fixtransforms branch: Fix resizing of rotated elements

git-svn-id: http://svg-edit.googlecode.com/svn/branches/fixtransforms@1027 eee81c28-f429-11dd-99c0-75d572ba1ddd
master
Jeff Schiller 2009-12-11 22:42:26 +00:00
parent 0182a59d06
commit 4ca4260fc9
1 changed files with 115 additions and 275 deletions

View File

@ -1400,7 +1400,87 @@ function BatchCommand(text) {
} // for each segment } // for each segment
break; break;
} // switch on element type to get initial values } // switch on element type to get initial values
return changes;
// now we have a set of changes and an applied reduced transform list
// we apply the changes directly to the DOM
// TODO: merge this switch with the above one and optimize
switch (selected.tagName)
{
case "rect":
case "image":
changes.x = changes.x-0 + Math.min(0,changes.width);
changes.y = changes.y-0 + Math.min(0,changes.height);
changes.width = Math.abs(changes.width);
changes.height = Math.abs(changes.height);
assignAttributes(selected, changes, 1000);
break;
case "ellipse":
changes.rx = Math.abs(changes.rx);
changes.ry = Math.abs(changes.ry);
case "circle":
if(changes.r) changes.r = Math.abs(changes.r);
case "line":
case "text":
assignAttributes(selected, changes, 1000);
break;
case "polyline":
case "polygon":
var len = changes["points"].length;
var pstr = "";
for (var i = 0; i < len; ++i) {
var pt = changes["points"][i];
pstr += pt.x + "," + pt.y + " ";
}
selected.setAttribute("points", pstr);
break;
case "path":
var dstr = "";
var len = changes["d"].length;
for (var i = 0; i < len; ++i) {
var seg = changes["d"][i];
var type = seg.type;
dstr += truePathMap[type];
switch(type) {
case 13: // relative horizontal line (h)
case 12: // absolute horizontal line (H)
dstr += seg.x + " ";
break;
case 15: // relative vertical line (v)
case 14: // absolute vertical line (V)
dstr += seg.y + " ";
break;
case 3: // relative move (m)
case 5: // relative line (l)
case 19: // relative smooth quad (t)
case 2: // absolute move (M)
case 4: // absolute line (L)
case 18: // absolute smooth quad (T)
dstr += seg.x + "," + seg.y + " ";
break;
case 7: // relative cubic (c)
case 6: // absolute cubic (C)
dstr += seg.x1 + "," + seg.y1 + " " + seg.x2 + "," + seg.y2 + " " +
seg.x + "," + seg.y + " ";
break;
case 9: // relative quad (q)
case 8: // absolute quad (Q)
dstr += seg.x + "," + seg.y + " " + seg.x1 + "," + seg.y1 + " ";
break;
case 11: // relative elliptical arc (a)
case 10: // absolute elliptical arc (A)
dstr += seg.r1 + "," + seg.r2 + " " + seg.angle + " " + seg.largeArcFlag +
" " + seg.sweepFlag + " " + seg.x + "," + seg.y + " ";
break;
case 17: // relative smooth cubic (s)
case 16: // absolute smooth cubic (S)
dstr += seg.x + "," + seg.y + " " + seg.x2 + "," + seg.y2 + " ";
break;
}
}
selected.setAttribute("d", dstr);
break;
}
}; };
// this function returns the command which resulted from the selected change // this function returns the command which resulted from the selected change
@ -1637,7 +1717,7 @@ function BatchCommand(text) {
} }
var N = tlist.numberOfItems; var N = tlist.numberOfItems;
var bNeedRemap = false; var operation = 0;
// first, if it was a scale then the second-last transform will be it // first, if it was a scale then the second-last transform will be it
// if we had [M][T][S][T] we want to extract the matrix equivalent of // if we had [M][T][S][T] we want to extract the matrix equivalent of
@ -1645,313 +1725,73 @@ function BatchCommand(text) {
if (N >= 3 && tlist.getItem(N-2).type == 3 && if (N >= 3 && tlist.getItem(N-2).type == 3 &&
tlist.getItem(N-3).type == 2 && tlist.getItem(N-1).type == 2) tlist.getItem(N-3).type == 2 && tlist.getItem(N-1).type == 2)
{ {
operation = 3; // scale
m = transformListToTransform(tlist,N-3,N-1).matrix; m = transformListToTransform(tlist,N-3,N-1).matrix;
tlist.removeItem(N-1); tlist.removeItem(N-1);
tlist.removeItem(N-2); tlist.removeItem(N-2);
tlist.removeItem(N-3); tlist.removeItem(N-3);
bNeedRemap = true;
} }
// if we had [T1][M] we want to transform this into [M][T2] // if we had [T1][M] we want to transform this into [M][T2]
// therefore [ T2 ] = [ M_inv ] [ T1 ] [ M ] // therefore [ T2 ] = [ M_inv ] [ T1 ] [ M ]
else if ( (N == 1 || (N > 1 && tlist.getItem(1).type != 3)) && else if ( (N == 1 || (N > 1 && tlist.getItem(1).type != 3)) &&
tlist.getItem(0).type == 2) tlist.getItem(0).type == 2)
{ {
operation = 2; // translate
var oldxlate = tlist.getItem(0).matrix, var oldxlate = tlist.getItem(0).matrix,
meq = transformListToTransform(tlist).matrix, meq = transformListToTransform(tlist).matrix,
meq_inv = meq.inverse(); meq_inv = meq.inverse();
m = matrixMultiply( meq_inv, oldxlate, meq ); m = matrixMultiply( meq_inv, oldxlate, meq );
tlist.removeItem(0); tlist.removeItem(0);
}
bNeedRemap = true; else {
operation = 4; // rotate
} }
// if the shape was rotated, calculate the new center and account for // if the shape was rotated, calculate what the center will be
// the resulting translation in the matrix var xcenter = null;
if (angle) { if (angle) {
// calculate the new center // calculate the new center from the translate
if (operation == 2) {
newcenter = transformPoint(center.x,center.y,m); newcenter = transformPoint(center.x,center.y,m);
}
// if the centers are different, then determine if the resultant xlate else if (operation == 3) {
var alpha = angle * Math.PI / 180.0; xcenter = transformPoint(center.x,center.y,m);
var dx = newcenter.x - center.x,
dy = newcenter.y - center.y;
if (dx != 0 || dy != 0) {
var r = Math.sqrt(dx*dx + dy*dy),
theta = Math.atan2(dy,dx) + alpha;
var cx = r * Math.cos(theta) + center.x,
cy = r * Math.sin(theta) + center.y;
dx = cx - newcenter.x;
dy = cy - newcenter.y;
console.log([center.x,center.y]);
console.log([newcenter.x,newcenter.y]);
console.log([cx,cy]);
console.log([dx,dy]);
// post- or pre- multiply?
var delta = svgroot.createSVGMatrix();
delta.translate(dx,dy);
m = matrixMultiply(delta,m);
} }
} }
if (bNeedRemap) { if (operation == 2 || operation == 3) {
remapElement(selected,changes,m); remapElement(selected,changes,m);
} // if we are remapping } // if we are remapping
// if we had a rotation, re-add the rotation with the newcenter // if we had a rotation, re-add the rotation back with its original center
// (this will change if we had a move or a resize)
if (angle) { if (angle) {
var newRot = svgroot.createSVGTransform(); var newRot = svgroot.createSVGTransform();
newRot.setRotate(angle,newcenter.x,newcenter.y); newRot.setRotate(angle,newcenter.x,newcenter.y);
tlist.insertItemBefore(newRot,0); tlist.insertItemBefore(newRot,0);
} }
/*
while (n--) {
var xform = tlist.getItem(n);
// get the matrix of all transformations to the right of this transform
// and its inverse (B and B_inv)
var tail = transformListToTransform(tlist, n+1, tlist.numberOfItems-1).matrix,
tail_inv = tail.inverse();
// multiply (B_inv * A * B)
m = matrixMultiply(tail_inv, xform.matrix, tail);
var remap = null, scalew = null, scaleh = null; // at this point, the element looks exactly how we want it to look but its
switch (xform.type) { // rotational center may be off in the case of a resize - we need to fix that
case 1: // MATRIX - continue if (angle && operation == 3) {
// newcenter = transformPoint(newcenter.x,newcenter.y,xform.matrix); box = canvas.getBBox(selected);
break; m = transformListToTransform(tlist).matrix;
case 2: // TRANSLATE - always remove
remap = function(x,y) { return transformPoint(x,y,m); };
scalew = function(w) { return w; }
scaleh = function(h) { return h; }
break;
case 3: // SCALE - always remove
remap = function(x,y) { return transformPoint(x,y,m); };
scalew = function(w) { return m.a * w; }
scaleh = function(h) { return m.d * h; }
break;
case 4: // ROTATE
// if the new center of the shape has moved, then
// re-center the rotation, and determine the movement
// offset required to keep the shape in the same place
if (n != 0) continue;
rotAngle = xform.angle;
if (origcenter.x != newcenter.x || origcenter.y != newcenter.y) {
var alpha = xform.angle * Math.PI / 180.0;
// determine where the new rotated center should be // get its actual center
var dx = newcenter.x - origcenter.x, newcenter = transformPoint(box.x+box.width/2, box.y+box.height/2, m);
dy = newcenter.y - origcenter.y,
r = Math.sqrt(dx*dx + dy*dy),
theta = Math.atan2(dy,dx) + alpha;
var cx = r * Math.cos(theta) + origcenter.x,
cy = r * Math.sin(theta) + origcenter.y;
dx = cx - newcenter.x; // determine the resultant delta translate to re-center
dy = cy - newcenter.y; var dx = newcenter.x - xcenter.x,
dy = newcenter.y - xcenter.y;
remap = function(x,y) { var delta = svgroot.createSVGMatrix().translate(dx,dy);
return { x: x + dx, y: y + dy }; remapElement(selected,changes,delta);
};
scalew = function(w) { return w; } var newRot = svgroot.createSVGTransform();
scaleh = function(h) { return h; } newRot.setRotate(angle,newcenter.x,newcenter.y);
tlist.replaceItem(newRot,0);
} }
else {
tlist.removeItem(n);
}
break;
default:
continue;
}
if (!remap) continue;
newcenter = remap(box.x+box.width/2, box.y+box.height/2);
var bpt = remap(box.x,box.y);
box.x = bpt.x;
box.y = bpt.y;
box.width = scalew(box.width);
box.height = scaleh(box.height);
switch (selected.tagName)
{
case "line":
var pt1 = remap(changes["x1"],changes["y1"]),
pt2 = remap(changes["x2"],changes["y2"]);
changes["x1"] = pt1.x;
changes["y1"] = pt1.y;
changes["x2"] = pt2.x;
changes["y2"] = pt2.y;
break;
case "circle":
var c = remap(changes["cx"],changes["cy"]);
changes["cx"] = c.x;
changes["cy"] = c.y;
// take the minimum of the new selected box's dimensions for the new circle radius
changes["r"] = Math.min(box.width/2,box.height/2);
break;
case "ellipse":
var c = remap(changes["cx"],changes["cy"]);
changes["cx"] = c.x;
changes["cy"] = c.y;
changes["rx"] = scalew(changes["rx"]);
changes["ry"] = scaleh(changes["ry"]);
break;
case "rect":
case "image":
var pt1 = remap(changes["x"],changes["y"]);
changes["x"] = pt1.x;
changes["y"] = pt1.y;
changes["width"] = scalew(changes["width"]);
changes["height"] = scaleh(changes["height"]);
break;
case "text":
var pt1 = remap(changes["x"],changes["y"]);
changes["x"] = pt1.x;
changes["y"] = pt1.y;
break;
case "polygon":
case "polyline":
var len = changes["points"].length;
for (var i = 0; i < len; ++i) {
var pt = changes["points"][i];
pt = remap(pt.x,pt.y);
changes["points"][i].x = pt.x;
changes["points"][i].y = pt.y;
}
break;
case "path":
var len = changes["d"].length;
var firstseg = changes["d"][0];
var firstpt = remap(firstseg.x,firstseg.y);
changes["d"][0].x = firstpt.x;
changes["d"][0].y = firstpt.y;
for (var i = 1; i < len; ++i) {
var seg = changes["d"][i];
var type = seg.type;
// if absolute or first segment, we want to remap x, y, x1, y1, x2, y2
// if relative, we want to scalew, scaleh
if (type % 2 == 0) { // absolute
var pt = remap(seg.x,seg.y),
pt1 = remap(seg.x1,seg.y1),
pt2 = remap(seg.x2,seg.y2);
seg.x = pt.x;
seg.y = pt.y;
seg.x1 = pt1.x;
seg.y1 = pt1.y;
seg.x2 = pt2.x;
seg.y2 = pt2.y;
seg.r1 = scalew(seg.r1),
seg.r2 = scaleh(seg.r2);
}
else { // relative
seg.x = scalew(seg.x);
seg.y = scaleh(seg.y);
seg.x1 = scalew(seg.x1);
seg.y1 = scaleh(seg.y1);
seg.x2 = scalew(seg.x2);
seg.y2 = scaleh(seg.y2);
seg.r1 = scalew(seg.r1),
seg.r2 = scaleh(seg.r2);
}
} // for each segment
break;
} // switch on element type to get initial values
// we have eliminated the transform, so remove it
tlist.removeItem(n);
} // looping for each transform
// we may need to insert a rotation back now
if (rotAngle != 0) {
var newrot = svgroot.createSVGTransform();
newrot.setRotate(rotAngle, newcenter.x, newcenter.y);
tlist.insertItemBefore(newrot, 0);
}
*/
} // a non-group } // a non-group
// now we have a set of changes and an applied reduced transform list
// we apply the changes directly to the DOM
switch (selected.tagName)
{
case "rect":
case "image":
changes.x = changes.x-0 + Math.min(0,changes.width);
changes.y = changes.y-0 + Math.min(0,changes.height);
changes.width = Math.abs(changes.width);
changes.height = Math.abs(changes.height);
assignAttributes(selected, changes, 1000);
break;
case "ellipse":
changes.rx = Math.abs(changes.rx);
changes.ry = Math.abs(changes.ry);
case "circle":
if(changes.r) changes.r = Math.abs(changes.r);
case "line":
case "text":
assignAttributes(selected, changes, 1000);
break;
case "polyline":
case "polygon":
var len = changes["points"].length;
var pstr = "";
for (var i = 0; i < len; ++i) {
var pt = changes["points"][i];
pstr += pt.x + "," + pt.y + " ";
}
selected.setAttribute("points", pstr);
break;
case "path":
var dstr = "";
var len = changes["d"].length;
for (var i = 0; i < len; ++i) {
var seg = changes["d"][i];
var type = seg.type;
dstr += truePathMap[type];
switch(type) {
case 13: // relative horizontal line (h)
case 12: // absolute horizontal line (H)
dstr += seg.x + " ";
break;
case 15: // relative vertical line (v)
case 14: // absolute vertical line (V)
dstr += seg.y + " ";
break;
case 3: // relative move (m)
case 5: // relative line (l)
case 19: // relative smooth quad (t)
case 2: // absolute move (M)
case 4: // absolute line (L)
case 18: // absolute smooth quad (T)
dstr += seg.x + "," + seg.y + " ";
break;
case 7: // relative cubic (c)
case 6: // absolute cubic (C)
dstr += seg.x1 + "," + seg.y1 + " " + seg.x2 + "," + seg.y2 + " " +
seg.x + "," + seg.y + " ";
break;
case 9: // relative quad (q)
case 8: // absolute quad (Q)
dstr += seg.x + "," + seg.y + " " + seg.x1 + "," + seg.y1 + " ";
break;
case 11: // relative elliptical arc (a)
case 10: // absolute elliptical arc (A)
dstr += seg.r1 + "," + seg.r2 + " " + seg.angle + " " + seg.largeArcFlag +
" " + seg.sweepFlag + " " + seg.x + "," + seg.y + " ";
break;
case 17: // relative smooth cubic (s)
case 16: // absolute smooth cubic (S)
dstr += seg.x + "," + seg.y + " " + seg.x2 + "," + seg.y2 + " ";
break;
}
}
selected.setAttribute("d", dstr);
break;
}
// if the transform list has been emptied, remove it // if the transform list has been emptied, remove it
if (tlist.numberOfItems == 0) { if (tlist.numberOfItems == 0) {
selected.removeAttribute("transform"); selected.removeAttribute("transform");