Move project list item delegate to new file

qgis · May 27, 2019 · 1da8eec · 1da8eec
1 parent 4baafa9
commit 1da8eec
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Showing 7 changed files with 263 additions and 198 deletions.
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
@@ -64,6 +64,7 @@ SET(QGIS_APP_SRCS
   qgsmaplayerstylecategoriesmodel.cpp
   qgsmaplayerstyleguiutils.cpp
   qgsmapsavedialog.cpp
+  qgsprojectlistitemdelegate.cpp
   qgspuzzlewidget.cpp
   qgsversionmigration.cpp
   qgsrulebasedlabelingwidget.cpp
@@ -305,6 +306,7 @@ SET (QGIS_APP_MOC_HDRS
   qgsmaplayerstyleguiutils.h
   qgsmapsavedialog.h
   qgspuzzlewidget.h
+  qgsprojectlistitemdelegate.h
   qgsrulebasedlabelingwidget.h
   qgssnappinglayertreemodel.h
   qgssnappingwidget.h

diff --git a/src/app/qgsprojectlistitemdelegate.cpp b/src/app/qgsprojectlistitemdelegate.cpp
@@ -0,0 +1,173 @@
+/***************************************************************************
+
+               ----------------------------------------------------
+              date                 : 22.5.2019
+              copyright            : (C) 2019 by Matthias Kuhn
+              email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "qgsprojectlistitemdelegate.h"
+#include "qgis.h"
+
+#include <QApplication>
+#include <QPainter>
+#include <QTextDocument>
+#include <QAbstractTextDocumentLayout>
+
+QgsProjectListItemDelegate::QgsProjectListItemDelegate( QObject *parent )
+  : QStyledItemDelegate( parent )
+  , mRoundedRectSizePixels( static_cast<int>( Qgis::UI_SCALE_FACTOR * QApplication::fontMetrics().height() * 0.5 ) )
+{
+
+}
+
+void QgsProjectListItemDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const
+{
+  painter->save();
+
+  QTextDocument doc;
+  QPixmap icon = qvariant_cast<QPixmap>( index.data( Qt::DecorationRole ) );
+
+  QAbstractTextDocumentLayout::PaintContext ctx;
+  QStyleOptionViewItem optionV4 = option;
+
+  QColor color = optionV4.palette.color( QPalette::Active, QPalette::Window );
+  if ( option.state & QStyle::State_Selected && option.state & QStyle::State_HasFocus )
+  {
+    color.setAlpha( 40 );
+    ctx.palette.setColor( QPalette::Text, optionV4.palette.color( QPalette::Active, QPalette::HighlightedText ) );
+
+    QStyle *style = QApplication::style();
+    style->drawPrimitive( QStyle::PE_PanelItemViewItem, &option, painter, nullptr );
+  }
+  else if ( option.state & QStyle::State_Enabled )
+  {
+    if ( option.state & QStyle::State_Selected )
+    {
+      color.setAlpha( 40 );
+    }
+    ctx.palette.setColor( QPalette::Text, optionV4.palette.color( QPalette::Active, QPalette::Text ) );
+
+    QStyle *style = QApplication::style();
+    style->drawPrimitive( QStyle::PE_PanelItemViewItem, &option, painter, nullptr );
+  }
+  else
+  {
+    ctx.palette.setColor( QPalette::Text, optionV4.palette.color( QPalette::Disabled, QPalette::Text ) );
+  }
+
+  painter->setRenderHint( QPainter::Antialiasing );
+  painter->setPen( QColor( 0, 0, 0, 0 ) );
+  painter->setBrush( QBrush( color ) );
+  painter->drawRoundedRect( option.rect.left() + 0.625 * mRoundedRectSizePixels, option.rect.top() + 0.625 * mRoundedRectSizePixels,
+                            option.rect.width() - 2 * 0.625 * mRoundedRectSizePixels, option.rect.height() - 2 * 0.625 * mRoundedRectSizePixels, mRoundedRectSizePixels, mRoundedRectSizePixels );
+
+  int titleSize = static_cast<int>( QApplication::fontMetrics().height() * 1.1 );
+  int textSize = static_cast<int>( titleSize * 0.85 );
+
+  doc.setHtml( QStringLiteral( "<div style='font-size:%1px'><span style='font-size:%2px;font-weight:bold;'>%3%4</span><br>%5<br>%6</div>" ).arg( textSize ).arg( QString::number( titleSize ),
+               index.data( QgsProjectListItemDelegate::TitleRole ).toString(),
+               index.data( QgsProjectListItemDelegate::PinRole ).toBool() ? QStringLiteral( "<img src=\"qrc:/images/themes/default/pin.svg\">" ) : QString(),
+               mShowPath ? index.data( QgsProjectListItemDelegate::NativePathRole ).toString() : QString(),
+               index.data( QgsProjectListItemDelegate::CrsRole ).toString() ) );
+  doc.setTextWidth( option.rect.width() - ( !icon.isNull() ? icon.width() + 4.375 * mRoundedRectSizePixels : 4.375 * mRoundedRectSizePixels ) );
+
+  if ( !icon.isNull() )
+  {
+    painter->drawPixmap( option.rect.left() + 1.25 * mRoundedRectSizePixels, option.rect.top() + 1.25 * mRoundedRectSizePixels, icon );
+  }
+
+  painter->translate( option.rect.left() + ( !icon.isNull() ? icon.width() + 3.125 * mRoundedRectSizePixels : 1.875 * mRoundedRectSizePixels ), option.rect.top() + 1.875 * mRoundedRectSizePixels );
+  ctx.clip = QRect( 0, 0, option.rect.width() - ( !icon.isNull() ? icon.width() - 4.375 * mRoundedRectSizePixels : 3.125 *  mRoundedRectSizePixels ), option.rect.height() - 3.125 * mRoundedRectSizePixels );
+  doc.documentLayout()->draw( painter, ctx );
+
+  painter->restore();
+}
+
+QSize QgsProjectListItemDelegate::sizeHint( const QStyleOptionViewItem &option, const QModelIndex &index ) const
+{
+  QTextDocument doc;
+  QPixmap icon = qvariant_cast<QPixmap>( index.data( Qt::DecorationRole ) );
+
+  int width;
+  if ( option.rect.width() < 450 )
+  {
+    width = 450;
+  }
+  else
+  {
+    width = option.rect.width();
+  }
+
+  int titleSize = QApplication::fontMetrics().height() * 1.1;
+  int textSize = titleSize * 0.85;
+
+  doc.setHtml( QStringLiteral( "<div style='font-size:%1px;'><span style='font-size:%2px;font-weight:bold;'>%3%4</span><br>%5<br>%6</div>" ).arg( textSize ).arg( titleSize )
+               .arg( index.data( QgsProjectListItemDelegate::TitleRole ).toString(),
+                     index.data( QgsProjectListItemDelegate::PinRole ).toBool() ? QStringLiteral( "<img src=\"qrc:/images/themes/default/pin.svg\">" ) : QString(),
+                     index.data( QgsProjectListItemDelegate::NativePathRole ).toString(),
+                     index.data( QgsProjectListItemDelegate::CrsRole ).toString() ) );
+  doc.setTextWidth( width - ( !icon.isNull() ? icon.width() + 4.375 * mRoundedRectSizePixels : 4.375 * mRoundedRectSizePixels ) );
+
+  return QSize( width, std::max( ( double ) doc.size().height() + 1.25 * mRoundedRectSizePixels, static_cast<double>( icon.height() ) ) + 2.5 * mRoundedRectSizePixels );
+}
+
+bool QgsProjectListItemDelegate::showPath() const
+{
+  return mShowPath;
+}
+
+void QgsProjectListItemDelegate::setShowPath( bool value )
+{
+  mShowPath = value;
+}
+
+QgsProjectPreviewImage::QgsProjectPreviewImage() = default;
+
+QgsProjectPreviewImage::QgsProjectPreviewImage( const QString &path )
+{
+  loadImageFromFile( path );
+}
+
+QgsProjectPreviewImage::QgsProjectPreviewImage( const QImage &image )
+{
+  mImage = image;
+}
+
+void QgsProjectPreviewImage::loadImageFromFile( const QString &path )
+{
+  mImage = QImage( path );
+}
+
+void QgsProjectPreviewImage::setImage( const QImage &image )
+{
+  mImage = image;
+}
+
+QPixmap QgsProjectPreviewImage::pixmap() const
+{
+  //nicely round corners so users don't get paper cuts
+  QImage previewImage( mImage.size(), QImage::Format_ARGB32 );
+  previewImage.fill( Qt::transparent );
+  QPainter previewPainter( &previewImage );
+  previewPainter.setRenderHint( QPainter::Antialiasing, true );
+  previewPainter.setPen( Qt::NoPen );
+  previewPainter.setBrush( Qt::black );
+  previewPainter.drawRoundedRect( 0, 0, previewImage.width(), previewImage.height(), 8, 8 );
+  previewPainter.setCompositionMode( QPainter::CompositionMode_SourceIn );
+  previewPainter.drawImage( 0, 0, mImage );
+  previewPainter.end();
+  return QPixmap::fromImage( previewImage );
+}
+
+bool QgsProjectPreviewImage::isNull() const
+{
+  return mImage.isNull();
+}
diff --git a/src/app/qgsprojectlistitemdelegate.h b/src/app/qgsprojectlistitemdelegate.h
@@ -0,0 +1,66 @@
+/***************************************************************************
+
+               ----------------------------------------------------
+              date                 : 22.5.2019
+              copyright            : (C) 2019 by Matthias Kuhn
+              email                : matthias@opengis.ch
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef QGSPROJECTLISTITEMDELEGATE_H
+#define QGSPROJECTLISTITEMDELEGATE_H
+
+#include <QStyledItemDelegate>
+
+class QgsProjectPreviewImage
+{
+  public:
+    QgsProjectPreviewImage();
+    QgsProjectPreviewImage( const QString &path );
+    QgsProjectPreviewImage( const QImage &image );
+
+    void loadImageFromFile( const QString &path );
+    void setImage( const QImage &image );
+    QPixmap pixmap() const;
+
+    bool isNull() const;
+
+  private:
+    QImage mImage;
+};
+
+class QgsProjectListItemDelegate : public QStyledItemDelegate
+{
+    Q_OBJECT
+
+  public:
+    enum Role
+    {
+      TitleRole = Qt::UserRole + 1,
+      PathRole = Qt::UserRole + 2,
+      NativePathRole = Qt::UserRole + 3,
+      CrsRole = Qt::UserRole + 4,
+      PinRole = Qt::UserRole + 5
+    };
+
+    explicit QgsProjectListItemDelegate( QObject *parent = nullptr );
+    void paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const override;
+    QSize sizeHint( const QStyleOptionViewItem &option, const QModelIndex &index ) const override;
+
+    bool showPath() const;
+    void setShowPath( bool value );
+
+  private:
+
+    int mRoundedRectSizePixels = 5;
+    bool mShowPath = true;
+    QColor mColor = Qt::white;
+};
+
+#endif // QGSPROJECTLISTITEMDELEGATE_H