回答編集履歴
2
コード修正
test
CHANGED
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@@ -32,16 +32,6 @@
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```JavaScript
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34
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35
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<html>
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36
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-
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37
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<head><script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script></head>
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38
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-
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<body>
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<script type="text/javascript">
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$(document).ready(function(){
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var borderWidth = 5;
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var fromX;
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@@ -62,6 +52,10 @@
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drawFlag = true;
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fromX = e.pageX - $(this).offset().left - borderWidth;
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fromY = e.pageY - $(this).offset().top - borderWidth;
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context.beginPath(); //追加
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context.moveTo(fromX, fromY); //追加
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@@ -69,10 +63,6 @@
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context.strokeStyle = pale; //追加
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context.lineWidth = penWidth; //追加
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-
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fromX = e.pageX - $(this).offset().left - borderWidth;
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fromY = e.pageY - $(this).offset().top - borderWidth;
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return false; // for chrome
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@@ -140,14 +130,4 @@
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130
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});
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</script>
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<canvas width="780" height="400"></canvas>
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</body>
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</html>
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-
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133
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```
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1
コード修正
test
CHANGED
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@@ -23,3 +23,131 @@
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```
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※何度も同じ記述が出てきて格好は悪いですが、とりあえず動作するのではないかと思います。
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修正コードを追記します。これでどうでしょう？
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32
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33
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```JavaScript
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34
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35
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<html>
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36
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37
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<head><script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script></head>
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38
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<body>
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40
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<script type="text/javascript">
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$(document).ready(function(){
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var borderWidth = 5;
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var fromX;
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var fromY;
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var drawFlag = false;
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var context = $("canvas").get(0).getContext('2d');
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var pale = '#ff25a8'; //色
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var penWidth = 20; //太さ
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$('canvas').mousedown(function(e) {
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drawFlag = true;
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context.beginPath(); //追加
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context.moveTo(fromX, fromY); //追加
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context.strokeStyle = pale; //追加
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context.lineWidth = penWidth; //追加
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fromX = e.pageX - $(this).offset().left - borderWidth;
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fromY = e.pageY - $(this).offset().top - borderWidth;
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return false; // for chrome
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});
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$('canvas').mousemove(function(e) {
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if (drawFlag) {
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draw(e);
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}
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});
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$('canvas').on('mouseup', function() {
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drawFlag = false;
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context.closePath(); //追加
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});
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103
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105
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$('canvas').on('mouseleave', function() {
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drawFlag = false;
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109
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context.closePath(); //追加
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110
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111
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});
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112
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113
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114
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115
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function draw(e) {
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116
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var toX = e.pageX - $('canvas').offset().left - borderWidth;
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118
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119
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var toY = e.pageY - $('canvas').offset().top - borderWidth;
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120
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121
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// context.strokeStyle = pale; 削除
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122
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123
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// context.lineWidth = penWidth; 削除
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// context.beginPath(); 削除
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126
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127
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// context.moveTo(fromX, fromY); 削除
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128
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context.lineTo(toX, toY);
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context.stroke();
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fromX = toX; //追加
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fromY = toY; //追加
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// context.closePath(); 削除
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}
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140
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});
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</script>
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144
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145
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146
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147
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<canvas width="780" height="400"></canvas>
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148
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149
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</body>
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150
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151
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</html>
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152
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153
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```
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