src/urlnavigatorbutton.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
   3  *   Copyright (C) 2006 by Aaron J. Seigo (<aseigo@kde.org>)               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "urlnavigatorbutton.h"
  22 #include <qcursor.h>
  23 #include <qfontmetrics.h>
  24 #include <qpainter.h>
  25 #include <qtimer.h>
  26 #include <qtooltip.h>
  27 //Added by qt3to4:
  28 #include <QDropEvent>
  29 #include <QDragLeaveEvent>
  30 #include <Q3PopupMenu>
  31 #include <QEvent>
  32 #include <QDragEnterEvent>
  33
  34 #include <kglobalsettings.h>
  35 #include <kiconloader.h>
  36 #include <kio/jobclasses.h>
  37 #include <klocale.h>
  38 #include <kurl.h>
  39 #include <assert.h>
  40
  41 #include "urlnavigator.h"
  42 #include "dolphinview.h"
  43 #include "dolphin.h"
  44
  45 UrlNavigatorButton::UrlNavigatorButton(int index, UrlNavigator* parent) :
  46     UrlButton(parent),
  47     m_index(-1),
  48     m_listJob(0)
  49 {
  50     setAcceptDrops(true);
  51     setMinimumWidth(arrowWidth());
  52     setIndex(index);
  53     connect(this, SIGNAL(clicked()), this, SLOT(updateNavigatorUrl()));
  54
  55     m_popupDelay = new QTimer(this);
  56     connect(m_popupDelay, SIGNAL(timeout()), this, SLOT(startListJob()));
  57     connect(this, SIGNAL(pressed()), this, SLOT(startPopupDelay()));
  58 }
  59
  60 UrlNavigatorButton::~UrlNavigatorButton()
  61 {
  62 }
  63
  64 void UrlNavigatorButton::setIndex(int index)
  65 {
  66     m_index = index;
  67
  68     if (m_index < 0) {
  69         return;
  70     }
  71
  72     QString path(urlNavigator()->url().pathOrUrl());
  73     setText(path.section('/', index, index));
  74
  75     // Check whether the button indicates the full path of the Url. If
  76     // this is the case, the button is marked as 'active'.
  77     ++index;
  78     QFont adjustedFont(font());
  79     if (path.section('/', index, index).isEmpty()) {
  80         setDisplayHintEnabled(ActivatedHint, true);
  81         adjustedFont.setBold(true);
  82     }
  83     else {
  84         setDisplayHintEnabled(ActivatedHint, false);
  85         adjustedFont.setBold(false);
  86     }
  87
  88     setFont(adjustedFont);
  89     update();
  90 }
  91
  92 QSize UrlNavigatorButton::sizeHint() const
  93 {
  94     const int width = fontMetrics().width(text()) + (arrowWidth() * 4);
  95     return QSize(width, UrlButton::sizeHint().height());
  96 }
  97
  98 void UrlNavigatorButton::paintEvent(QPaintEvent* event)
  99 {
 100     QPainter painter(this);
 101     const int buttonWidth  = width();
 102     const int buttonHeight = height();
 103
 104     QColor backgroundColor;
 105     QColor foregroundColor;
 106     const bool isHighlighted = isDisplayHintEnabled(EnteredHint) ||
 107                                isDisplayHintEnabled(DraggedHint) ||
 108                                isDisplayHintEnabled(PopupActiveHint);
 109     if (isHighlighted) {
 110         backgroundColor = KGlobalSettings::highlightColor();
 111         foregroundColor = KGlobalSettings::highlightedTextColor();
 112     }
 113     else {
 114         backgroundColor = colorGroup().background();
 115         foregroundColor = KGlobalSettings::buttonTextColor();
 116     }
 117
 118     // dimm the colors if the parent view does not have the focus
 119     const DolphinView* parentView = urlNavigator()->dolphinView();
 120     const Dolphin& dolphin = Dolphin::mainWin();
 121
 122     const bool isActive = (dolphin.activeView() == parentView);
 123     if (!isActive) {
 124         QColor dimmColor(colorGroup().background());
 125         foregroundColor = mixColors(foregroundColor, dimmColor);
 126         if (isHighlighted) {
 127             backgroundColor = mixColors(backgroundColor, dimmColor);
 128         }
 129     }
 130
 131     // draw button background
 132     painter.setPen(Qt::NoPen);
 133     painter.setBrush(backgroundColor);
 134     painter.drawRect(0, 0, buttonWidth, buttonHeight);
 135
 136     int textWidth = buttonWidth;
 137     if (isDisplayHintEnabled(ActivatedHint) && isActive || isHighlighted) {
 138         painter.setPen(foregroundColor);
 139     }
 140     else {
 141         // dimm the foreground color by mixing it with the background
 142         foregroundColor = mixColors(foregroundColor, backgroundColor);
 143         painter.setPen(foregroundColor);
 144     }
 145
 146     if (!isDisplayHintEnabled(ActivatedHint)) {
 147         // draw arrow
 148         const int border = 2;  // horizontal border
 149         const int middleY = height() / 2;
 150         const int width = arrowWidth();
 151         const int startX = (buttonWidth - width) - (2 * border);
 152         const int startTopY = middleY - (width - 1);
 153         const int startBottomY = middleY + (width - 1);
 154         for (int i = 0; i < width; ++i) {
 155             painter.drawLine(startX, startTopY + i, startX + i, startTopY + i);
 156             painter.drawLine(startX, startBottomY - i, startX + i, startBottomY - i);
 157         }
 158
 159         textWidth = startX - border;
 160     }
 161
 162     const bool clipped = isTextClipped();
 163     const int align = clipped ? Qt::AlignVCenter : Qt::AlignCenter;
 164     painter.drawText(QRect(0, 0, textWidth, buttonHeight), align, text());
 165
 166     if (clipped) {
 167         // Blend the right area of the text with the background, as the
 168         // text is clipped.
 169         // TODO: use alpha blending in Qt4 instead of drawing the text that often
 170         const int blendSteps = 16;
 171
 172         QColor blendColor(backgroundColor);
 173         const int redInc   = (foregroundColor.red()   - backgroundColor.red())   / blendSteps;
 174         const int greenInc = (foregroundColor.green() - backgroundColor.green()) / blendSteps;
 175         const int blueInc  = (foregroundColor.blue()  - backgroundColor.blue())  / blendSteps;
 176         for (int i = 0; i < blendSteps; ++i) {
 177             painter.setClipRect(QRect(textWidth - i, 0, 1, buttonHeight));
 178             painter.setPen(blendColor);
 179             painter.drawText(QRect(0, 0, textWidth, buttonHeight), align, text());
 180
 181             blendColor.setRgb(blendColor.red()   + redInc,
 182                               blendColor.green() + greenInc,
 183                               blendColor.blue()  + blueInc);
 184         }
 185     }
 186 }
 187
 188 void UrlNavigatorButton::enterEvent(QEvent* event)
 189 {
 190     UrlButton::enterEvent(event);
 191
 192     // if the text is clipped due to a small window width, the text should
 193     // be shown as tooltip
 194     if (isTextClipped()) {
 195         QToolTip::add(this, text());
 196     }
 197 }
 198
 199 void UrlNavigatorButton::leaveEvent(QEvent* event)
 200 {
 201     UrlButton::leaveEvent(event);
 202     QToolTip::remove(this);
 203 }
 204
 205 void UrlNavigatorButton::dropEvent(QDropEvent* event)
 206 {
 207     if (m_index < 0) {
 208         return;
 209     }
 210
 211     KUrl::List urls;
 212     /* KDE4-TODO:
 213     if (KUrlDrag::decode(event, urls) && !urls.isEmpty()) {
 214         setDisplayHintEnabled(DraggedHint, true);
 215
 216         QString path(urlNavigator()->url().prettyUrl());
 217         path = path.section('/', 0, m_index);
 218
 219         Dolphin::mainWin().dropUrls(urls, KUrl(path));
 220
 221         setDisplayHintEnabled(DraggedHint, false);
 222         update();
 223     }*/
 224 }
 225
 226 void UrlNavigatorButton::dragEnterEvent(QDragEnterEvent* event)
 227 {
 228     /* KDE4-TODO:
 229     event->accept(KUrlDrag::canDecode(event));
 230
 231     setDisplayHintEnabled(DraggedHint, true);*/
 232     update();
 233 }
 234
 235 void UrlNavigatorButton::dragLeaveEvent(QDragLeaveEvent* event)
 236 {
 237     UrlButton::dragLeaveEvent(event);
 238
 239     setDisplayHintEnabled(DraggedHint, false);
 240     update();
 241 }
 242
 243
 244 void UrlNavigatorButton::updateNavigatorUrl()
 245 {
 246     if (m_index < 0) {
 247         return;
 248     }
 249
 250     UrlNavigator* navigator = urlNavigator();
 251     assert(navigator != 0);
 252     navigator->setUrl(navigator->url(m_index));
 253 }
 254
 255 void UrlNavigatorButton::startPopupDelay()
 256 {
 257     if (m_popupDelay->isActive() || m_listJob || m_index < 0) {
 258         return;
 259     }
 260
 261     m_popupDelay->start(300, true);
 262 }
 263
 264 void UrlNavigatorButton::stopPopupDelay()
 265 {
 266     m_popupDelay->stop();
 267     if (m_listJob) {
 268         m_listJob->kill();
 269         m_listJob = 0;
 270     }
 271 }
 272
 273 void UrlNavigatorButton::startListJob()
 274 {
 275     if (m_listJob) {
 276         return;
 277     }
 278
 279     KUrl url = urlNavigator()->url(m_index);
 280     m_listJob = KIO::listDir(url, false, false);
 281     m_subdirs.clear(); // just to be ++safe
 282
 283     connect(m_listJob, SIGNAL(entries(KIO::Job*, const KIO::UDSEntryList &)),
 284             this, SLOT(entriesList(KIO::Job*, const KIO::UDSEntryList&)));
 285     connect(m_listJob, SIGNAL(result(KJob*)), this, SLOT(listJobFinished(KJob*)));
 286 }
 287
 288 void UrlNavigatorButton::entriesList(KIO::Job* job, const KIO::UDSEntryList& entries)
 289 {
 290     if (job != m_listJob) {
 291         return;
 292     }
 293
 294     KIO::UDSEntryList::const_iterator it = entries.constBegin();
 295     KIO::UDSEntryList::const_iterator itEnd = entries.constEnd();
 296     while (it != itEnd) {
 297         QString name;
 298         bool isDir = false;
 299         KIO::UDSEntry entry = *it;
 300
 301         /* KDE3 reference:
 302             KIO::UDSEntry::const_iterator atomIt = entry.constBegin();
 303             KIO::UDSEntry::const_iterator atomEndIt = entry.constEnd();
 304
 305             while (atomIt != atomEndIt) {
 306             switch ((*atomIt).m_uds) {
 307                 case KIO::UDS_NAME:
 308                     name = (*atomIt).m_str;
 309                     break;
 310                 case KIO::UDS_FILE_TYPE:
 311                     isDir = S_ISDIR((*atomIt).m_long);
 312                     break;
 313                 default:
 314                     break;
 315             }
 316             ++atomIt;
 317          }
 318          if (isDir) {
 319              m_subdirs.append(name);
 320          }
 321         */
 322
 323         if (entry.isDir()) {
 324             m_subdirs.append(entry.stringValue(KIO::UDS_NAME));
 325         }
 326
 327         ++it;
 328     }
 329
 330     m_subdirs.sort();
 331 }
 332
 333 void UrlNavigatorButton::listJobFinished(KJob* job)
 334 {
 335     if (job != m_listJob) {
 336         return;
 337     }
 338
 339     if (job->error() || m_subdirs.isEmpty()) {
 340         // clear listing
 341         return;
 342     }
 343
 344     setDisplayHintEnabled(PopupActiveHint, true);
 345     update(); // ensure the button is drawn highlighted
 346     Q3PopupMenu* dirsMenu = new Q3PopupMenu(this);
 347     //setPopup(dirsMenu);
 348     QStringList::const_iterator it = m_subdirs.constBegin();
 349     QStringList::const_iterator itEnd = m_subdirs.constEnd();
 350     int i = 0;
 351     while (it != itEnd) {
 352         dirsMenu->insertItem(*it, i);
 353         ++i;
 354         ++it;
 355     }
 356
 357     int result = dirsMenu->exec(urlNavigator()->mapToGlobal(geometry().bottomLeft()));
 358
 359     if (result != -1) {
 360         KUrl url = urlNavigator()->url(m_index);
 361         url.addPath(m_subdirs[result]);
 362         urlNavigator()->setUrl(url);
 363     }
 364
 365     m_listJob = 0;
 366     m_subdirs.clear();
 367     delete dirsMenu;
 368     setDisplayHintEnabled(PopupActiveHint, false);
 369 }
 370
 371 int UrlNavigatorButton::arrowWidth() const
 372 {
 373     int width = (height() / 2) - 7;
 374     if (width < 4) {
 375         width = 4;
 376     }
 377     return width;
 378 }
 379
 380 bool UrlNavigatorButton::isTextClipped() const
 381 {
 382     int availableWidth = width();
 383     if (!isDisplayHintEnabled(ActivatedHint)) {
 384         availableWidth -= arrowWidth() + 1;
 385     }
 386
 387     QFontMetrics fontMetrics(font());
 388     return fontMetrics.width(text()) >= availableWidth;
 389 }
 390
 391 #include "urlnavigatorbutton.moc"