X-Git-Url: http://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fwidgets%2Fflowlayout.cpp;fp=pv%2Fwidgets%2Fflowlayout.cpp;h=31ba7fed425e53b74774363480499f85313e06ed;hp=0000000000000000000000000000000000000000;hb=adf9e02242336548a384c23dadc062af7a2ef83a;hpb=ec4f16ff84c688f2572c6e3d2e2184aee95f46f7

diff --git a/pv/widgets/flowlayout.cpp b/pv/widgets/flowlayout.cpp
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+++ b/pv/widgets/flowlayout.cpp
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+/****************************************************************************
+ **
+ ** Copyright (C) 2015 The Qt Company Ltd.
+ ** Contact: http://www.qt.io/licensing/
+ **
+ ** 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 The Qt Company Ltd 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."
+ **
+ ** $QT_END_LICENSE$
+ **
+ ****************************************************************************/
+
+#include <QWidget>
+
+#include "flowlayout.hpp"
+
+FlowLayout::FlowLayout(QWidget *parent, int margin, int hSpacing, int vSpacing) :
+	QLayout(parent),
+	m_parent(parent),
+	m_hSpace(hSpacing),
+	m_vSpace(vSpacing)
+{
+	setContentsMargins(margin, margin, margin, margin);
+}
+
+FlowLayout::FlowLayout(int margin, int hSpacing, int vSpacing) :
+	m_parent(nullptr),
+	m_hSpace(hSpacing),
+	m_vSpace(vSpacing)
+{
+	setContentsMargins(margin, margin, margin, margin);
+}
+
+FlowLayout::~FlowLayout()
+{
+	QLayoutItem *item;
+	while ((item = takeAt(0)))
+		delete item;
+}
+
+void FlowLayout::addItem(QLayoutItem *item)
+{
+	itemList.append(item);
+}
+
+int FlowLayout::horizontalSpacing() const
+{
+	if (m_hSpace >= 0)
+		return m_hSpace;
+	else
+		return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
+}
+
+int FlowLayout::verticalSpacing() const
+{
+	if (m_vSpace >= 0)
+		return m_vSpace;
+	else
+		return smartSpacing(QStyle::PM_LayoutVerticalSpacing);
+}
+
+int FlowLayout::count() const
+{
+	return itemList.size();
+}
+
+QLayoutItem *FlowLayout::itemAt(int index) const
+{
+	return itemList.value(index);
+}
+
+QLayoutItem *FlowLayout::takeAt(int index)
+{
+	if ((index >= 0) && (index < itemList.size()))
+		return itemList.takeAt(index);
+	else
+		return 0;
+}
+
+Qt::Orientations FlowLayout::expandingDirections() const
+{
+	return Qt::Horizontal | Qt::Vertical;
+}
+
+bool FlowLayout::hasHeightForWidth() const
+{
+	return true;
+}
+
+int FlowLayout::heightForWidth(int width) const
+{
+	int height = doLayout(QRect(0, 0, width, 0), true);
+	return height;
+}
+
+void FlowLayout::setGeometry(const QRect &rect)
+{
+	QLayout::setGeometry(rect);
+	doLayout(rect, false);
+}
+
+QSize FlowLayout::sizeHint() const
+{
+	return minimumSize();
+}
+
+QSize FlowLayout::minimumSize() const
+{
+	QSize size(0, 0);
+
+	for (QLayoutItem* item : itemList) {
+		int w = item->geometry().x() + item->geometry().width();
+		if (w > size.width())
+			size.setWidth(w);
+
+		int h = item->geometry().y() + item->geometry().width();
+		if (h > size.height())
+			size.setHeight(h);
+	}
+
+	size += QSize(2 * margin(), 2 * margin());
+
+	return size;
+}
+
+int FlowLayout::doLayout(const QRect &rect, bool testOnly) const
+{
+	int left, top, right, bottom;
+	getContentsMargins(&left, &top, &right, &bottom);
+
+	QRect effectiveRect = rect.adjusted(left, top, -right, -bottom);
+	int x = effectiveRect.x();
+	int y = effectiveRect.y();
+
+	int lineHeight = 0;
+	for (QLayoutItem* item : itemList) {
+		QWidget* w = item->widget();
+
+		int spaceX = horizontalSpacing();
+		if (spaceX == -1)
+			spaceX = w->style()->layoutSpacing(
+				QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Horizontal);
+
+		int spaceY = verticalSpacing();
+		if (spaceY == -1)
+			spaceY = w->style()->layoutSpacing(
+				QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Vertical);
+
+		int nextX = x + item->sizeHint().width() + spaceX;
+		if (((nextX - spaceX) > effectiveRect.right()) && (lineHeight > 0)) {
+			x = effectiveRect.x();
+			y = y + lineHeight + spaceY;
+			nextX = x + item->sizeHint().width() + spaceX;
+			lineHeight = 0;
+		}
+
+		if (!testOnly)
+			item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
+
+		x = nextX;
+		lineHeight = qMax(lineHeight, item->sizeHint().height());
+	}
+
+	int height = y + lineHeight - rect.y() + bottom;
+
+	if (m_parent)
+		m_parent->setMinimumHeight(height);
+
+	return height;
+}
+
+int FlowLayout::smartSpacing(QStyle::PixelMetric pm) const
+{
+	QObject *parent = this->parent();
+
+	if (!parent)
+		return -1;
+
+	if (parent->isWidgetType()) {
+		QWidget *pw = qobject_cast<QWidget*>(parent);
+		return pw->style()->pixelMetric(pm, 0, pw);
+	} else
+		return static_cast<QLayout*>(parent)->spacing();
+}