini.reset({
dari: ini.pilihan.dari ||.$$D.getStyle(ini._elem, ini.gaya),
ke: ini.pilihan.ke,
langkah: Math.abs(ini.pilihan.langkah)
});
ini._set();
};
ColorTrans.prototipe = {
//Setel properti default
_setOptions: fungsi(pilihan) {
this.options = {//Nilai default
dari: "",//Warna awal (nilai kosong default untuk memfasilitasi perolehan otomatis)
ke: "#000",//Warna akhir
langkah: 20,//seri Gradien
kecepatan: 20,//kecepatan gradien
gaya: "warna"//Atur atribut (Atribut skrip)
};
$$.extend(ini.pilihan, pilihan || {});
},
//Setel ulang koleksi warna
setel ulang: fungsi(pilihan) {
//Atur properti berdasarkan parameter
this._options = opsi = $$.extend( this._options, opsi || {} );
//Dapatkan koleksi warnanya
this._colors = ColorGrads( [ pilihan.dari, pilihan.ke ], pilihan.langkah );
ini._index = 0;
},
//Warna memudar
transIn: fungsi() {
ini.berhenti(); ini._index++; ini._set();
if(indeks_ini < ini._warna.panjang - 1){
this._timer = setTimeout($$F.bind( this.transIn, this ), this.speed);
}
},
// Warna memudar
transOut: fungsi() {
ini.berhenti(); ini._index--; ini._set();
jika(ini._index > 0){
this._timer = setTimeout($$F.bind( this.transOut, this ), this.speed);
}
},
//Pengaturan warna
_set: fungsi() {
var color = this._colors[Math.min(Math.max(0, this._index), this._colors.length - 1)];
this._elem.style[this.style] = "rgb(" + color.join(",") + ")";
},
//berhenti
berhenti: fungsi() {
clearTimeout(ini._timer);
}
};
</skrip>
</kepala>
<tubuh>
<gaya tipe="teks/css">
#idGrads div{height:1px;overflow:hidden;}
</gaya>
Demonstrasi perubahan gradien warna:
<div id="idGrads"> </div>
<Br />
<input id="idGradsColor" type="text" value="hijau"/>
<input id="idGradsSet" type="button" value="Atur warna">
<skrip>
($$("idGradsSet").onclick = fungsi(){
var warna = ColorGrads( ["#fff", $$("idGradsColor").value], 50 );
$$("idGrads").innerHTML = $$A.map(colors.concat().concat(colors.reverse()), function(x){
return "<div style='background:rgb(" + x.join(",") + ")'></div>";
}).bergabung("");
})()
</skrip>
<Br />
<Br />
<gaya tipe="teks/css">
#idPicker ul{float:kiri;}
#idPicker li{overflow:hidden;width:10px;height:10px;line-height:0;font-size:0;}
#idPicker li.on{width:8px;height:8px; border:1px solid #000;}
#idPicker ul, #idPicker li{list-style:none;margin:0;padding:0;}
#idPicker:after{content:".";display:block;visibility:hidden;height:0;clear:both;}
#idPicker{zoom:1;}
</gaya>
Pemilih warna sederhana: <Br />
Pilih warna: <span id="idPickerShow"> </span>
<div id="idPicker"> </div>
<skrip>
$$("idPicker").innerHTML = "<ul>" +
$$A.peta(ColorGrads( ["merah", "kuning", "biru"], 10 ), function(x){
kembalikan $$A.map(ColorGrads( ["#fff", "rgb(" + x.join(",") + ")" ,"#000"], 10 ),
fungsi(x){
return "<li style='background:rgb(" + x.join(",") + ")'></li>";
}
).bergabung("");
}).join("</ul><ul>") + "</ul>";
var oPickerShow = $$("idPickerShow");
$$A.forEach($$("idPicker").getElementsByTagName("li"), function(li){
li.onmouseover = fungsi(){
this.className = "aktif";
oPickerShow.innerHTML = oPickerShow.style.backgroundColor
= ini.gaya.warna latar;
}
li.onmouseout = fungsi(){ this.className = ""; }
})
</skrip>
<Br />
<Br />
<gaya tipe="teks/css">
#idMenu{ latar belakang:#DBDBDB;perataan teks:tengah;tinggi garis:25px; tata letak tabel:tetap;}
#idMenu td{ kursor:penunjuk; warna:#666; latar belakang:#f6f6f6;}
</gaya>
Menu gradien warna:
<tabel id="idMenu" width="600" border="0" Cellspacing="5" cellpadding="0">
<tr>
<td> <a href=" http://www.cnblogs.com/cloudgamer/archive/2008/07/21/ImgCropper.html">Pemotong</a></td >
<td> <a href=" http://www.cnblogs.com/cloudgamer/archive/2009/01/06/Tween.html">Tween</a></td >
<td> <a href=" http://www.cnblogs.com/cloudgamer/archive/2008/12/24/Slider.html">Penggeser</a></td >
<td> <a href=" http://www.cnblogs.com/cloudgamer/archive/2008/12/03/Resize.html">Ubah ukuran</a></td >
<td> <a href=" http://www.cnblogs.com/cloudgamer/archive/2008/11/17/Drag.html">Seret</a></td >
<td> <a href=" http://www.cnblogs.com/cloudgamer/archive/2009/07/07/FixedTips.html">Keterangan alat</a></td >
</tr>
</tabel>
<skrip>
$$A.forEach($$("idMenu").getElementsByTagName("td"), function(x, i){
var a = x.getElementsByTagName("a")[0], href = a.href, txt = a.innerHTML;
x.onclick = fungsi(){ lokasi.href = href;
x.innerHTML = txt;
var ct1 = new ColorTrans(x, { ke: "putih" });
var ct2 = new ColorTrans(x, { ke: "rgb(20,150,0)", gaya: "backgroundColor" });
x.onmouseover = fungsi(){ ct1.transIn();
x.onmouseout = fungsi(){ ct1.transOut();
})
</skrip>
<Br />
<Br />
<gaya tipe="teks/css">
#idAcak{padding:10px; latar belakang:#CCC warna:#fff;}
</gaya>
Klik pada gradien warna acak:
<div id="idRandom"><b>Klik untuk mengubah warna secara acak</b></div>
<skrip>
var ctRandom = New ColorTrans("idRandom", { gaya: "backgroundColor" }),
ctRandom2 = WarnaTrans baru("idRandom");
$$("idRandom").onclick = fungsi(){
var rgb = $$A.peta([1,1,1], fungsi(){ return Math.floor((Math.random() * 255)); } ),
rgb2 = $$A.peta(rgb, fungsi(x){ kembalikan 255 - x; } );
ctRandom.reset({ dari: this.style.backgroundColor, ke: "rgb(" + rgb.join(",") + ")" })
ctRandom.transIn();
ctRandom2.reset({ dari: this.style.color, ke: "rgb(" + rgb2.join(",") + ")" })
ctRandom2.transIn();
}
</skrip>
</tubuh>
</html>