Add collectionswitchertreeview widget

src/CMakeLists.txt

@@ -305,7 +305,8 @@ target_sources(kmailprivate PRIVATE
     manageshowcollectionproperties.h
     kmmigrateapplication.h
     historyswitchfolder/historyswitchfoldermanager.h
-
+    historyswitchfolder/collectionswitchertreeview.cpp
+    historyswitchfolder/collectionswitchertreeview.h
     )
 
 qt_add_dbus_adaptor(kmailprivate_LIB_SRCS
@@ -521,6 +522,7 @@ if(BUILD_TESTING)
     add_subdirectory(sieveimapinterface/tests/)
     add_subdirectory(undosend/autotests/)
     add_subdirectory(job/autotests/)
+    add_subdirectory(historyswitchfolder/autotests/)
 endif()
 ########### install files ###############
 install(TARGETS kmailprivate ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} LIBRARY NAMELINK_SKIP)

src/historyswitchfolder/autotests/CMakeLists.txt

+macro(add_kmail_historyswitchfolder_unittest _source)
+    get_filename_component(_name ${_source} NAME_WE)
+    ecm_add_test(${_source}
+        TEST_NAME ${_name}
+        LINK_LIBRARIES kmailprivate Qt::Test Qt::Widgets
+    )
+endmacro ()
+
+
+add_kmail_historyswitchfolder_unittest(collectionswitchertreeviewtest.cpp)

src/historyswitchfolder/autotests/collectionswitchertreeviewtest.cpp

+/*
+  This file is part of KMail, the KDE mail client.
+  SPDX-FileCopyrightText: 2021 Laurent Montel <montel@kde.org>
+
+  SPDX-License-Identifier: GPL-2.0-only
+*/
+#include "collectionswitchertreeviewtest.h"
+#include "historyswitchfolder/collectionswitchertreeview.h"
+#include <QTest>
+
+QTEST_MAIN(CollectionSwitcherTreeViewTest)
+
+CollectionSwitcherTreeViewTest::CollectionSwitcherTreeViewTest(QObject *parent)
+    : QObject{parent}
+{
+}
+
+void CollectionSwitcherTreeViewTest::shouldHaveDefaultValues()
+{
+    CollectionSwitcherTreeView w(nullptr);
+    QVERIFY(!w.rootIsDecorated());
+    QCOMPARE(w.selectionBehavior(), QAbstractItemView::SelectRows);
+    QCOMPARE(w.selectionMode(), QAbstractItemView::SingleSelection);
+    QCOMPARE(w.textElideMode(), Qt::ElideMiddle);
+    QCOMPARE(w.horizontalScrollBarPolicy(), Qt::ScrollBarAlwaysOff);
+    QVERIFY(w.isHeaderHidden());
+    QCOMPARE(w.windowFlags(), Qt::Popup | Qt::FramelessWindowHint);
+}

src/historyswitchfolder/autotests/collectionswitchertreeviewtest.h

+/*
+  This file is part of KMail, the KDE mail client.
+  SPDX-FileCopyrightText: 2021 Laurent Montel <montel@kde.org>
+
+  SPDX-License-Identifier: GPL-2.0-only
+*/
+
+#pragma once
+
+#include <QObject>
+
+class CollectionSwitcherTreeViewTest : public QObject
+{
+    Q_OBJECT
+public:
+    explicit CollectionSwitcherTreeViewTest(QObject *parent = nullptr);
+    ~CollectionSwitcherTreeViewTest() override = default;
+private Q_SLOTS:
+    void shouldHaveDefaultValues();
+};

src/historyswitchfolder/collectionswitchertreeview.cpp

+/*
+  This file is part of KMail, the KDE mail client.
+  SPDX-FileCopyrightText: 2021 Laurent Montel <montel@kde.org>
+
+  SPDX-License-Identifier: GPL-2.0-only
+*/
+
+#include "collectionswitchertreeview.h"
+
+#include <QKeyEvent>
+
+CollectionSwitcherTreeView::CollectionSwitcherTreeView(QWidget *parent)
+    : QTreeView(parent)
+{
+    setWindowFlags(Qt::Popup | Qt::FramelessWindowHint);
+    setSelectionBehavior(QAbstractItemView::SelectRows);
+    setSelectionMode(QAbstractItemView::SingleSelection);
+    setTextElideMode(Qt::ElideMiddle);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+    setHeaderHidden(true);
+    setRootIsDecorated(false);
+}
+
+CollectionSwitcherTreeView::~CollectionSwitcherTreeView()
+{
+}
+
+int CollectionSwitcherTreeView::sizeHintWidth() const
+{
+    return sizeHintForColumn(0) + sizeHintForColumn(1);
+}
+
+void CollectionSwitcherTreeView::resizeColumnsToContents()
+{
+    resizeColumnToContents(0);
+    resizeColumnToContents(1);
+}
+
+void CollectionSwitcherTreeView::keyReleaseEvent(QKeyEvent *event)
+{
+    if (event->key() == Qt::Key_Control) {
+        Q_EMIT collectionSelected(selectionModel()->currentIndex());
+        event->accept();
+        hide();
+    } else {
+        QTreeView::keyReleaseEvent(event);
+    }
+}
+
+void CollectionSwitcherTreeView::keyPressEvent(QKeyEvent *event)
+{
+    if (event->key() == Qt::Key_Escape) {
+        event->accept();
+        hide();
+    } else {
+        QTreeView::keyPressEvent(event);
+    }
+}
+
+void CollectionSwitcherTreeView::showEvent(QShowEvent *event)
+{
+    resizeColumnsToContents();
+    QTreeView::showEvent(event);
+}

src/historyswitchfolder/collectionswitchertreeview.h

+/*
+This file is part of KMail, the KDE mail client.
+SPDX-FileCopyrightText: 2021 Laurent Montel <montel@kde.org>
+
+SPDX-License-Identifier: GPL-2.0-only
+*/
+#pragma once
+
+#include "kmail_private_export.h"
+#include <QTreeView>
+
+class KMAILTESTS_TESTS_EXPORT CollectionSwitcherTreeView : public QTreeView
+{
+    Q_OBJECT
+public:
+    explicit CollectionSwitcherTreeView(QWidget *parent = nullptr);
+    ~CollectionSwitcherTreeView() override;
+
+    Q_REQUIRED_RESULT int sizeHintWidth() const;
+    void resizeColumnsToContents();
+
+Q_SIGNALS:
+    void collectionSelected(const QModelIndex &index);
+
+protected:
+    void keyPressEvent(QKeyEvent *event) override;
+    void showEvent(QShowEvent *event) override;
+    void keyReleaseEvent(QKeyEvent *event) override;
+};