src/panels/folders/paneltreeview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "paneltreeview.h"
  21
  22 #include <KFileItemDelegate>
  23 #include <QListView>
  24 #include <QKeyEvent>
  25 #include <QPainter>
  26 #include <QHeaderView>
  27 #include <QScrollBar>
  28
  29 #include <views/dolphinmodel.h>
  30 #include <views/draganddrophelper.h>
  31
  32 PanelTreeView::PanelTreeView(QWidget* parent) :
  33     KTreeView(parent)
  34 {
  35     setAcceptDrops(true);
  36     setUniformRowHeights(true);
  37     setSelectionMode(QAbstractItemView::SingleSelection);
  38     setEditTriggers(QAbstractItemView::NoEditTriggers);
  39     setSortingEnabled(true);
  40     setFrameStyle(QFrame::NoFrame);
  41     setDragDropMode(QAbstractItemView::DragDrop);
  42     setDropIndicatorShown(false);
  43
  44     setVerticalScrollMode(QListView::ScrollPerPixel);
  45     setHorizontalScrollMode(QListView::ScrollPerPixel);
  46
  47     viewport()->setAttribute(Qt::WA_Hover);
  48
  49     // make the background transparent and apply the window-text color
  50     // to the text color, so that enough contrast is given for all color
  51     // schemes
  52     QPalette p = palette();
  53     p.setColor(QPalette::Active,   QPalette::Text, p.color(QPalette::Active,   QPalette::WindowText));
  54     p.setColor(QPalette::Inactive, QPalette::Text, p.color(QPalette::Inactive, QPalette::WindowText));
  55     p.setColor(QPalette::Disabled, QPalette::Text, p.color(QPalette::Disabled, QPalette::WindowText));
  56     setPalette(p);
  57     viewport()->setAutoFillBackground(false);
  58
  59     KFileItemDelegate* delegate = new KFileItemDelegate(this);
  60     setItemDelegate(delegate);
  61 }
  62
  63 PanelTreeView::~PanelTreeView()
  64 {
  65 }
  66
  67 bool PanelTreeView::event(QEvent* event)
  68 {
  69     switch (event->type()) {
  70     case QEvent::Polish:
  71         // Hide all columns except of the 'Name' column
  72         for (int i = DolphinModel::Name + 1; i < DolphinModel::ExtraColumnCount; ++i) {
  73             hideColumn(i);
  74         }
  75         header()->hide();
  76         break;
  77
  78     case QEvent::Show:
  79         // TODO: The opening/closing animation of subtrees flickers in combination with the
  80         // panel when using the Oxygen style. As workaround the animation is turned off:
  81         setAnimated(false);
  82         break;
  83
  84     case QEvent::UpdateRequest:
  85         // a wheel movement will scroll 1 item
  86         if (model()->rowCount() > 0) {
  87             verticalScrollBar()->setSingleStep(sizeHintForRow(0) / 3);
  88         }
  89         break;
  90
  91     default:
  92         break;
  93     }
  94
  95     return KTreeView::event(event);
  96 }
  97
  98 void PanelTreeView::startDrag(Qt::DropActions supportedActions)
  99 {
 100     DragAndDropHelper::instance().startDrag(this, supportedActions);
 101 }
 102
 103 void PanelTreeView::dragEnterEvent(QDragEnterEvent* event)
 104 {
 105     KTreeView::dragEnterEvent(event);
 106     if (event->mimeData()->hasUrls()) {
 107         event->acceptProposedAction();
 108     }
 109 }
 110
 111 void PanelTreeView::dragLeaveEvent(QDragLeaveEvent* event)
 112 {
 113     KTreeView::dragLeaveEvent(event);
 114     setDirtyRegion(m_dropRect);
 115 }
 116
 117 void PanelTreeView::dragMoveEvent(QDragMoveEvent* event)
 118 {
 119     KTreeView::dragMoveEvent(event);
 120
 121     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 122     const QModelIndex index = indexAt(event->pos());
 123     setDirtyRegion(m_dropRect);
 124     m_dropRect = visualRect(index);
 125     setDirtyRegion(m_dropRect);
 126
 127     if (event->mimeData()->hasUrls()) {
 128         // accept url drops, independently from the destination item
 129         event->acceptProposedAction();
 130     }
 131 }
 132
 133 void PanelTreeView::dropEvent(QDropEvent* event)
 134 {
 135     const QModelIndex index = indexAt(event->pos());
 136     if (index.isValid()) {
 137         emit urlsDropped(index, event);
 138     }
 139     KTreeView::dropEvent(event);
 140 }
 141
 142 #include "paneltreeview.moc"