ProjectExplorer: Allow applying/cancelling removing and adding devices

Change-Id: I81400c68835a4f7ad48114f57d64260a41781ec3
Reviewed-by: hjk <hjk@qt.io>

src/plugins/projectexplorer/devicesupport/devicesettingspage.cpp

@@ -11,6 +11,8 @@
 #include "idevice.h"
 #include "idevicefactory.h"
 #include "idevicewidget.h"
+
+#include "../kitaspect.h"
 #include "../projectexplorerconstants.h"
 #include "../projectexplorertr.h"
 
@@ -41,6 +43,72 @@ namespace ProjectExplorer::Internal {
 
 const char LastDeviceIndexKey[] = "LastDisplayedMaemoDeviceConfig";
 
+class DeviceProxyModel : public QIdentityProxyModel
+{
+public:
+    QVariant data(const QModelIndex &index, int role) const override
+    {
+        if (role == Qt::FontRole) {
+            const Id id = Id::fromSetting(index.data(KitAspect::IdRole));
+
+            const bool isMarkedForDeletion = m_markedForDeletion.contains(id);
+            const bool isNewDevice = m_newDevices.contains(id);
+
+            QFont font;
+            font.setItalic(isNewDevice);
+            font.setStrikeOut(isMarkedForDeletion);
+            return font;
+        }
+
+        return QIdentityProxyModel::data(index, role);
+    }
+
+    void toggleMarkForDeletion(const Id &id)
+    {
+        if (m_markedForDeletion.contains(id))
+            m_markedForDeletion.remove(id);
+        else
+            m_markedForDeletion.insert(id);
+
+        emitDataChanged(id);
+    }
+
+    void markAsNew(const Id &id)
+    {
+        m_newDevices.insert(id);
+        emitDataChanged(id);
+    }
+
+    void commitNewDevices()
+    {
+        m_newDevices.clear();
+        emit dataChanged(index(0, 0), index(rowCount() - 1, 0), {Qt::FontRole});
+    }
+
+    bool isMarkedForDeletion(const Id &id) const { return m_markedForDeletion.contains(id); }
+    bool isNewDevice(const Id &id) const { return m_newDevices.contains(id); }
+
+    QSet<Id> markedForDeletion() const { return m_markedForDeletion; }
+    QSet<Id> newDevices() const { return m_newDevices; }
+
+private:
+    void emitDataChanged(const Id &id)
+    {
+        for (int i = 0; i < rowCount(); ++i) {
+            const Id deviceId = Id::fromSetting(data(index(i, 0), KitAspect::IdRole));
+            if (deviceId == id) {
+                QModelIndex modelIndex = index(i, 0);
+                emit dataChanged(modelIndex, modelIndex, {Qt::FontRole});
+                break;
+            }
+        }
+    }
+
+private:
+    QSet<Id> m_markedForDeletion;
+    QSet<Id> m_newDevices;
+};
+
 class DeviceSettingsWidget final : public Core::IOptionsPageWidget
 {
 public:
@@ -48,12 +116,12 @@ public:
     ~DeviceSettingsWidget() final { delete m_configWidget; }
 
 private:
-    void apply() final { saveSettings(); }
+    void apply() final;
     void cancel() final;
 
     void saveSettings();
 
-    void handleDeviceUpdated(Utils::Id id);
+    void handleDeviceUpdated(Id id);
     void currentDeviceChanged(int index);
     void addDevice();
     void removeDevice();
@@ -70,7 +138,10 @@ private:
     QString parseTestOutput();
     void updateDeviceFromUi();
 
+    void updateButtons();
+
     DeviceManagerModel * const m_deviceManagerModel;
+    DeviceProxyModel m_deviceProxyModel;
     QList<QPushButton *> m_additionalActionButtons;
     IDeviceWidget *m_configWidget = nullptr;
 
@@ -89,8 +160,22 @@ private:
     QLayout *m_generalFormLayout;
 };
 
+void DeviceSettingsWidget::apply()
+{
+    for (const Id &id : m_deviceProxyModel.markedForDeletion())
+        DeviceManager::instance()->removeDevice(id);
+
+    m_deviceProxyModel.commitNewDevices();
+    updateButtons();
+
+    saveSettings();
+}
+
 void DeviceSettingsWidget::cancel()
 {
+    for (const Id &id : m_deviceProxyModel.newDevices())
+        DeviceManager::instance()->removeDevice(id);
+
     for (int i = 0; i < m_deviceManagerModel->rowCount(); i++)
         m_deviceManagerModel->device(i)->cancel();
     IOptionsPageWidget::cancel();
@@ -99,9 +184,11 @@ void DeviceSettingsWidget::cancel()
 DeviceSettingsWidget::DeviceSettingsWidget()
     : m_deviceManagerModel(new DeviceManagerModel(DeviceManager::instance(), this))
 {
+    m_deviceProxyModel.setSourceModel(m_deviceManagerModel);
+
     m_configurationLabel = new QLabel(Tr::tr("&Device:"));
     m_configurationComboBox = new QComboBox;
-    m_configurationComboBox->setModel(m_deviceManagerModel);
+    m_configurationComboBox->setModel(&m_deviceProxyModel);
     m_generalGroupBox = new QGroupBox(Tr::tr("General"));
     m_osTypeValueLabel = new QLabel;
     m_autoDetectionLabel = new QLabel;
@@ -135,7 +222,8 @@ DeviceSettingsWidget::DeviceSettingsWidget()
             IDevice::Ptr device = factory->construct();
             QTC_ASSERT(device, return);
             DeviceManager::instance()->addDevice(device);
-            m_removeConfigButton->setEnabled(true);
+            m_deviceProxyModel.markAsNew(device->id());
+            updateButtons();
             m_configurationComboBox->setCurrentIndex(m_deviceManagerModel->indexOf(device));
             saveSettings();
         });
@@ -231,7 +319,9 @@ void DeviceSettingsWidget::addDevice()
     Utils::asyncRun([device] { device->checkOsType(); });
 
     DeviceManager::instance()->addDevice(device);
-    m_removeConfigButton->setEnabled(true);
+    m_deviceProxyModel.markAsNew(device->id());
+
+    updateButtons();
     m_configurationComboBox->setCurrentIndex(m_deviceManagerModel->indexOf(device));
     saveSettings();
     if (device->hasDeviceTester())
@@ -240,9 +330,30 @@ void DeviceSettingsWidget::addDevice()
 
 void DeviceSettingsWidget::removeDevice()
 {
-    DeviceManager::instance()->removeDevice(currentDevice()->id());
-    if (DeviceManager::instance()->deviceCount() == 0)
-        currentDeviceChanged(-1);
+    m_deviceProxyModel.toggleMarkForDeletion(currentDevice()->id());
+    updateButtons();
+}
+
+void DeviceSettingsWidget::updateButtons()
+{
+    const IDevice::ConstPtr &current = currentDevice();
+
+    const bool isMarkedForDeletion = m_deviceProxyModel.isMarkedForDeletion(current->id());
+    const bool isNewDevice = m_deviceProxyModel.isNewDevice(current->id());
+
+    m_removeConfigButton->setEnabled(
+        (!current->isAutoDetected() || current->deviceState() == IDevice::DeviceDisconnected)
+        && !isNewDevice);
+
+    if (isMarkedForDeletion)
+        m_removeConfigButton->setText(Tr::tr("&Restore"));
+    else
+        m_removeConfigButton->setText(Tr::tr("&Remove"));
+
+    QFont f = m_configurationComboBox->font();
+    f.setStrikeOut(isMarkedForDeletion);
+    f.setItalic(isNewDevice);
+    m_configurationComboBox->setFont(f);
 }
 
 void DeviceSettingsWidget::displayCurrent()
@@ -260,8 +371,7 @@ void DeviceSettingsWidget::displayCurrent()
         m_deviceStateIconLabel->hide();
     m_deviceStateTextLabel->setText(current->deviceStateToString());
 
-    m_removeConfigButton->setEnabled(!current->isAutoDetected()
-            || current->deviceState() == IDevice::DeviceDisconnected);
+    updateButtons();
 }
 
 void DeviceSettingsWidget::setDeviceInfoWidgetsEnabled(bool enable)
@@ -332,7 +442,7 @@ void DeviceSettingsWidget::currentDeviceChanged(int index)
     const IDevice::ConstPtr device = m_deviceManagerModel->device(index);
     if (!device) {
         setDeviceInfoWidgetsEnabled(false);
-        m_removeConfigButton->setEnabled(false);
+        updateButtons();
         clearDetails();
         m_defaultDeviceButton->setEnabled(false);
         return;
@@ -348,7 +458,7 @@ void DeviceSettingsWidget::currentDeviceChanged(int index)
     m_deviceNameEditWidget = newEdit;
 
     setDeviceInfoWidgetsEnabled(true);
-    m_removeConfigButton->setEnabled(true);
+    updateButtons();
 
     if (device->hasDeviceTester()) {
         QPushButton * const button = new QPushButton(Tr::tr("Test"));