{"id":347,"date":"2020-07-25T10:42:37","date_gmt":"2020-07-25T01:42:37","guid":{"rendered":"https:\/\/blog.wsd.sh\/?p=347"},"modified":"2020-07-25T10:42:37","modified_gmt":"2020-07-25T01:42:37","slug":"05-06-javascript-%e5%a4%89%e6%9b%b4","status":"publish","type":"post","link":"https:\/\/blog.wsd.sh\/?p=347","title":{"rendered":"05->06 JavaScript \u5909\u66f4"},"content":{"rendered":"<p>1. canvas.js<br \/>\n1.1 globalThis.clickFlg\u306e\u9664\u53bb<br \/>\nmousedown \u3068mouseup\u306e\u30a4\u30d9\u30f3\u30c8\u3092grab\u3057\u305f\u3053\u3068\u3067\u3001globalThis.clickFlg \u306e\u5fc5\u8981\u6027\u3092\u7121\u304f\u3059<br \/>\nbefore:<\/p>\n<pre>\r\n               if(!globalThis.clickFlg) {\r\n                       console.log(\"mousemove\");\r\n                       return false;\r\n               }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n \u7121\u3057\r\n<\/pre>\n<p>1.2<br \/>\nbefore:<\/p>\n<pre>\r\n        canvas.onmousedown = function(){\r\n                globalThis.clickFlg = 1; \/\/ \u30de\u30a6\u30b9\u62bc\u4e0b\u958b\u59cb\r\n                canvas.addEventListener(\"mousemove\" , _mouseMove, false);\r\n        }\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n        canvas.onmousedown = function(e){\r\n                globalThis.clickFlg = 1; \/\/ \u30de\u30a6\u30b9\u62bc\u4e0b\u958b\u59cb\r\n                root.drawStart(e.offsetX, e.offsetY, cnvBold, cnvColor);\r\n                canvas.addEventListener(\"mousemove\" , _mouseMove, false);\r\n        }\r\n<\/pre>\n<p>1.3 draw\u30d5\u30a1\u30f3\u30af\u30b7\u30e7\u30f3\u3092drawStart\u3068draw\u306b\u5206\u96e2<\/p>\n<p>before:<\/p>\n<pre>\r\n        \/\/ \u63cf\u753b\u51e6\u7406\r\n        \"draw\":function (x, y, cnvBold, cnvColor ) {\r\n                this.ctx.lineWidth = cnvBold;\r\n                this.ctx.strokeStyle = 'rgba('+cnvColor+')';\r\n                \/\/ \u521d\u56de\u51e6\u7406\u306e\u5224\u5b9a\r\n                if (globalThis.clickFlg == \"1\") {\r\n                        globalThis.clickFlg = \"2\";\r\n                        this.ctx.beginPath();\r\n                        this.ctx.lineCap = \"round\";  \/\/\u3000\u7dda\u3092\u89d2\u4e38\u306b\u3059\u308b\r\n                        this.ctx.moveTo(x, y);\r\n                } else {\r\n                        this.ctx.lineTo(x, y);\r\n                }\r\n                this.ctx.stroke();\r\n        },\r\n<\/pre>\n<p>after:<\/p>\n<pre>\r\n        \"drawStart\":function (x, y, cnvBold, cnvColor ) {\r\n                this.ctx.lineWidth = cnvBold;\r\n                this.ctx.strokeStyle = 'rgba('+cnvColor+')';\r\n                \/\/ \u521d\u56de\u51e6\u7406\u306e\u5224\u5b9a\r\n                if (globalThis.clickFlg == \"1\") {\r\n                        globalThis.clickFlg = \"2\";\r\n                        this.ctx.beginPath();\r\n                        this.ctx.lineCap = \"round\";  \/\/\u3000\u7dda\u3092\u89d2\u4e38\u306b\u3059\u308b\r\n                        this.ctx.moveTo(x, y);\r\n                        console.log(\"globalThis.clickFlg = \"+globalThis.clickFlg);\r\n                }\r\n        },\r\n\r\n        \/\/ \u63cf\u753b\u51e6\u7406\r\n        \"draw\":function (x, y, cnvBold, cnvColor ) {\r\n                this.ctx.lineWidth = cnvBold;\r\n                this.ctx.strokeStyle = 'rgba('+cnvColor+')';\r\n                \/\/ \u521d\u56de\u51e6\u7406\u306e\u5224\u5b9a\r\n                if (globalThis.clickFlg != \"1\") {\r\n                        this.ctx.lineTo(x, y);\r\n                        console.log(\"globalThis.clickFlg = \"+globalThis.clickFlg);\r\n                }\r\n                this.ctx.stroke();\r\n        },\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1. canvas.js 1.1 globalThis.clickFlg\u306e\u9664\u53bb mousedown \u3068mouseup\u306e\u30a4\u30d9\u30f3\u30c8\u3092grab\u3057\u305f\u3053\u3068\u3067\u3001globalThis.clickFlg \u306e\u5fc5\u8981\u6027\u3092\u7121\u304f\u3059 before:&#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\/347"}],"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=347"}],"version-history":[{"count":1,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/347\/revisions"}],"predecessor-version":[{"id":348,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/347\/revisions\/348"}],"wp:attachment":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}