qt 6.5.1 original

examples/widgets/layouts/borderlayout/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(borderlayout LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/widgets/layouts/borderlayout")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(borderlayout
+    borderlayout.cpp borderlayout.h
+    main.cpp
+    window.cpp window.h
+)
+
+set_target_properties(borderlayout PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(borderlayout PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)
+
+install(TARGETS borderlayout
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/widgets/layouts/borderlayout/borderlayout.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "borderlayout.h"
+
+BorderLayout::BorderLayout(QWidget *parent, const QMargins &margins, int spacing)
+    : QLayout(parent)
+{
+    setContentsMargins(margins);
+    setSpacing(spacing);
+}
+
+BorderLayout::BorderLayout(int spacing)
+{
+    setSpacing(spacing);
+}
+
+
+BorderLayout::~BorderLayout()
+{
+    QLayoutItem *l;
+    while ((l = takeAt(0)))
+        delete l;
+}
+
+void BorderLayout::addItem(QLayoutItem *item)
+{
+    add(item, West);
+}
+
+void BorderLayout::addWidget(QWidget *widget, Position position)
+{
+    add(new QWidgetItem(widget), position);
+}
+
+Qt::Orientations BorderLayout::expandingDirections() const
+{
+    return Qt::Horizontal | Qt::Vertical;
+}
+
+bool BorderLayout::hasHeightForWidth() const
+{
+    return false;
+}
+
+int BorderLayout::count() const
+{
+    return list.size();
+}
+
+QLayoutItem *BorderLayout::itemAt(int index) const
+{
+    ItemWrapper *wrapper = list.value(index);
+    return wrapper ? wrapper->item : nullptr;
+}
+
+QSize BorderLayout::minimumSize() const
+{
+    return calculateSize(MinimumSize);
+}
+
+void BorderLayout::setGeometry(const QRect &rect)
+{
+    ItemWrapper *center = nullptr;
+    int eastWidth = 0;
+    int westWidth = 0;
+    int northHeight = 0;
+    int southHeight = 0;
+    int centerHeight = 0;
+    int i;
+
+    QLayout::setGeometry(rect);
+
+    for (i = 0; i < list.size(); ++i) {
+        ItemWrapper *wrapper = list.at(i);
+        QLayoutItem *item = wrapper->item;
+        Position position = wrapper->position;
+
+        if (position == North) {
+            item->setGeometry(QRect(rect.x(), northHeight, rect.width(),
+                                    item->sizeHint().height()));
+
+            northHeight += item->geometry().height() + spacing();
+        } else if (position == South) {
+            item->setGeometry(QRect(item->geometry().x(),
+                                    item->geometry().y(), rect.width(),
+                                    item->sizeHint().height()));
+
+            southHeight += item->geometry().height() + spacing();
+
+            item->setGeometry(QRect(rect.x(),
+                              rect.y() + rect.height() - southHeight + spacing(),
+                              item->geometry().width(),
+                              item->geometry().height()));
+        } else if (position == Center) {
+            center = wrapper;
+        }
+    }
+
+    centerHeight = rect.height() - northHeight - southHeight;
+
+    for (i = 0; i < list.size(); ++i) {
+        ItemWrapper *wrapper = list.at(i);
+        QLayoutItem *item = wrapper->item;
+        Position position = wrapper->position;
+
+        if (position == West) {
+            item->setGeometry(QRect(rect.x() + westWidth, northHeight,
+                                    item->sizeHint().width(), centerHeight));
+
+            westWidth += item->geometry().width() + spacing();
+        } else if (position == East) {
+            item->setGeometry(QRect(item->geometry().x(), item->geometry().y(),
+                                    item->sizeHint().width(), centerHeight));
+
+            eastWidth += item->geometry().width() + spacing();
+
+            item->setGeometry(QRect(
+                              rect.x() + rect.width() - eastWidth + spacing(),
+                              northHeight, item->geometry().width(),
+                              item->geometry().height()));
+        }
+    }
+
+    if (center)
+        center->item->setGeometry(QRect(westWidth, northHeight,
+                                        rect.width() - eastWidth - westWidth,
+                                        centerHeight));
+}
+
+QSize BorderLayout::sizeHint() const
+{
+    return calculateSize(SizeHint);
+}
+
+QLayoutItem *BorderLayout::takeAt(int index)
+{
+    if (index >= 0 && index < list.size()) {
+        ItemWrapper *layoutStruct = list.takeAt(index);
+        return layoutStruct->item;
+    }
+    return nullptr;
+}
+
+void BorderLayout::add(QLayoutItem *item, Position position)
+{
+    list.append(new ItemWrapper(item, position));
+}
+
+QSize BorderLayout::calculateSize(SizeType sizeType) const
+{
+    QSize totalSize;
+
+    for (int i = 0; i < list.size(); ++i) {
+        ItemWrapper *wrapper = list.at(i);
+        Position position = wrapper->position;
+        QSize itemSize;
+
+        if (sizeType == MinimumSize)
+            itemSize = wrapper->item->minimumSize();
+        else // (sizeType == SizeHint)
+            itemSize = wrapper->item->sizeHint();
+
+        if (position == North || position == South || position == Center)
+            totalSize.rheight() += itemSize.height();
+
+        if (position == West || position == East || position == Center)
+            totalSize.rwidth() += itemSize.width();
+    }
+    return totalSize;
+}

examples/widgets/layouts/borderlayout/borderlayout.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef BORDERLAYOUT_H
+#define BORDERLAYOUT_H
+
+#include <QLayout>
+#include <QRect>
+
+class BorderLayout : public QLayout
+{
+public:
+    enum Position { West, North, South, East, Center };
+
+    explicit BorderLayout(QWidget *parent, const QMargins &margins = QMargins(), int spacing = -1);
+    BorderLayout(int spacing = -1);
+    ~BorderLayout();
+
+    void addItem(QLayoutItem *item) override;
+    void addWidget(QWidget *widget, Position position);
+    Qt::Orientations expandingDirections() const override;
+    bool hasHeightForWidth() 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;
+
+    void add(QLayoutItem *item, Position position);
+
+private:
+    struct ItemWrapper
+    {
+        ItemWrapper(QLayoutItem *i, Position p) {
+            item = i;
+            position = p;
+        }
+
+        QLayoutItem *item;
+        Position position;
+    };
+
+    enum SizeType { MinimumSize, SizeHint };
+    QSize calculateSize(SizeType sizeType) const;
+
+    QList<ItemWrapper *> list;
+};
+
+#endif // BORDERLAYOUT_H

examples/widgets/layouts/borderlayout/borderlayout.pro

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+QT += widgets
+
+HEADERS     = borderlayout.h \
+              window.h
+SOURCES     = borderlayout.cpp \
+              main.cpp \
+              window.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/layouts/borderlayout
+INSTALLS += target

examples/widgets/layouts/borderlayout/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QApplication>
+
+#include "window.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Window window;
+    window.show();
+    return app.exec();
+}

examples/widgets/layouts/borderlayout/window.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "borderlayout.h"
+#include "window.h"
+#include <QTextBrowser>
+#include <QLabel>
+
+Window::Window()
+{
+    QTextBrowser *centralWidget = new QTextBrowser;
+    centralWidget->setPlainText(tr("Central widget"));
+
+    BorderLayout *layout = new BorderLayout;
+    layout->addWidget(centralWidget, BorderLayout::Center);
+    layout->addWidget(createLabel("North"), BorderLayout::North);
+    layout->addWidget(createLabel("West"), BorderLayout::West);
+    layout->addWidget(createLabel("East 1"), BorderLayout::East);
+    layout->addWidget(createLabel("East 2") , BorderLayout::East);
+    layout->addWidget(createLabel("South"), BorderLayout::South);
+    setLayout(layout);
+
+    setWindowTitle(tr("Border Layout"));
+}
+
+QLabel *Window::createLabel(const QString &text)
+{
+    QLabel *label = new QLabel(text);
+    label->setFrameStyle(QFrame::Box | QFrame::Raised);
+    return label;
+}

examples/widgets/layouts/borderlayout/window.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+QT_END_NAMESPACE
+
+class Window : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Window();
+
+private:
+    QLabel *createLabel(const QString &text);
+};
+
+#endif // WINDOW_H