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 "dolphinviewcontroller.h"
  23 #include "dolphinmodel.h"
  24 #include "draganddrophelper.h"
  25 #include "viewmodecontroller.h"
  26
  27 #include <kfileitemdelegate.h>
  28 #include <QKeyEvent>
  29 #include <QPainter>
  30 #include <QHeaderView>
  31 #include <QScrollBar>
  32
  33 PanelTreeView::PanelTreeView(QWidget* parent) :
  34     KTreeView(parent)
  35 {
  36     setAcceptDrops(true);
  37     setUniformRowHeights(true);
  38     setSelectionMode(QAbstractItemView::SingleSelection);
  39     setEditTriggers(QAbstractItemView::NoEditTriggers);
  40     setSortingEnabled(true);
  41     setFrameStyle(QFrame::NoFrame);
  42     setDragDropMode(QAbstractItemView::DragDrop);
  43     setDropIndicatorShown(false);
  44
  45     setVerticalScrollMode(QListView::ScrollPerPixel);
  46     setHorizontalScrollMode(QListView::ScrollPerPixel);
  47
  48     viewport()->setAttribute(Qt::WA_Hover);
  49
  50     // make the background transparent and apply the window-text color
  51     // to the text color, so that enough contrast is given for all color
  52     // schemes
  53     QPalette p = palette();
  54     p.setColor(QPalette::Active,   QPalette::Text, p.color(QPalette::Active,   QPalette::WindowText));
  55     p.setColor(QPalette::Inactive, QPalette::Text, p.color(QPalette::Inactive, QPalette::WindowText));
  56     p.setColor(QPalette::Disabled, QPalette::Text, p.color(QPalette::Disabled, QPalette::WindowText));
  57     setPalette(p);
  58     viewport()->setAutoFillBackground(false);
  59
  60     KFileItemDelegate* delegate = new KFileItemDelegate(this);
  61     setItemDelegate(delegate);
  62 }
  63
  64 PanelTreeView::~PanelTreeView()
  65 {
  66 }
  67
  68 bool PanelTreeView::event(QEvent* event)
  69 {
  70     switch (event->type()) {
  71     case QEvent::Polish:
  72         // Hide all columns except of the 'Name' column
  73         for (int i = DolphinModel::Name + 1; i < DolphinModel::ExtraColumnCount; ++i) {
  74             hideColumn(i);
  75         }
  76         header()->hide();
  77         break;
  78
  79     case QEvent::Show:
  80         // TODO: The opening/closing animation of subtrees flickers in combination with the
  81         // panel when using the Oxygen style. As workaround the animation is turned off:
  82         setAnimated(false);
  83         break;
  84
  85     case QEvent::UpdateRequest:
  86         // a wheel movement will scroll 1 item
  87         if (model()->rowCount() > 0) {
  88             verticalScrollBar()->setSingleStep(sizeHintForRow(0) / 3);
  89         }
  90         break;
  91
  92     default:
  93         break;
  94     }
  95
  96     return KTreeView::event(event);
  97 }
  98
  99 void PanelTreeView::startDrag(Qt::DropActions supportedActions)
 100 {
 101     DragAndDropHelper::instance().startDrag(this, supportedActions);
 102 }
 103
 104 void PanelTreeView::dragEnterEvent(QDragEnterEvent* event)
 105 {
 106     KTreeView::dragEnterEvent(event);
 107     if (event->mimeData()->hasUrls()) {
 108         event->acceptProposedAction();
 109     }
 110 }
 111
 112 void PanelTreeView::dragLeaveEvent(QDragLeaveEvent* event)
 113 {
 114     KTreeView::dragLeaveEvent(event);
 115     setDirtyRegion(m_dropRect);
 116 }
 117
 118 void PanelTreeView::dragMoveEvent(QDragMoveEvent* event)
 119 {
 120     KTreeView::dragMoveEvent(event);
 121
 122     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 123     const QModelIndex index = indexAt(event->pos());
 124     setDirtyRegion(m_dropRect);
 125     m_dropRect = visualRect(index);
 126     setDirtyRegion(m_dropRect);
 127
 128     if (event->mimeData()->hasUrls()) {
 129         // accept url drops, independently from the destination item
 130         event->acceptProposedAction();
 131     }
 132 }
 133
 134 void PanelTreeView::dropEvent(QDropEvent* event)
 135 {
 136     const QModelIndex index = indexAt(event->pos());
 137     if (index.isValid()) {
 138         emit urlsDropped(index, event);
 139     }
 140     KTreeView::dropEvent(event);
 141 }
 142
 143 #include "paneltreeview.moc"