From e5a290b1969f22dc1d0f4bfc882e2a4f360290a8 Mon Sep 17 00:00:00 2001 From: Jeff Schiller Date: Mon, 29 Jun 2009 03:58:34 +0000 Subject: [PATCH] Beginnings of code for multi-select. This code is not being used yet, checking in now as a work-in-progress. git-svn-id: http://svg-edit.googlecode.com/svn/trunk@221 eee81c28-f429-11dd-99c0-75d572ba1ddd --- editor/svgcanvas.js | 145 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 142 insertions(+), 3 deletions(-) diff --git a/editor/svgcanvas.js b/editor/svgcanvas.js index 9ee7dead..ed7bd64d 100644 --- a/editor/svgcanvas.js +++ b/editor/svgcanvas.js @@ -89,10 +89,149 @@ function MoveElementCommand(elem, oldNextSibling, oldParent, text) { }; } +// TODO: create a 'typing' command object that tracks changes in text +// if a new Typing command is created and the top command on the stack is also a Typing +// and they both affect the same element, then collapse the two commands into one + +// TODO: create a 'batch' command object that you can add an arbitrary number of +// commands to (this will be useful for making changes to many elements in a +// multiselection at one, we don't want to have to undo each element's change) + +// ************************************************************************************** +// This section holds code that will be used for multi-select, it's basically abstracting +// all of the selector creation/manipulation that is being used in SvgCanvas into its own +// set of classes. NOTE: This code is _NOT_ being used yet. + +// FIXME: what's the right way to make this 'class' private to the SelectorManager? +function Selector(id, elem) { + // this is the selector's unique number + this.id = id; + + // this holds a reference to the element for which this selector is being used + this.selectedElement = elem; + + // this is a flag used internally to track whether the selector is being used or not + this.locked = true; + + // this function is used to reset the id and element that the selector is attached to + this.reset = function(e) { + this.locked = true; + this.selectedElement = e; + }; + + // this holds a reference to the element that holds all visual elements of the selector + this.selectorGroup = addSvgElementFromJson({ "element": "g", + "attr": { + "id": ("selectorGroup"+this.id), + } + }); + + // this holds a reference to element + this.selectorRect = this.selectorGroup.appendChild( addSvgElementFromJson({ + "element": "rect", + "attr": { + "id": ("selectedBox"+this.id), + "fill": "none", + "stroke": "blue", + "stroke-width": "1", + "stroke-dasharray": "5,5", + "width": 1, + "height": 1, + // need to specify this style so that the selectedOutline is not selectable + "style": "pointer-events:none", + } + }) ); + + // this holds a reference to the grip elements for this selector + this.selectorGrips = { "nw":null, + "n":null, + "ne":null, + "w":null, + "e":null, + "sw":null, + "s":null, + "se":null, + }; + + // add the corner grips + for (dir in selectedGrips) { + this.selectorGrips[dir] = this.selectorGroup.appendChild( addSvgElementFromJson({ + "element": "rect", + "attr": { + "id": (dir + "_grip" + this.id), + "fill": "blue", + "width": 6, + "height": 6, + "style": ("cursor:" + dir + "-resize"), + // when we are in rotate mode, we will set rx/ry to 3 +// "rx": 3, +// "ry": 3, + // This expands the mouse-able area of the grips making them + // easier to grab with the mouse. + // This works in Opera and WebKit, but does not work in Firefox + // see https://bugzilla.mozilla.org/show_bug.cgi?id=500174 + "stroke-width": 2, + "pointer-events": "all", + } + }) ); + $('#'+this.selectorGrips[dir].id).mousedown( function() { + current_mode = "resize"; + current_resize_mode = this.id.substr(0,this.id.indexOf("_")); + }); + } + +}; + +function SelectorManager() { + // this will hold the element that contains all selector rects/grips + this.selectorParentGroup = null; + + // this will hold objects of type Selector (see above) + this.selectors = []; + + this.requestSelector = function(elem) { + var N = this.selectors.length; + + // if this is the first time a selector is being requested + // create the group, add it to the DOM and save a reference to it + if (this.selectorParentGroup == null) { + this.selectorParentGroup = addSvgElementFromJson({ + "element": "g", + "attr": { + "id": "selectorParentGroup", + } + }); + } + + for (var i = 0; i < N; ++i) { + if (this.selectors[i] && !this.selectors[i].locked) { + this.selectors[i].locked = true; + this.selectors[i].reset(elem); + return this.selectors[i]; + } + } + // if we reached here, no available selectors were found, we create one + this.selectors[N] = new Selector(N, elem); + this.selectorParentGroup.appendChild(this.selectors[N].selectorGroup); + return this.selectors[N]; + }; + this.releaseSelector = function(sel) { + var N = this.selectors.length; + for (var i = 0; i < N; ++i) { + if (this.selectors[i] && this.selectors[i] == sel) { + if (sel.locked == false) { + console.log("WARNING! selector was released but was not unlocked"); + } + sel.locked = false; + break; + } + } + }; +} +// ************************************************************************************** + function SvgCanvas(c) { - - // private members var canvas = this; var container = c; @@ -407,7 +546,7 @@ function SvgCanvas(c) if (selected != null) { selectedBBox = selected.getBBox(); - // we create this element for the first time here + // we create this element lazily for the first time here if (selectedOutline == null) { // create a group that will hold all the elements that make // up the selected outline