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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+** of its contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+var windowList = null;
+var indexes = null;
+
+function relayout() {
+ if (windowList === null || windowList.length == 0)
+ return;
+
+ var dim = Math.ceil(Math.sqrt(windowList.length));
+
+ var cols = dim;
+ var rows = Math.ceil(windowList.length / cols);
+
+ var w = root.width / dim;
+ var h = root.height / rows;
+
+ var i;
+ var ix = 0;
+ var iy = 0;
+ var lastDim = 1;
+
+ indexes = new Array(dim * dim);
+
+ for (i = 0; i < windowList.length; ++i) {
+ if (i > 0) {
+ var currentDim = Math.ceil(Math.sqrt(i + 1));
+ if (currentDim == lastDim) {
+ if (iy < currentDim - 1) {
+ ++iy;
+ if (iy == currentDim - 1)
+ ix = 0;
+ } else {
+ ++ix;
+ }
+ } else {
+ iy = 0;
+ ix = currentDim - 1;
+ }
+ lastDim = currentDim;
+ }
+
+ indexes[iy * dim + ix] = i;
+ windowList[i].index = iy * dim + ix;
+
+ var cx = (ix + 0.5) * w;
+ var cy = (iy + 0.5) * h;
+
+ windowList[i].targetScale = 0.98 * Math.min(w / windowList[i].width, h / windowList[i].height);
+
+ windowList[i].targetX = (cx - windowList[i].width / 2);
+ windowList[i].targetY = (cy - windowList[i].height / 2);
+ }
+}
+
+function addWindow(window)
+{
+ if (windowList == null)
+ windowList = new Array(0);
+
+ windowList.push(window);
+ relayout();
+}
+
+function removeWindow(window)
+{
+ var i;
+ for (i = 0; i < windowList.length; ++i) {
+ if (windowList[i] == window)
+ break;
+ }
+
+ var index = windowList[i].index;
+ var dim = Math.ceil(Math.sqrt(windowList.length));
+ var maxY = Math.floor((windowList.length-1) / dim);
+
+ var shrinking = Math.ceil(Math.sqrt(windowList.length - 1)) != dim;
+
+ while (true) {
+ var ix = index % dim;
+ var iy = Math.floor(index / dim);
+
+ if (shrinking) {
+ if (iy > 0)
+ --iy;
+ else if (++ix == dim)
+ break;
+ } else {
+ if (iy < maxY) {
+ if (ix > 0)
+ --ix;
+ else
+ ++iy;
+ } else {
+ ++ix;
+ }
+ }
+
+ var next = iy * dim + ix;
+
+ var currentIndex = indexes[index];
+ var nextIndex = indexes[next];
+
+ if (nextIndex == null)
+ break;
+
+ var temp = windowList[currentIndex];
+ windowList[currentIndex] = windowList[nextIndex];
+ windowList[currentIndex].index = currentIndex;
+ windowList[nextIndex] = temp;
+
+ index = next;
+ }
+
+ windowList.splice(indexes[index], 1);
+ relayout();
+}