text: /****************************************************************************
  **
  ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  ** All rights reserved.
  ** Contact: Nokia Corporation (qt-info@nokia.com)
  **
  ** This file is part of the Qt Designer of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** Commercial Usage
  ** Licensees holding valid Qt Commercial licenses may use this file in
  ** accordance with the Qt Commercial License Agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and Nokia.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 2.1 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL included in the
  ** packaging of this file.  Please review the following information to
  ** ensure the GNU Lesser General Public License version 2.1 requirements
  ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** In addition, as a special exception, Nokia gives you certain additional
  ** rights.  These rights are described in the Nokia Qt LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 3.0 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.GPL included in the
  ** packaging of this file.  Please review the following information to
  ** ensure the GNU General Public License version 3.0 requirements will be
  ** met: http://www.gnu.org/copyleft/gpl.html.
  **
  ** If you have questions regarding the use of this file, please contact
  ** Nokia at qt-info@nokia.com.
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  /* It is possible to link the skins as resources into Designer by specifying:
   * QVFB_ROOT=$$QT_SOURCE_TREE/tools/qvfb
   * RESOURCES += $$QVFB_ROOT/ClamshellPhone.qrc  $$QVFB_ROOT/TouchScreenPhone.qrc ...
   * in lib/shared/shared.pri. However, this exceeds a limit of Visual Studio 6. */
  
  #include "previewconfigurationwidget_p.h"
  #include "ui_previewconfigurationwidget.h"
  #include "previewmanager_p.h"
  #include "abstractsettings_p.h"
  #include "shared_settings_p.h"
  
  #include <iconloader_p.h>
  #include <stylesheeteditor_p.h>
  
  #include <deviceskin.h>
  
  #include <QtGui/QFileDialog>
  #include <QtGui/QStyleFactory>
  #include <QtGui/QFileDialog>
  #include <QtGui/QMessageBox>
  #include <QtCore/QPair>
  #include <QtCore/QList>
  #include <QtCore/QDebug>
  #include <QtCore/QFileInfo>
  #include <QtCore/QSharedData>
  
  
  static const char *skinResourcePathC = ":/skins/";
  
  QT_BEGIN_NAMESPACE
  
  static const char *skinExtensionC = "skin";
  
  // Pair of skin name, path
  typedef QPair<QString, QString> SkinNamePath;
  typedef QList<SkinNamePath> Skins;
  enum { SkinComboNoneIndex = 0 };
  
  // find default skins (resources)
  static const Skins &defaultSkins() {
      static Skins rc;
      if (rc.empty()) {
          const QString skinPath = QLatin1String(skinResourcePathC);
          QString pattern = QLatin1String("*.");
          pattern += QLatin1String(skinExtensionC);
          const QDir dir(skinPath, pattern);
          const QFileInfoList list = dir.entryInfoList(QDir::Dirs|QDir::NoDotAndDotDot, QDir::Name);
          if (list.empty())
              return rc;
          const QFileInfoList::const_iterator lcend = list.constEnd();
          for (QFileInfoList::const_iterator it = list.constBegin(); it != lcend; ++it)
              rc.push_back(SkinNamePath(it->baseName(), it->filePath()));
      }
      return rc;
  }
  
  namespace qdesigner_internal {
  
  // ------------- PreviewConfigurationWidgetPrivate
  class PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate {
  public:
      PreviewConfigurationWidgetPrivate(QDesignerFormEditorInterface *core, QGroupBox *g);
  
      void slotEditAppStyleSheet();
      void slotDeleteSkinEntry();
      void slotSkinChanged(int index);
  
      void retrieveSettings();
      void storeSettings() const;
  
      QAbstractButton *appStyleSheetChangeButton() const { return m_ui.m_appStyleSheetChangeButton; }
      QAbstractButton *skinRemoveButton() const { return m_ui.m_skinRemoveButton; }
      QComboBox *skinCombo() const { return m_ui.m_skinCombo; }
  
      QDesignerFormEditorInterface *m_core;
  
  private:
      PreviewConfiguration previewConfiguration() const;
      void setPreviewConfiguration(const PreviewConfiguration &pc);
  
      QStringList userSkins() const;
      void addUserSkins(const QStringList &files);
      bool canRemoveSkin(int index) const;
      int browseSkin();
  
      const QString m_defaultStyle;
      QGroupBox *m_parent;
      Ui::PreviewConfigurationWidget m_ui;
  
      int m_firstUserSkinIndex;
      int m_browseSkinIndex;
      int m_lastSkinIndex; // required in case browse fails
  };
  
  PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::PreviewConfigurationWidgetPrivate(
          QDesignerFormEditorInterface *core, QGroupBox *g) :
      m_core(core),
      m_defaultStyle(PreviewConfigurationWidget::tr("Default")),
      m_parent(g),
      m_firstUserSkinIndex(0),
      m_browseSkinIndex(0),
      m_lastSkinIndex(0)
  {
      m_ui.setupUi(g);
      // styles
      m_ui.m_styleCombo->setEditable(false);
      QStringList styleItems(m_defaultStyle);
      styleItems += QStyleFactory::keys();
      m_ui.m_styleCombo->addItems(styleItems);
  
      // sheet
      m_ui.m_appStyleSheetLineEdit->setTextPropertyValidationMode(qdesigner_internal::ValidationStyleSheet);
      m_ui.m_appStyleSheetClearButton->setIcon(qdesigner_internal::createIconSet(QString::fromUtf8("resetproperty.png")));
      QObject::connect(m_ui.m_appStyleSheetClearButton, SIGNAL(clicked()), m_ui.m_appStyleSheetLineEdit, SLOT(clear()));
  
      m_ui.m_skinRemoveButton->setIcon(qdesigner_internal::createIconSet(QString::fromUtf8("editdelete.png")));
      // skins: find default skins (resources)
      m_ui.m_skinRemoveButton->setEnabled(false);
      Skins skins = defaultSkins();
      skins.push_front(SkinNamePath(PreviewConfigurationWidget::tr("None"), QString()));
  
      const Skins::const_iterator scend = skins.constEnd();
      for (Skins::const_iterator it = skins.constBegin(); it != scend; ++it)
          m_ui.m_skinCombo->addItem (it->first, QVariant(it->second));
      m_browseSkinIndex = m_firstUserSkinIndex = skins.size();
      m_ui.m_skinCombo->addItem(PreviewConfigurationWidget::tr("Browse..."), QString());
  
      m_ui.m_skinCombo->setMaxVisibleItems (qMax(15, 2 * m_browseSkinIndex));
      m_ui.m_skinCombo->setEditable(false);
  
      retrieveSettings();
  }
  
  bool PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::canRemoveSkin(int index) const
  {
      return index >= m_firstUserSkinIndex && index != m_browseSkinIndex;
  }
  
  QStringList PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::userSkins() const
  {
      QStringList rc;
      for (int i = m_firstUserSkinIndex; i < m_browseSkinIndex; i++)
          rc.push_back(m_ui.m_skinCombo->itemData(i).toString());
      return rc;
  }
  
  void PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::addUserSkins(const QStringList &files)
  {
      if (files.empty())
          return;
      const QStringList ::const_iterator fcend = files.constEnd();
      for (QStringList::const_iterator it = files.constBegin(); it != fcend; ++it) {
          const QFileInfo fi(*it);
          if (fi.isDir() && fi.isReadable()) {
              m_ui.m_skinCombo->insertItem(m_browseSkinIndex++, fi.baseName(), QVariant(*it));
          } else {
              qWarning() << "Unable to access the skin directory '" << *it << "'.";
          }
      }
  }
  
  PreviewConfiguration PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::previewConfiguration() const
  {
      PreviewConfiguration  rc;
      QString style = m_ui.m_styleCombo->currentText();
      if (style == m_defaultStyle)
          style.clear();
      const QString applicationStyleSheet = m_ui.m_appStyleSheetLineEdit->text();
      // Figure out skin. 0 is None by definition..
      const int skinIndex = m_ui.m_skinCombo->currentIndex();
      QString deviceSkin;
      if (skinIndex != SkinComboNoneIndex &&  skinIndex != m_browseSkinIndex)
          deviceSkin = m_ui.m_skinCombo->itemData(skinIndex).toString();
  
      return PreviewConfiguration(style, applicationStyleSheet, deviceSkin);
  }
  
  void PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::setPreviewConfiguration(const PreviewConfiguration &pc)
  {
      int styleIndex = m_ui.m_styleCombo->findText(pc.style());
      if (styleIndex == -1)
          styleIndex = m_ui.m_styleCombo->findText(m_defaultStyle);
      m_ui.m_styleCombo->setCurrentIndex(styleIndex);
      m_ui.m_appStyleSheetLineEdit->setText(pc.applicationStyleSheet());
      // find skin by file name. 0 is "none"
      const QString deviceSkin = pc.deviceSkin();
      int skinIndex = deviceSkin.isEmpty() ? 0 : m_ui.m_skinCombo->findData(QVariant(deviceSkin));
      if (skinIndex == -1) {
          qWarning() << "Unable to find skin '" << deviceSkin << "'.";
          skinIndex = 0;
      }
      m_ui.m_skinCombo->setCurrentIndex(skinIndex);
  }
  
  void  PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::slotEditAppStyleSheet()
  {
      StyleSheetEditorDialog dlg(m_core, m_parent, StyleSheetEditorDialog::ModeGlobal);
      dlg.setText(m_ui.m_appStyleSheetLineEdit->text());
      if (dlg.exec() == QDialog::Accepted)
          m_ui.m_appStyleSheetLineEdit->setText(dlg.text());
  }
  
  void  PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::slotDeleteSkinEntry()
  {
      const int index = m_ui.m_skinCombo->currentIndex();
      if (canRemoveSkin(index)) {
          m_ui.m_skinCombo->setCurrentIndex(SkinComboNoneIndex);
          m_ui.m_skinCombo->removeItem(index);
          m_browseSkinIndex--;
      }
  }
  
  void  PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::slotSkinChanged(int index)
  {
      if (index == m_browseSkinIndex) {
          m_ui.m_skinCombo->setCurrentIndex(browseSkin());
      } else {
          m_lastSkinIndex = index;
          m_ui.m_skinRemoveButton->setEnabled(canRemoveSkin(index));
          m_ui.m_skinCombo->setToolTip(index != SkinComboNoneIndex ? m_ui.m_skinCombo->itemData(index).toString() : QString());
      }
  }
  
  void PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::retrieveSettings()
  {
      QDesignerSharedSettings settings(m_core);
      m_parent->setChecked(settings.isCustomPreviewConfigurationEnabled());
      setPreviewConfiguration(settings.customPreviewConfiguration());
      addUserSkins(settings.userDeviceSkins());
  }
  
  void PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::storeSettings() const
  {
      QDesignerSharedSettings settings(m_core);
      settings.setCustomPreviewConfigurationEnabled(m_parent->isChecked());
      settings.setCustomPreviewConfiguration(previewConfiguration());
      settings.setUserDeviceSkins(userSkins());
  }
  
  int  PreviewConfigurationWidget::PreviewConfigurationWidgetPrivate::browseSkin()
  {
      QFileDialog dlg(m_parent);
      dlg.setFileMode(QFileDialog::DirectoryOnly);
      const QString title = tr("Load Custom Device Skin");
      dlg.setWindowTitle(title);
      dlg.setFilter(tr("All QVFB Skins (*.%1)").arg(QLatin1String(skinExtensionC)));
  
      int rc = m_lastSkinIndex;
      do {
          if (!dlg.exec())
              break;
  
          const QStringList directories =  dlg.selectedFiles();
          if (directories.size() != 1)
              break;
  
          // check: 1) name already there
          const QString directory = directories.front();
          const QString name = QFileInfo(directory).baseName();
          const int existingIndex = m_ui.m_skinCombo->findText(name);
          if (existingIndex != -1 && existingIndex != SkinComboNoneIndex &&  existingIndex != m_browseSkinIndex) {
              const QString msgTitle = tr("%1 - Duplicate Skin").arg(title);
              const QString msg = tr("The skin '%1' already exists.").arg(name);
              QMessageBox::information(m_parent, msgTitle, msg);
              break;
          }
          // check: 2) can read
          DeviceSkinParameters parameters;
          QString readError;
          if (parameters.read(directory, DeviceSkinParameters::ReadSizeOnly, &readError)) {
              const QString name = QFileInfo(directory).baseName();
              m_ui.m_skinCombo->insertItem(m_browseSkinIndex, name, QVariant(directory));
              rc = m_browseSkinIndex++;
  
              break;
          } else {
              const QString msgTitle = tr("%1 - Error").arg(title);
              const QString msg = tr("%1 is not a valid skin directory:\n%2").arg(directory).arg(readError);
              QMessageBox::warning (m_parent, msgTitle, msg);
          }
      } while (true);
      return rc;
  }
  
  // ------------- PreviewConfigurationWidget
  PreviewConfigurationWidget::PreviewConfigurationWidget(QDesignerFormEditorInterface *core,
                                                         QWidget *parent) :
      QGroupBox(parent),
      m_impl(new PreviewConfigurationWidgetPrivate(core, this))
  {
      connect(m_impl->appStyleSheetChangeButton(), SIGNAL(clicked()), this, SLOT(slotEditAppStyleSheet()));
      connect(m_impl->skinRemoveButton(), SIGNAL(clicked()), this, SLOT(slotDeleteSkinEntry()));
      connect(m_impl->skinCombo(), SIGNAL(currentIndexChanged(int)), this, SLOT(slotSkinChanged(int)));
  
      m_impl->retrieveSettings();
  }
  
  PreviewConfigurationWidget::~PreviewConfigurationWidget()
  {
      delete m_impl;
  }
  
  void PreviewConfigurationWidget::saveState()
  {
      m_impl->storeSettings();
  }
  
  void PreviewConfigurationWidget::slotEditAppStyleSheet()
  {
      m_impl->slotEditAppStyleSheet();
  }
  
  void PreviewConfigurationWidget::slotDeleteSkinEntry()
  {
      m_impl->slotDeleteSkinEntry();
  }
  
  void PreviewConfigurationWidget::slotSkinChanged(int index)
  {
      m_impl->slotSkinChanged(index);
  }
  
  }
  
  QT_END_NAMESPACE
  