src/ui/LabelEntry.cc

   1 /* Shopper
   2  * Copyright (C) 2008 David Greaves
   3  *
   4  * This software is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public License
   6  * as published by the Free Software Foundation; either version 2.1 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This software is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this software; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  17  * 02110-1301 USA
  18  *
  19  */
  20 #define DEBUG_SHOPPER 1
  21 #include "shopper.h"           // automake, i8n, gettext
  22 #include "LabelEntry.h"
  23 #include <QtGui>
  24
  25 #define SCROLL_SENSITIVITY 20
  26 namespace Shopper
  27 {
  28         // SLabel a label that emits pressed() when clicked
  29         SLabel::SLabel(QWidget * parent, Qt::WindowFlags f ) :
  30                 QLabel(parent, f),
  31                 start_event_x(0),
  32                 start_event_y(0),
  33                 scrolling(false)
  34         {
  35         }
  36         SLabel::SLabel( const QString & text, QWidget * parent, Qt::WindowFlags f ) :
  37                 QLabel(text, parent, f),
  38                 start_event_x(0),
  39                 start_event_y(0),
  40                 scrolling(false)
  41         {
  42         }
  43         void SLabel::setVisible(bool vis)
  44         {
  45                 _ENTER;
  46                 QLabel::setVisible(vis);
  47         }
  48         void SLabel::mouseReleaseEvent ( QMouseEvent * event )
  49         {
  50                 if (event->button() == Qt::LeftButton) {
  51                         event->accept();
  52                         if (!scrolling) emit pressed();
  53                         scrolling = false;
  54                 }
  55                 event->ignore();
  56         }
  57         void SLabel::mouseMoveEvent ( QMouseEvent * event )
  58         {
  59                 if (scrolling or
  60                         abs(start_event_x - event->globalX()) > SCROLL_SENSITIVITY or
  61                         abs(start_event_y - event->globalY()) > SCROLL_SENSITIVITY) {
  62                         scrolling = true;
  63                 }
  64                 if (!scrolling) {
  65                         event->ignore();
  66                         return;
  67                 }
  68                 QObject *q = parent();
  69                 QString s;
  70                 while (q and (s = q->metaObject()->className()) != "Shopper::ListView"){
  71                         DEBUG("found " << s);
  72                         q = q->parent();
  73                 }
  74                 if (!q) {
  75                         DEBUG("No Shopper::ListView in parents");
  76                         return;
  77                 }
  78                 QScrollArea *qs = qobject_cast<QScrollArea *>(q);
  79                 int curr_y = event->globalY();
  80                 int max_y= qApp->desktop()->screenGeometry().height();
  81                 int s_min = qs->verticalScrollBar()->minimum();
  82                 int s_max = qs->verticalScrollBar()->maximum();
  83                 DEBUG(" curr_y["<<curr_y<<"] - start_event_y["<<start_event_y<<"])*2)) * (s_max["<<s_max<<"]-s_min["<<s_min<<"])/max_y["<<max_y<<"] + s_min["<<s_min<<"]");
  84                 int v = (((curr_y - start_event_y)*2) * (s_max-s_min))/max_y;
  85                 qs->verticalScrollBar()->setValue(v);
  86                 DEBUG("Scrolling to " << v);
  87
  88         }
  89         void SLabel::mousePressEvent ( QMouseEvent * event )
  90         {
  91                 if (event->button() == Qt::LeftButton){
  92                         start_event_x = event->globalX();
  93                         start_event_y = event->globalY();
  94                 }
  95                 event->ignore();
  96         }
  97         // LabelEntry - a label that turns into a textbox when clicked
  98         LabelEntry::LabelEntry(QWidget *parent) :
  99                 QWidget(parent),
 100                 data(""),
 101                 entry(NULL),
 102                 layout(this)
 103         {
 104                 init();
 105         }
 106         LabelEntry::LabelEntry(const QString & value, QWidget *parent) :
 107                 QWidget(parent),
 108                 data(value),
 109                 entry(NULL),
 110                 layout(this)
 111         {
 112                 init();
 113         }
 114         void LabelEntry::init()
 115         {
 116                 label = new SLabel(data, this);
 117                 connect(label, SIGNAL(pressed()),
 118                                 this, SLOT(label_clicked()));
 119                 layout.addWidget(label);
 120                 layout.setContentsMargins(0, 0, 0, 0);
 121                 label->show();
 122         }
 123         QString LabelEntry::getText()
 124         {
 125                 return data;
 126         }
 127
 128         void LabelEntry::label_clicked()
 129         {
 130                 _ENTER;
 131                 if (entry != NULL) return; // events may arrive post-creation
 132                 entry = new QLineEdit(this);
 133                 entry->setSizePolicy(label->sizePolicy());
 134 //              entry->set_activates_default(false);
 135 //              entry->set_width_chars(15); // FIXME
 136                 entry->setText(data);
 137                 // self-destruct on unfocus or activate
 138                 connect(entry, SIGNAL(editingFinished()),
 139                                 this, SLOT(entry_finished()));
 140
 141                 layout.removeWidget(label);
 142                 label->hide();
 143                 layout.addWidget(entry);
 144                 entry->show();
 145                 entry->setFocus(Qt::MouseFocusReason);
 146         }
 147         void LabelEntry::entry_finished()
 148         {
 149                 _ENTER;
 150                 if (entry == NULL) return; // events may arrive post-deletion
 151                 data=entry->text();
 152                 label->setText(data);
 153                 layout.removeWidget(entry);
 154                 entry->hide();
 155                 layout.addWidget(label);
 156                 label->show();
 157                 entry->deleteLater();   // We can now forget about it...
 158                 entry=NULL;
 159                 emit changed();
 160         }
 161         void LabelEntry::setAlignment ( Qt::Alignment al )
 162         {
 163                 label->setAlignment(al);
 164         }
 165         void LabelEntry::setText ( const QString & d )
 166         {
 167                 data = d;
 168         }
 169         void LabelEntry::setVisible(bool vis)
 170         {
 171                 _ENTER;
 172                 QWidget::setVisible(vis);
 173         }
 174
 175         void LabelEntry::setFrameStyle(int i)
 176         {
 177                 label->setFrameStyle(i);
 178         }
 179         void LabelEntry::setSizePolicy(QSizePolicy::Policy h, QSizePolicy::Policy v)
 180         {
 181                 QWidget::setSizePolicy(h,v);
 182                 label->setSizePolicy(h,v);
 183         }
 184         void LabelEntry::setSizePolicy(QSizePolicy p)
 185         {
 186                 _ENTER;
 187                 QWidget::setSizePolicy(p);
 188                 label->setSizePolicy(p);
 189         }
 190 }