From 29e2acc35974042ef57fb8990033507c9109dbfa Mon Sep 17 00:00:00 2001
From: Alexis Deveria <adeveria@gmail.com>
Date: Mon, 18 Jan 2010 19:14:08 +0000
Subject: [PATCH] Finally fixed last zoom related bug

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@1240 eee81c28-f429-11dd-99c0-75d572ba1ddd
---
 editor/svg-editor.js | 63 +++++---------------------------------------
 editor/svgcanvas.js  | 40 ++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 56 deletions(-)

diff --git a/editor/svg-editor.js b/editor/svg-editor.js
index 10d4f61f..a52ebd69 100644
--- a/editor/svg-editor.js
+++ b/editor/svg-editor.js
@@ -256,6 +256,7 @@ function svg_edit_setup() {
 		if(autoCenter) {
 			updateCanvas();
 		} else {
+			console.log(bb.x, bb.x * zoomlevel);
 			updateCanvas(false, {x: bb.x * zoomlevel + (bb.width * zoomlevel)/2, y: bb.y * zoomlevel + (bb.height * zoomlevel)/2});
 		}
 
@@ -1556,38 +1557,6 @@ function svg_edit_setup() {
 		);
 	}());
 
-	workarea.bind("mousewheel DOMMouseScroll", function(e){
-		if(!e.shiftKey) return;
-		e.preventDefault();
-		var off = $('#svgcanvas').offset();
-		var zoom = svgCanvas.getZoom();
-		var bbox = {
-			'x': (e.pageX - off.left)/zoom,
-			'y': (e.pageY - off.top)/zoom,
-			'width': 0,
-			'height': 0
-		};
-		
-		// Respond to mouse wheel in IE/Webkit/Opera.
-		// (It returns up/dn motion in multiples of 120)
-		if(e.wheelDelta) {
-			if (e.wheelDelta >= 120) {
-				bbox.factor = 2;
-			} else if (e.wheelDelta <= -120) {
-				bbox.factor = .5;
-			}
-		} else if(e.detail) {
-			if (e.detail > 0) {
-				bbox.factor = .5;
-			} else if (e.detail < 0) {
-				bbox.factor = 2;			
-			}				
-		}
-		
-		if(!bbox.factor) return;
-		zoomChanged(window, bbox);
-	});
-
 	// switch modifier key in tooltips if mac
 	// NOTE: This code is not used yet until I can figure out how to successfully bind ctrl/meta
 	// in Opera and Chrome
@@ -2339,6 +2308,7 @@ function svg_edit_setup() {
 		var zoom = svgCanvas.getZoom();
 		var res = svgCanvas.getResolution();
 		var w_area = workarea;
+		var cnvs = $("#svgcanvas");
 		
 		var old_ctr = {
 			x: w_area[0].scrollLeft + w_orig/2,
@@ -2354,11 +2324,11 @@ function svg_edit_setup() {
 			workarea.css('overflow','scroll');
 		}
 		
-		var old_can_y = $("#svgcanvas").height()/2;
-		var old_can_x = $("#svgcanvas").width()/2;
-		$("#svgcanvas").width(w).height(h);
-		var new_can_y = $("#svgcanvas").height()/2;
-		var new_can_x = $("#svgcanvas").width()/2;
+		var old_can_y = cnvs.height()/2;
+		var old_can_x = cnvs.width()/2;
+		cnvs.width(w).height(h);
+		var new_can_y = h/2;
+		var new_can_x = w/2;
 		var offset = svgCanvas.updateCanvas(w, h);
 		
 		var ratio = new_can_x / old_can_x;
@@ -2382,33 +2352,14 @@ function svg_edit_setup() {
 		} else {
 			new_ctr.x += offset.x,
 			new_ctr.y += offset.y;
-// 			new_ctr.x /= zoom;
-// 			new_ctr.y /= zoom;
-// 			console.log('new_ctr',new_ctr)
-// 			
-// 			var old_dist_x = new_ctr.x - old_can_x;
-// 			var new_x = new_can_x + old_dist_x * ratio;
-// 
-// 			var old_dist_y = new_ctr.y - old_can_y;
-// 			var new_y = new_can_y + old_dist_y * ratio;
-// 
-// 			new_ctr = {
-// 				x: new_x, // + res.w/2,
-// 				y: new_y //+ res.h/2,
-// 			};
-
 		}
-// 		console.log('new_ctr',new_ctr)
 		
 		if(center) {
 			w_area[0].scrollLeft = scroll_x;
 			w_area[0].scrollTop = scroll_y;
 		} else {
-
 			w_area[0].scrollLeft = new_ctr.x - w_orig/2;
 			w_area[0].scrollTop = new_ctr.y - h_orig/2;
-
-			// bottom: 
 		}
 	}
 
diff --git a/editor/svgcanvas.js b/editor/svgcanvas.js
index a3b9c3fe..5a058e75 100644
--- a/editor/svgcanvas.js
+++ b/editor/svgcanvas.js
@@ -3174,6 +3174,39 @@ function BatchCommand(text) {
 		$(container).mousedown(mouseDown).mousemove(mouseMove);
 		$(window).mouseup(mouseUp);
 		
+		$(container).bind("mousewheel DOMMouseScroll", function(e){
+			if(!e.shiftKey) return;
+			e.preventDefault();
+
+			root_sctm = svgcontent.getScreenCTM().inverse();
+			var pt = transformPoint( e.pageX, e.pageY, root_sctm );
+			var bbox = {
+				'x': pt.x,
+				'y': pt.y,
+				'width': 0,
+				'height': 0
+			};
+
+			// Respond to mouse wheel in IE/Webkit/Opera.
+			// (It returns up/dn motion in multiples of 120)
+			if(e.wheelDelta) {
+				if (e.wheelDelta >= 120) {
+					bbox.factor = 2;
+				} else if (e.wheelDelta <= -120) {
+					bbox.factor = .5;
+				}
+			} else if(e.detail) {
+				if (e.detail > 0) {
+					bbox.factor = .5;
+				} else if (e.detail < 0) {
+					bbox.factor = 2;			
+				}				
+			}
+			
+			if(!bbox.factor) return;
+			call("zoomed", bbox);
+		});
+		
 	}());
 
 	var pathActions = function() {
@@ -5362,6 +5395,13 @@ function BatchCommand(text) {
 		}
 		return true;
 	};
+	this.getOffset = function() {
+		return {
+			x: svgcontent.getAttribute('x'),
+			y: svgcontent.getAttribute('y')
+		};
+	}
+	
 	this.setBBoxZoom = function(val, editor_w, editor_h) {
 		var spacer = .85;
 		var bb;