[29468] | 1 | /*
|
---|
| 2 | * ext-grid.js
|
---|
| 3 | *
|
---|
| 4 | * Licensed under the Apache License, Version 2
|
---|
| 5 | *
|
---|
| 6 | * Copyright(c) 2010 Redou Mine
|
---|
| 7 | * Copyright(c) 2010 Alexis Deveria
|
---|
| 8 | *
|
---|
| 9 | */
|
---|
| 10 |
|
---|
| 11 | // Dependencies:
|
---|
| 12 | // 1) units.js
|
---|
| 13 | // 2) everything else
|
---|
| 14 |
|
---|
| 15 | methodDraw.addExtension("view_grid", function(s) {
|
---|
| 16 | if (!document.getElementById("canvasGrid")){
|
---|
| 17 | var svgdoc = document.getElementById("svgcanvas").ownerDocument,
|
---|
| 18 | svgns = "http://www.w3.org/2000/svg",
|
---|
| 19 | dims = methodDraw.curConfig.dimensions,
|
---|
| 20 | svgroot = s.svgroot;
|
---|
| 21 | var svgCanvas = methodDraw.canvas;
|
---|
| 22 | var showGrid = false;
|
---|
| 23 | var assignAttributes = s.assignAttributes;
|
---|
| 24 |
|
---|
| 25 | var hcanvas = document.createElement('canvas');
|
---|
| 26 | $(hcanvas).hide().appendTo('body');
|
---|
| 27 |
|
---|
| 28 | var canvasgrid = svgdoc.createElementNS(svgns, "g");
|
---|
| 29 | assignAttributes(canvasgrid, {
|
---|
| 30 | 'id': 'canvasGrid',
|
---|
| 31 | 'width': '100%',
|
---|
| 32 | 'height': '100%',
|
---|
| 33 | 'x': 0,
|
---|
| 34 | 'y': 0,
|
---|
| 35 | 'overflow': 'visible',
|
---|
| 36 | 'display': 'none'
|
---|
| 37 | });
|
---|
| 38 |
|
---|
| 39 | var canvBG = $('#canvas_background');
|
---|
| 40 | canvBG.after(canvasgrid);
|
---|
| 41 |
|
---|
| 42 |
|
---|
| 43 |
|
---|
| 44 | // grid-pattern
|
---|
| 45 | var gridPattern = svgdoc.createElementNS(svgns, "pattern");
|
---|
| 46 | assignAttributes(gridPattern, {
|
---|
| 47 | 'id': 'gridpattern',
|
---|
| 48 | 'patternUnits': 'userSpaceOnUse',
|
---|
| 49 | 'x': 0, //-(value.strokeWidth / 2), // position for strokewidth
|
---|
| 50 | 'y': 0, //-(value.strokeWidth / 2), // position for strokewidth
|
---|
| 51 | 'width': 100,
|
---|
| 52 | 'height': 100
|
---|
| 53 | });
|
---|
| 54 |
|
---|
| 55 | var gridimg = svgdoc.createElementNS(svgns, "image");
|
---|
| 56 | assignAttributes(gridimg, {
|
---|
| 57 | 'x': 0,
|
---|
| 58 | 'y': 0,
|
---|
| 59 | 'width': 100,
|
---|
| 60 | 'height': 100
|
---|
| 61 | });
|
---|
| 62 |
|
---|
| 63 | gridPattern.appendChild(gridimg);
|
---|
| 64 | $('#svgroot defs').append(gridPattern);
|
---|
| 65 |
|
---|
| 66 | // grid-box
|
---|
| 67 | var gridBox = svgdoc.createElementNS(svgns, "rect");
|
---|
| 68 | assignAttributes(gridBox, {
|
---|
| 69 | 'width': '100%',
|
---|
| 70 | 'height': '100%',
|
---|
| 71 | 'x': 0,
|
---|
| 72 | 'y': 0,
|
---|
| 73 | 'stroke-width': 0,
|
---|
| 74 | 'stroke': 'none',
|
---|
| 75 | 'fill': 'url(#gridpattern)',
|
---|
| 76 | 'style': 'pointer-events: none; display:visible;'
|
---|
| 77 | });
|
---|
| 78 | $('#canvasGrid').append(gridBox);
|
---|
| 79 | }
|
---|
| 80 | // });
|
---|
| 81 |
|
---|
| 82 | function updateGrid(zoom) {
|
---|
| 83 | // TODO: Try this with <line> elements, then compare performance difference
|
---|
| 84 |
|
---|
| 85 | var bgwidth = +canvBG.attr('width');
|
---|
| 86 | var bgheight = +canvBG.attr('height');
|
---|
| 87 |
|
---|
| 88 | var units = svgedit.units.getTypeMap();
|
---|
| 89 | var unit = units[methodDraw.curConfig.baseUnit]; // 1 = 1px
|
---|
| 90 | var r_intervals = [.01, .1, 1, 10, 100, 1000];
|
---|
| 91 |
|
---|
| 92 | var d = 0;
|
---|
| 93 | var is_x = (d === 0);
|
---|
| 94 | var dim = is_x ? 'x' : 'y';
|
---|
| 95 | var lentype = is_x?'width':'height';
|
---|
| 96 | var c_elem = svgCanvas.getContentElem();
|
---|
| 97 | var content_d = c_elem.getAttribute(dim)-0;
|
---|
| 98 |
|
---|
| 99 | var hcanv = hcanvas;
|
---|
| 100 |
|
---|
| 101 | var u_multi = unit * zoom;
|
---|
| 102 |
|
---|
| 103 | // Calculate the main number interval
|
---|
| 104 | var raw_m = 100 / u_multi;
|
---|
| 105 | var multi = 1;
|
---|
| 106 | for(var i = 0; i < r_intervals.length; i++) {
|
---|
| 107 | var num = r_intervals[i];
|
---|
| 108 | multi = num;
|
---|
| 109 | if(raw_m <= num) {
|
---|
| 110 | break;
|
---|
| 111 | }
|
---|
| 112 | }
|
---|
| 113 |
|
---|
| 114 | var big_int = multi * u_multi;
|
---|
| 115 |
|
---|
| 116 | // Set the canvas size to the width of the container
|
---|
| 117 | hcanv.width = big_int;
|
---|
| 118 | hcanv.height = big_int;
|
---|
| 119 | var ctx = hcanv.getContext("2d");
|
---|
| 120 |
|
---|
| 121 | var ruler_d = 0;
|
---|
| 122 | var cur_d = .5;
|
---|
| 123 |
|
---|
| 124 | var part = big_int / 10;
|
---|
| 125 |
|
---|
| 126 | ctx.globalAlpha = 0.2;
|
---|
| 127 | ctx.strokeStyle = "#000";
|
---|
| 128 | for(var i = 1; i < 10; i++) {
|
---|
| 129 | var sub_d = Math.round(part * i) + .5;
|
---|
| 130 | // var line_num = (i % 2)?12:10;
|
---|
| 131 | var line_num = 0;
|
---|
| 132 | ctx.moveTo(sub_d, big_int);
|
---|
| 133 | ctx.lineTo(sub_d, line_num);
|
---|
| 134 | ctx.moveTo(big_int, sub_d);
|
---|
| 135 | ctx.lineTo(line_num ,sub_d);
|
---|
| 136 | }
|
---|
| 137 | ctx.stroke();
|
---|
| 138 | ctx.beginPath();
|
---|
| 139 | ctx.globalAlpha = 0.5;
|
---|
| 140 | ctx.moveTo(cur_d, big_int);
|
---|
| 141 | ctx.lineTo(cur_d, 0);
|
---|
| 142 |
|
---|
| 143 | ctx.moveTo(big_int, cur_d);
|
---|
| 144 | ctx.lineTo(0, cur_d);
|
---|
| 145 | ctx.stroke();
|
---|
| 146 |
|
---|
| 147 | var datauri = hcanv.toDataURL('image/png');
|
---|
| 148 | gridimg.setAttribute('width', big_int);
|
---|
| 149 | gridimg.setAttribute('height', big_int);
|
---|
| 150 | gridimg.parentNode.setAttribute('width', big_int);
|
---|
| 151 | gridimg.parentNode.setAttribute('height', big_int);
|
---|
| 152 | svgCanvas.setHref(gridimg, datauri);
|
---|
| 153 | }
|
---|
| 154 |
|
---|
| 155 | return {
|
---|
| 156 | name: "view_grid",
|
---|
| 157 | zoomChanged: function(zoom) {
|
---|
| 158 | // update size
|
---|
| 159 | if(showGrid) updateGrid(zoom);
|
---|
| 160 | },
|
---|
| 161 |
|
---|
| 162 | buttons: [{
|
---|
| 163 | id: "view_grid",
|
---|
| 164 | type: "menu",
|
---|
| 165 | after: "tool_wireframe",
|
---|
| 166 | panel: "view_menu",
|
---|
| 167 | title: "View Grid",
|
---|
| 168 | events: {
|
---|
| 169 | 'click': function() {
|
---|
| 170 | var gr = !$('#view_grid').hasClass('push_button_pressed');
|
---|
| 171 | if (gr) {
|
---|
| 172 | methodDraw.curConfig.showGrid = showGrid = true;
|
---|
| 173 | $('#view_grid').addClass('push_button_pressed');
|
---|
| 174 | $('#canvasGrid').attr('display', 'inline');
|
---|
| 175 | updateGrid(svgCanvas.getZoom());
|
---|
| 176 | }
|
---|
| 177 | else {
|
---|
| 178 | methodDraw.curConfig.showGrid = showGrid = false;
|
---|
| 179 | $('#view_grid').removeClass('push_button_pressed');
|
---|
| 180 | $('#canvasGrid').attr('display', 'none');
|
---|
| 181 | }
|
---|
| 182 | }
|
---|
| 183 | }
|
---|
| 184 | }]
|
---|
| 185 | };
|
---|
| 186 | });
|
---|