src/frontends/qt4/ButtonController.cpp

   1 /**
   2  * \file ButtonController.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Allan Rae
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "ButtonController.h"
  14 #include "debug.h"
  15 #include "qt_helpers.h"
  16
  17 #include <QPushButton>
  18 #include <QLineEdit>
  19 #include <QLabel>
  20 #include <QValidator>
  21
  22 namespace lyx {
  23 namespace frontend {
  24
  25 ButtonController::ButtonController()
  26         : okay_(0), apply_(0), cancel_(0), restore_(0),
  27                 policy_(ButtonPolicy::IgnorantPolicy)
  28 {}
  29
  30
  31 void ButtonController::setPolicy(ButtonPolicy::Policy policy)
  32 {
  33         policy_ = ButtonPolicy(policy);
  34 }
  35
  36
  37 void ButtonController::ok()
  38 {
  39         input(ButtonPolicy::SMI_OKAY);
  40 }
  41
  42
  43 void ButtonController::input(ButtonPolicy::SMInput in)
  44 {
  45         if (ButtonPolicy::SMI_NOOP == in)
  46                 return;
  47         policy_.input(in);
  48         refresh();
  49 }
  50
  51
  52 void ButtonController::apply()
  53 {
  54         input(ButtonPolicy::SMI_APPLY);
  55 }
  56
  57
  58 void ButtonController::cancel()
  59 {
  60         input(ButtonPolicy::SMI_CANCEL);
  61 }
  62
  63
  64 void ButtonController::restore()
  65 {
  66         input(ButtonPolicy::SMI_RESTORE);
  67 }
  68
  69
  70 void ButtonController::hide()
  71 {
  72         input(ButtonPolicy::SMI_HIDE);
  73 }
  74
  75
  76 void ButtonController::setValid(bool v)
  77 {
  78         input(v ? ButtonPolicy::SMI_VALID : ButtonPolicy::SMI_INVALID);
  79 }
  80
  81
  82 bool ButtonController::setReadOnly(bool ro)
  83 {
  84         LYXERR(Debug::GUI) << "Setting controller ro: " << ro << std::endl;
  85
  86         policy_.input(ro ?
  87                 ButtonPolicy::SMI_READ_ONLY : ButtonPolicy::SMI_READ_WRITE);
  88         refreshReadOnly();
  89         refresh();
  90         return ro;
  91 }
  92
  93
  94 void ButtonController::refresh() const
  95 {
  96         LYXERR(Debug::GUI) << "Calling BC refresh()" << std::endl;
  97
  98         bool const all_valid = checkWidgets();
  99
 100         if (okay_) {
 101                 bool const enabled =
 102                         all_valid && policy().buttonStatus(ButtonPolicy::OKAY);
 103                 okay_->setEnabled(enabled);
 104         }
 105         if (apply_) {
 106                 bool const enabled =
 107                         all_valid && policy().buttonStatus(ButtonPolicy::APPLY);
 108                 apply_->setEnabled(enabled);
 109         }
 110         if (restore_) {
 111                 bool const enabled =
 112                         all_valid && policy().buttonStatus(ButtonPolicy::RESTORE);
 113                 restore_->setEnabled(enabled);
 114         }
 115         if (cancel_) {
 116                 bool const enabled = policy().buttonStatus(ButtonPolicy::CANCEL);
 117                 if (enabled)
 118                         cancel_->setText(toqstr(_("Cancel")));
 119                 else
 120                         cancel_->setText(toqstr(_("Close")));
 121         }
 122 }
 123
 124
 125 void ButtonController::refreshReadOnly() const
 126 {
 127         if (read_only_.empty())
 128                 return;
 129
 130         bool const enable = !policy().isReadOnly();
 131
 132         Widgets::const_iterator end = read_only_.end();
 133         Widgets::const_iterator iter = read_only_.begin();
 134         for (; iter != end; ++iter)
 135                 setWidgetEnabled(*iter, enable);
 136 }
 137
 138
 139 void ButtonController::setWidgetEnabled(QWidget * obj, bool enabled) const
 140 {
 141         if (QLineEdit * le = qobject_cast<QLineEdit*>(obj))
 142                 le->setReadOnly(!enabled);
 143         else
 144                 obj->setEnabled(enabled);
 145
 146         obj->setFocusPolicy(enabled ? Qt::StrongFocus : Qt::NoFocus);
 147 }
 148
 149
 150 void ButtonController::addCheckedLineEdit(QLineEdit * input, QWidget * label)
 151 {
 152         checked_widgets.push_back(CheckedLineEdit(input, label));
 153 }
 154
 155
 156 bool ButtonController::checkWidgets() const
 157 {
 158         bool valid = true;
 159
 160         CheckedWidgetList::const_iterator it  = checked_widgets.begin();
 161         CheckedWidgetList::const_iterator end = checked_widgets.end();
 162
 163         for (; it != end; ++it)
 164                 valid &= it->check();
 165
 166         // return valid status after checking ALL widgets
 167         return valid;
 168 }
 169
 170
 171 //////////////////////////////////////////////////////////////
 172 //
 173 // CheckedLineEdit
 174 //
 175 //////////////////////////////////////////////////////////////
 176
 177 static void setWarningColor(QWidget * widget)
 178 {
 179         QPalette pal = widget->palette();
 180         pal.setColor(QPalette::Active, QPalette::Foreground, QColor(255, 0, 0));
 181         widget->setPalette(pal);
 182 }
 183
 184
 185 CheckedLineEdit::CheckedLineEdit(QLineEdit * input, QWidget * label)
 186         : input_(input), label_(label)
 187 {}
 188
 189
 190 bool CheckedLineEdit::check() const
 191 {
 192         QValidator const * validator = input_->validator();
 193         if (!validator)
 194                 return true;
 195
 196         QString t = input_->text();
 197         int p = 0;
 198         bool const valid = validator->validate(t, p) == QValidator::Acceptable;
 199
 200         // Visual feedback.
 201         if (valid)
 202                 input_->setPalette(QPalette());
 203         else
 204                 setWarningColor(input_);
 205
 206         if (!label_) {
 207                 if (valid)
 208                         label_->setPalette(QPalette());
 209                 else
 210                         setWarningColor(label_);
 211         }
 212
 213         return valid;
 214 }
 215
 216 } // namespace frontend
 217 } // namespace lyx