{"id":351,"date":"2020-07-25T10:43:33","date_gmt":"2020-07-25T01:43:33","guid":{"rendered":"https:\/\/blog.wsd.sh\/?p=351"},"modified":"2020-07-25T10:43:33","modified_gmt":"2020-07-25T01:43:33","slug":"09-10-javascript-%e5%a4%89%e6%9b%b4","status":"publish","type":"post","link":"https:\/\/blog.wsd.sh\/?p=351","title":{"rendered":"09->10 JavaScript \u5909\u66f4"},"content":{"rendered":"<p>1. canvas.js<br \/>\n1.1 \u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5909\u6570\u5ba3\u8a00\u3001\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u306e\u5ba3\u8a00\u3092\u3092root\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u79fb\u52d5<\/p>\n<p>before:<\/p>\n<pre>\r\n    \/\/ \u5909\u6570\u5ba3\u8a00\r\n        var cnvColor = \"255, 0, 0, 1\";  \/\/ \u7dda\u306e\u8272\r\n        var cnvBold = 5;  \/\/ \u7dda\u306e\u592a\u3055\r\n        var bgColor = \"transparent\";\r\n\r\n    \/\/ canvas\u306e\u80cc\u666f\u8272\u3092\u8a2d\u5b9a(\u6307\u5b9a\u304c\u306a\u3044\u5834\u5408\u306bjpeg\u4fdd\u5b58\u3059\u308b\u3068\u80cc\u666f\u304c\u9ed2\u306b\u306a\u308b)\r\n       root.setBgColor(bgColor);\r\n\r\n    \/\/ canvas\u4e0a\u3067\u306e\u30a4\u30d9\u30f3\u30c8\r\n        function _mouseMove(e){\r\n                root.draw(e.offsetX, e.offsetY, cnvBold, cnvColor);\r\n        }\r\n        root.canvas.onmousedown = function(e){\r\n                \/\/ \u30de\u30a6\u30b9\u62bc\u4e0b\u958b\u59cb\r\n                root.drawStart(e.offsetX, e.offsetY, cnvBold, cnvColor);\r\n                root.canvas.addEventListener(\"mousemove\" , _mouseMove, false);\r\n        }\r\n        root.canvas.onmouseup = function(){\r\n                \/\/ \u30de\u30a6\u30b9\u62bc\u4e0b\u7d42\u4e86\r\n                root.canvas.removeEventListener(\"mousemove\" , _mouseMove, false);\r\n        }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\nroot = {\r\n\r\n    \/\/ \u5909\u6570\u5ba3\u8a00\r\n        \"cnvColor\" : \"255, 0, 0, 1\",  \/\/ \u7dda\u306e\u8272\r\n        \"cnvBold\" : 5,  \/\/ \u7dda\u306e\u592a\u3055\r\n        \"bgColor\" : \"transparent\",\r\n\r\n\r\n        \/\/ ccanvas\u306e\u521d\u671f\u5316\r\n        \"init\":function () {\r\n                this.canvas = document.getElementById('canvas');\r\n                this.ctx = this.canvas.getContext('2d');\r\n\r\n                this.setBgColor(this.bgColor);\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000this.canvas.onmousedown\t=\tfunction(e){\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\t\u30de\u30a6\u30b9\u62bc\u4e0b\u958b\u59cb\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000root.drawStart(e.offsetX,\te.offsetY,\troot.cnvBold,\troot.cnvColor);\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000root.canvas.addEventListener(\"mousemove\"\t,root.mouseMove,\tfalse);\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000this.canvas.onmouseup\t=\tfunction(){\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\/\/\t\u30de\u30a6\u30b9\u62bc\u4e0b\u7d42\u4e86\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000root.canvas.removeEventListener(\"mousemove\"\t,\troot.mouseMove,\tfalse);\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000}\r\n         },\r\n        root.canvas.onmousedown = function(e){\r\n                \/\/ \u30de\u30a6\u30b9\u62bc\u4e0b\u958b\u59cb\r\n                root.drawStart(e.offsetX, e.offsetY, cnvBold, cnvColor);\r\n                root.canvas.addEventListener(\"mousemove\" , _mouseMove, false);\r\n        }\r\n        root.canvas.onmouseup = function(){\r\n                \/\/ \u30de\u30a6\u30b9\u62bc\u4e0b\u7d42\u4e86\r\n                root.canvas.removeEventListener(\"mousemove\" , _mouseMove, false);\r\n        }\r\n<\/pre>\n<p>1.2 cnvColor \u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5909\u6570\u5ba3\u8a00\u304b\u3089root\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u79fb\u52d5\u3057\u305f\u306e\u306b\u5408\u308f\u305b\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3059\u308b\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092\u5b9a\u7fa9\u3057\u305d\u306e\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092\u7528\u3044\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3059\u308b<\/p>\n<p>before:<\/p>\n<pre>\r\n    \/\/ \u5909\u6570\u5ba3\u8a00\r\n        var cnvColor = \"255, 0, 0, 1\";  \/\/ \u7dda\u306e\u8272\r\n\r\n                        c_elms[j].onclick = function() {\r\n                                cnvColor = this.getAttribute( \"data-color\" ) ;\r\n                                console.log(\"cnvColor =\"+cnvColor );\r\n                        }\r\n\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\nroot = {\r\n        \"cnvColor\" : \"255, 0, 0, 1\",  \/\/ \u7dda\u306e\u8272\r\n\r\n\u3000\u3000\u3000\u3000\u30fb\u30fb\u30fb\r\n\r\n        \"setCnvColor\": function (cnvColor) {\r\n                this.cnvColor = cnvColor;\r\n        },\r\n\r\n<\/pre>\n<p>1.3  cnvBold \u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5909\u6570\u5ba3\u8a00\u304b\u3089root\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u79fb\u52d5\u3057\u305f\u306e\u306b\u5408\u308f\u305b\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3059\u308b\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092\u5b9a\u7fa9\u3057\u305d\u306e\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092\u7528\u3044\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3059\u308b<\/p>\n<p>before:<\/p>\n<pre>\r\n    \/\/ \u5909\u6570\u5ba3\u8a00\r\n        var cnvBold = 5;  \/\/ \u7dda\u306e\u592a\u3055\r\n\r\n                        b_elms[j].onclick = function() {\r\n                                cnvBold = this.getAttribute( \"data-bold\" ) ;\r\n                                console.log(\"cnvBold =\"+cnvBold );\r\n                        }\r\n\r\n\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n                        c_elms[j].onclick = function() {\r\n                                let cnvColor = this.getAttribute( \"data-color\" ) ;\r\n                                console.log(\"cnvColor =\"+cnvColor );\r\n\r\n                                root.setCnvColor(cnvColor);\r\n                        }\r\n\r\n\u3000\u3000\u3000\u3000\u30fb\u30fb\u30fb\r\n\r\nroot = {\r\n        \"cnvBold\" : 5,  \/\/ \u7dda\u306e\u592a\u3055\r\n\r\n\u3000\u3000\u3000\u3000\u30fb\u30fb\u30fb\r\n\r\n        \"setCnvBold\": function (cnvBold) {\r\n                this.cnvBold = cnvBold;\r\n        }\r\n\r\n<\/pre>\n<p>1.4  cnvBold \u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5909\u6570\u5ba3\u8a00\u304b\u3089root\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u79fb\u52d5\u3057\u305f\u306e\u306b\u5408\u308f\u305b\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3059\u308b\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092\u5b9a\u7fa9\u3057\u305d\u306e\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092\u7528\u3044\u3066\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u64cd\u4f5c\u3059\u308b<\/p>\n<p>before:<\/p>\n<pre>\r\n    \/\/ \u63cf\u753b\u30af\u30ea\u30a2\r\n        var clear = document.getElementById(\"clear\");\r\n        clear.onclick = function(){\r\n                const cnvWidth = 500;\r\n                const cnvHeight = 500;\r\n                root.ctx.clearRect(0,0,cnvWidth,cnvHeight);\r\n                root.setBgColor(bgColor);\r\n        }\r\n\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n    \/\/ \u63cf\u753b\u30af\u30ea\u30a2\r\n        var clear = document.getElementById(\"clear\");\r\n        clear.onclick = function(){\r\n                root.ctx.clearRect(0, 0, root.cnvWidth, root.cnvHeight);\r\n                root.setBgColor(root.bgColor);\r\n        }\r\n\r\n\u3000\u3000\u3000\u3000\u30fb\u30fb\u30fb\r\n\r\nroot = {\r\n\r\n\u3000\u3000\u3000\u3000\u30fb\u30fb\u30fb\r\n\r\n        \"cnvWidth\" : 500,\r\n        \"cnvHeight\" : 500,\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1. canvas.js 1.1 \u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u5909\u6570\u5ba3\u8a00\u3001\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u306e\u5ba3\u8a00\u3092\u3092root\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306b\u79fb\u52d5 before: \/\/ \u5909\u6570\u5ba3\u8a00 var cnvColor = &#8220;255, 0, 0, 1&#8221;; \/\/ \u7dda\u306e\u8272 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/351"}],"collection":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=351"}],"version-history":[{"count":1,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/351\/revisions"}],"predecessor-version":[{"id":352,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/351\/revisions\/352"}],"wp:attachment":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}