kfile/kdiroperatordetailview.cpp

   1 /*****************************************************************************
   2  * Copyright (C) 2007 by Peter Penz <peter.penz@gmx.at>                      *
   3  *                                                                           *
   4  * This library is free software; you can redistribute it and/or             *
   5  * modify it under the terms of the GNU Library General Public               *
   6  * License version 2 as published by the Free Software Foundation.           *
   7  *                                                                           *
   8  * This library is distributed in the hope that it will be useful,           *
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  11  * Library General Public License for more details.                          *
  12  *                                                                           *
  13  * You should have received a copy of the GNU Library General Public License *
  14  * along with this library; see the file COPYING.LIB.  If not, write to      *
  15  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,      *
  16  * Boston, MA 02110-1301, USA.                                               *
  17  *****************************************************************************/
  18
  19 #include "kdiroperatordetailview_p.h"
  20
  21 #include <kdirlister.h>
  22 #include <kdirmodel.h>
  23 #include <kdebug.h>
  24
  25 #include <QtCore/QEvent>
  26 #include <QtCore/QTimer>
  27 #include <QtGui/QAbstractProxyModel>
  28 #include <QtGui/QApplication>
  29 #include <QtGui/QHeaderView>
  30 #include <QtGui/QListView>
  31 #include <QtGui/QResizeEvent>
  32 #include <QtGui/QScrollBar>
  33
  34 KDirOperatorDetailView::KDirOperatorDetailView(QWidget *parent) :
  35     QTreeView(parent),
  36     m_resizeColumns(true), m_hideDetailColumns(false)
  37 {
  38     setRootIsDecorated(false);
  39     setSortingEnabled(true);
  40     setUniformRowHeights(true);
  41     setDragDropMode(QListView::DragOnly);
  42     setSelectionBehavior(QAbstractItemView::SelectRows);
  43     setEditTriggers(QAbstractItemView::NoEditTriggers);
  44     setVerticalScrollMode(QListView::ScrollPerPixel);
  45     setHorizontalScrollMode(QListView::ScrollPerPixel);
  46 }
  47
  48 KDirOperatorDetailView::~KDirOperatorDetailView()
  49 {
  50 }
  51
  52 void KDirOperatorDetailView::setModel(QAbstractItemModel *model)
  53 {
  54     if (model->rowCount() == 0) {
  55         // The model is empty. Assure that the columns get automatically resized
  56         // until the loading has been finished.
  57         QAbstractProxyModel *proxyModel = static_cast<QAbstractProxyModel*>(model);
  58         KDirModel *dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
  59         connect(dirModel->dirLister(), SIGNAL(completed()),
  60                 this, SLOT(resetResizing()));
  61     } else {
  62         resetResizing();
  63     }
  64
  65     connect(model, SIGNAL(layoutChanged()), this, SLOT(slotLayoutChanged()));
  66
  67     QTreeView::setModel(model);
  68 }
  69
  70 bool KDirOperatorDetailView::setViewMode(KFile::FileView viewMode)
  71 {
  72     bool tree = false;
  73
  74     if (KFile::isDetailView(viewMode)) {
  75         m_hideDetailColumns = false;
  76     } else if (KFile::isTreeView(viewMode)) {
  77         m_hideDetailColumns = true;
  78         tree = true;
  79     } else if (KFile::isDetailTreeView(viewMode)) {
  80         m_hideDetailColumns = false;
  81         tree = true;
  82     } else {
  83         return false;
  84     }
  85
  86     setRootIsDecorated(tree);
  87     setItemsExpandable(tree);
  88
  89     return true;
  90 }
  91
  92 bool KDirOperatorDetailView::event(QEvent *event)
  93 {
  94     if (event->type() == QEvent::Polish) {
  95         QHeaderView *headerView = header();
  96         headerView->setResizeMode(QHeaderView::Interactive);
  97         headerView->setStretchLastSection(true);
  98         headerView->setMovable(false);
  99
 100         setColumnHidden(KDirModel::Size, m_hideDetailColumns);
 101         setColumnHidden(KDirModel::ModifiedTime, m_hideDetailColumns);
 102         hideColumn(KDirModel::Type);
 103         hideColumn(KDirModel::Permissions);
 104         hideColumn(KDirModel::Owner);
 105         hideColumn(KDirModel::Group);
 106     }
 107     else if (event->type() == QEvent::UpdateRequest) {
 108         // A wheel movement will scroll 4 items
 109         if (model()->rowCount())
 110             verticalScrollBar()->setSingleStep((sizeHintForRow(0) / 3) * 4);
 111     }
 112
 113     return QTreeView::event(event);
 114 }
 115
 116 void KDirOperatorDetailView::dragEnterEvent(QDragEnterEvent *event)
 117 {
 118     if (event->mimeData()->hasUrls()) {
 119         event->acceptProposedAction();
 120     }
 121 }
 122
 123 void KDirOperatorDetailView::resizeEvent(QResizeEvent *event)
 124 {
 125     QTreeView::resizeEvent(event);
 126     slotLayoutChanged();
 127 }
 128
 129 void KDirOperatorDetailView::mousePressEvent(QMouseEvent *event)
 130 {
 131     QTreeView::mousePressEvent(event);
 132
 133     const QModelIndex index = indexAt(event->pos());
 134     if (!index.isValid() || (index.column() != KDirModel::Name)) {
 135         const Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
 136         if (!(modifiers & Qt::ShiftModifier) && !(modifiers & Qt::ControlModifier)) {
 137             clearSelection();
 138         }
 139     }
 140 }
 141
 142 void KDirOperatorDetailView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 143 {
 144     QTreeView::currentChanged(current, previous);
 145 }
 146
 147 void KDirOperatorDetailView::resetResizing()
 148 {
 149     QTimer::singleShot(300, this, SLOT(disableColumnResizing()));
 150 }
 151
 152 void KDirOperatorDetailView::disableColumnResizing()
 153 {
 154     m_resizeColumns = false;
 155 }
 156
 157 void KDirOperatorDetailView::slotLayoutChanged()
 158 {
 159     if (m_resizeColumns) {
 160         QHeaderView *headerView = header();
 161         headerView->resizeSections(QHeaderView::ResizeToContents);
 162
 163         // calculate the required width for all columns except the name column
 164         int requiredWidth = 0;
 165         const int count = headerView->count();
 166         for (int i = 1; i < count; ++i) {
 167             requiredWidth += headerView->sectionSize(i);
 168         }
 169
 170         // try to stretch the name column if enough width is available
 171         int oldNameColumnWidth = headerView->sectionSize(KDirModel::Name);
 172         int nameColumnWidth = viewport()->width() - requiredWidth;
 173         if (nameColumnWidth < oldNameColumnWidth) {
 174             nameColumnWidth = oldNameColumnWidth;
 175         }
 176         headerView->resizeSection(KDirModel::Name, nameColumnWidth);
 177     }
 178 }
 179
 180 // kate: space-indent on; indent-width 4; replace-tabs on;