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Creating flow layout

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This commit is contained in:
Dan Paulat 2021-11-03 21:35:25 -05:00
parent 9ee52e7a6b
commit cd5d60bc0b
3 changed files with 346 additions and 0 deletions
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6
scwx-qt/scwx-qt.cmake
View file

@ -76,6 +76,8 @@ set(SRC_MAP source/scwx/qt/map/map_widget.cpp
source/scwx/qt/map/triangle_layer.cpp)
set(HDR_SETTINGS source/scwx/qt/settings/general_settings.hpp)
set(SRC_SETTINGS source/scwx/qt/settings/general_settings.cpp)
set(HDR_UI source/scwx/qt/ui/flow_layout.hpp)
set(SRC_UI source/scwx/qt/ui/flow_layout.cpp)
set(HDR_UTIL source/scwx/qt/util/font.hpp
source/scwx/qt/util/font_buffer.hpp
source/scwx/qt/util/json.hpp)
@ -111,6 +113,8 @@ set(PROJECT_SOURCES ${HDR_MAIN}
${SRC_MAP}
${HDR_SETTINGS}
${SRC_SETTINGS}
${HDR_UI}
${SRC_UI}
${HDR_UTIL}
${SRC_UTIL}
${HDR_VIEW}
@ -131,6 +135,8 @@ source_group("Header Files\\map" FILES ${HDR_MAP})
source_group("Source Files\\map" FILES ${SRC_MAP})
source_group("Header Files\\settings" FILES ${HDR_SETTINGS})
source_group("Source Files\\settings" FILES ${SRC_SETTINGS})
source_group("Header Files\\ui" FILES ${HDR_UI})
source_group("Source Files\\ui" FILES ${SRC_UI})
source_group("Header Files\\util" FILES ${HDR_UTIL})
source_group("Source Files\\util" FILES ${SRC_UTIL})
source_group("Header Files\\view" FILES ${HDR_VIEW})

240
scwx-qt/source/scwx/qt/ui/flow_layout.cpp Normal file
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@ -0,0 +1,240 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 <scwx/qt/ui/flow_layout.hpp>
#include <QWidget>
namespace scwx
{
namespace qt
{
namespace ui
{
FlowLayout::FlowLayout(QWidget* parent,
int margin,
int hSpacing,
int vSpacing) :
QLayout(parent), hSpace_(hSpacing), vSpace_(vSpacing)
{
setContentsMargins(margin, margin, margin, margin);
}
FlowLayout::FlowLayout(int margin, int hSpacing, int vSpacing) :
hSpace_(hSpacing), 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 (hSpace_ >= 0)
{
return hSpace_;
}
else
{
return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
}
}
int FlowLayout::verticalSpacing() const
{
if (vSpace_ >= 0)
{
return 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);
}
return nullptr;
}
Qt::Orientations FlowLayout::expandingDirections() const
{
return {};
}
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;
for (const QLayoutItem* item : qAsConst(itemList_))
{
size = size.expandedTo(item->minimumSize());
}
const QMargins margins = contentsMargins();
size +=
QSize(margins.left() + margins.right(), margins.top() + margins.bottom());
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 : qAsConst(itemList_))
{
const QWidget* wid = item->widget();
int spaceX = horizontalSpacing();
if (spaceX == -1)
{
spaceX = wid->style()->layoutSpacing(
QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Horizontal);
}
int spaceY = verticalSpacing();
if (spaceY == -1)
{
spaceY = wid->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());
}
return y + lineHeight - rect.y() + bottom;
}
int FlowLayout::smartSpacing(QStyle::PixelMetric pm) const
{
QObject* parent = this->parent();
if (!parent)
{
return -1;
}
else if (parent->isWidgetType())
{
QWidget* pw = static_cast<QWidget*>(parent);
return pw->style()->pixelMetric(pm, nullptr, pw);
}
else
{
return static_cast<QLayout*>(parent)->spacing();
}
}
} // namespace ui
} // namespace qt
} // namespace scwx

100
scwx-qt/source/scwx/qt/ui/flow_layout.hpp Normal file
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@ -0,0 +1,100 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#pragma once
#include <QLayout>
#include <QStyle>
namespace scwx
{
namespace qt
{
namespace ui
{
/* Adapted from:
* https://doc.qt.io/qt-6/qtwidgets-layouts-flowlayout-example.html
*/
class FlowLayout : public QLayout
{
public:
explicit FlowLayout(QWidget* parent,
int margin = -1,
int hSpacing = -1,
int vSpacing = -1);
explicit FlowLayout(int margin = -1, int hSpacing = -1, int vSpacing = -1);
~FlowLayout();
void addItem(QLayoutItem* item) override;
int horizontalSpacing() const;
int verticalSpacing() const;
Qt::Orientations expandingDirections() const override;
bool hasHeightForWidth() const override;
int heightForWidth(int) const override;
int count() const override;
QLayoutItem* itemAt(int index) const override;
QSize minimumSize() const override;
void setGeometry(const QRect& rect) override;
QSize sizeHint() const override;
QLayoutItem* takeAt(int index) override;
private:
int doLayout(const QRect& rect, bool testOnly) const;
int smartSpacing(QStyle::PixelMetric pm) const;
QList<QLayoutItem*> itemList_;
int hSpace_;
int vSpace_;
};
} // namespace ui
} // namespace qt
} // namespace scwx