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Code Issues Projects Releases Wiki Activity

make scaling more reliable/crosshair

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This commit is contained in:
Val Erastov 2014-12-22 23:19:25 -08:00
parent a88e687da0
commit d6fdf2135f
1 changed files with 32 additions and 5 deletions
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37
web/app/canvas.js
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@ -161,6 +161,13 @@ TCAD.TWO.Viewer.prototype.search = function(x, y, buffer, deep, onlyPoints) {
TCAD.TWO.Viewer.prototype._setupServiceLayer = function() {
var layer = new TCAD.TWO.Layer("_service", TCAD.TWO.Styles.SERVICE);
var ch = new TCAD.TWO.CrossHair(0, 0, 20);
ch.style = {
lineWidth : 1,
strokeStyle : "#fff",
fillStyle : "#fff"
}
layer.objects.push(ch);
layer.objects.push(new TCAD.TWO.Point(0, 0, 2));
this._serviceLayers.push(layer);
@ -552,6 +559,24 @@ TCAD.TWO.Point.prototype.draw = function(ctx, scale) {
TCAD.TWO.utils.drawPoint(ctx, this.x, this.y, this.rad, scale);
};
TCAD.TWO.CrossHair = function(x, y, rad) {
this.x = x;
this.y = y;
this.rad = rad;
this.style = null;
};
TCAD.TWO.CrossHair.prototype.draw = function(ctx, scale) {
ctx.beginPath();
var rad = this.rad / scale;
ctx.moveTo(this.x - rad, this.y);
ctx.lineTo(this.x + rad, this.y);
ctx.moveTo(this.x, this.y - rad);
ctx.lineTo(this.x, this.y + rad);
ctx.closePath();
ctx.stroke();
};
TCAD.TWO.ToolManager = function(viewer, defaultTool) {
this.stack = [defaultTool];
var canvas = viewer.canvas;
@ -672,15 +697,17 @@ TCAD.TWO.PanTool.prototype.mousewheel = function(e) {
var delta = 0;
if ( e.wheelDelta ) { // WebKit / Opera / Explorer 9
delta = e.wheelDelta / 40;
delta = e.wheelDelta;
} else if ( e.detail ) { // Firefox
delta = - e.detail / 3;
delta = - e.detail;
}
var before = this.viewer.screenToModel(e);
this.viewer.scale += delta * 0.01;
var step = 0.05;
delta = delta < 0 ? 1 - step : 1 + step;
this.viewer.scale *= delta;
var after = this.viewer.screenToModel(e);
var dx = after.x - before.x;