Meson: Flatten directory hierarchy

Keep tests/ and icons/ but put the rest into the toplevel.

The previous setup was so different from the rest of the bunch that
it regularly stuck out in maintenance tasks.

Change-Id: I69821be6268f69682353a388f6bb1fa343215303
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/mesonprojectmanager/toolitemsettings.cpp

@@ -0,0 +1,59 @@
+// Copyright (C) 2020 Alexis Jeandet.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
+
+#include "toolitemsettings.h"
+
+#include "tooltreeitem.h"
+
+#include <utils/layoutbuilder.h>
+#include <utils/pathchooser.h>
+
+#include <QLineEdit>
+
+using namespace Utils;
+
+namespace MesonProjectManager::Internal {
+
+ToolItemSettings::ToolItemSettings(QWidget *parent)
+    : QWidget(parent)
+{
+    m_mesonNameLineEdit = new QLineEdit;
+
+    m_mesonPathChooser = new PathChooser;
+    m_mesonPathChooser->setExpectedKind(PathChooser::ExistingCommand);
+    m_mesonPathChooser->setHistoryCompleter(QLatin1String("Meson.Command.History"));
+
+    using namespace Layouting;
+
+    Form {
+        tr("Name:"), m_mesonNameLineEdit, br,
+        tr("Path:"), m_mesonPathChooser, br,
+    }.attachTo(this, WithoutMargins);
+
+    connect(m_mesonPathChooser, &PathChooser::rawPathChanged, this, &ToolItemSettings::store);
+    connect(m_mesonNameLineEdit, &QLineEdit::textChanged, this, &ToolItemSettings::store);
+}
+
+void ToolItemSettings::load(ToolTreeItem *item)
+{
+    if (item) {
+        m_currentId = std::nullopt;
+        m_mesonNameLineEdit->setDisabled(item->isAutoDetected());
+        m_mesonNameLineEdit->setText(item->name());
+        m_mesonPathChooser->setDisabled(item->isAutoDetected());
+        m_mesonPathChooser->setFilePath(item->executable());
+        m_currentId = item->id();
+    } else {
+        m_currentId = std::nullopt;
+    }
+}
+
+void ToolItemSettings::store()
+{
+    if (m_currentId)
+        emit applyChanges(*m_currentId,
+                          m_mesonNameLineEdit->text(),
+                          m_mesonPathChooser->filePath());
+}
+
+} // MesonProjectManager::Internal