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February 13, 2020 16:38
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#sample-img{ | |
display: block; | |
width: 60%; | |
margin: 0 auto; | |
} | |
#canvas{ | |
display: block; | |
width: 30%; | |
margin: 0 auto; | |
} | |
#contrroller{ | |
margin: 15px auto; | |
} | |
.sel-card{ | |
height: 1.5em; | |
vertical-align: middle; | |
} | |
#bt-joker{ | |
display: block; | |
margin-top: 15px; | |
} | |
@media screen and (min-width:481px) { | |
#canvas{ | |
width: 100px; | |
} | |
#contrroller{ | |
text-align: center; | |
} | |
#bt-joker{ | |
margin: 15px auto; | |
} | |
} |
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<canvas id="canvas" width="100px" height="163px"></canvas> | |
<div id="contrroller"> | |
<select id="sel-suit" class="sel-card"> | |
<option value="1">スペード</option> | |
<option value="2">ハート</option> | |
<option value="3">ダイア</option> | |
<option value="4">クラブ</option> | |
</select> | |
<select id="sel-num" class="sel-card"> | |
<option value="1">A</option> | |
<option value="2">2</option> | |
<option value="3">3</option> | |
<option value="4">4</option> | |
<option value="5">5</option> | |
<option value="6">6</option> | |
<option value="7">7</option> | |
<option value="8">8</option> | |
<option value="9">9</option> | |
<option value="10">10</option> | |
<option value="11">J</option> | |
<option value="12">Q</option> | |
<option value="13">K</option> | |
</select> | |
<button id="bt-joker">jokerを表示</button> | |
</div> |
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const unit_w = 100; | |
const unit_h = 162; | |
const can = document.getElementById('canvas'); | |
const ctx = can.getContext('2d'); | |
const imgset = new Image() | |
imgset.addEventListener('load',()=>{ | |
change_card(); | |
}); | |
imgset.src = 'path/to/p-card.png'; | |
const sel_suit = document.getElementById('sel-suit'); | |
const sel_num = document.getElementById('sel-num'); | |
[...document.getElementsByClassName('sel-card')].forEach(sel=>{ | |
sel.addEventListener('change',change_card); | |
}); | |
document.getElementById('bt-joker').addEventListener('click',()=>{ | |
ctx.clearRect(0,0,can.width,can.height); | |
ctx.drawImage(imgset,0,unit_h*4,unit_w,unit_h,0,0,unit_w,unit_h); | |
}); | |
function change_card(){ | |
ctx.clearRect(0,0,can.width,can.height); | |
const sx = (sel_num.value-1) * unit_w; | |
const sy = (sel_suit.value-1) * unit_h; | |
ctx.drawImage(imgset,sx,sy,unit_w,unit_h,0,0,unit_w,unit_h); | |
} |
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