ground/gcs/src/libs/utils/basevalidatinglineedit.cpp

   1 /**
   2  ******************************************************************************
   3  *
   4  * @file       basevalidatinglineedit.cpp
   5  * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
   6  *             Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
   7  * @brief
   8  * @see        The GNU Public License (GPL) Version 3
   9  * @defgroup
  10  * @{
  11  *
  12  *****************************************************************************/
  13 /*
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 3 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful, but
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  21  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  22  * for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License along
  25  * with this program; if not, write to the Free Software Foundation, Inc.,
  26  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  27  */
  28
  29 #include "basevalidatinglineedit.h"
  30
  31 #include <QtCore/QDebug>
  32
  33 enum { debug = 0 };
  34
  35 namespace Utils {
  36 struct BaseValidatingLineEditPrivate {
  37     explicit BaseValidatingLineEditPrivate(const QWidget *w);
  38
  39     const QColor m_okTextColor;
  40     QColor  m_errorTextColor;
  41
  42     BaseValidatingLineEdit::State m_state;
  43     QString m_errorMessage;
  44     QString m_initialText;
  45     bool    m_firstChange;
  46 };
  47
  48 BaseValidatingLineEditPrivate::BaseValidatingLineEditPrivate(const QWidget *w) :
  49     m_okTextColor(BaseValidatingLineEdit::textColor(w)),
  50     m_errorTextColor(Qt::red),
  51     m_state(BaseValidatingLineEdit::Invalid),
  52     m_firstChange(true)
  53 {}
  54
  55 BaseValidatingLineEdit::BaseValidatingLineEdit(QWidget *parent) :
  56     QLineEdit(parent),
  57     m_bd(new BaseValidatingLineEditPrivate(this))
  58 {
  59     // Note that textChanged() is also triggered automagically by
  60     // QLineEdit::setText(), no need to trigger manually.
  61     connect(this, SIGNAL(textChanged(QString)), this, SLOT(slotChanged(QString)));
  62 }
  63
  64 BaseValidatingLineEdit::~BaseValidatingLineEdit()
  65 {
  66     delete m_bd;
  67 }
  68
  69 QString BaseValidatingLineEdit::initialText() const
  70 {
  71     return m_bd->m_initialText;
  72 }
  73
  74 void BaseValidatingLineEdit::setInitialText(const QString &t)
  75 {
  76     if (m_bd->m_initialText != t) {
  77         m_bd->m_initialText = t;
  78         m_bd->m_firstChange = true;
  79         setText(t);
  80     }
  81 }
  82
  83 QColor BaseValidatingLineEdit::errorColor() const
  84 {
  85     return m_bd->m_errorTextColor;
  86 }
  87
  88 void BaseValidatingLineEdit::setErrorColor(const QColor &c)
  89 {
  90     m_bd->m_errorTextColor = c;
  91 }
  92
  93 QColor BaseValidatingLineEdit::textColor(const QWidget *w)
  94 {
  95     return w->palette().color(QPalette::Active, QPalette::Text);
  96 }
  97
  98 void BaseValidatingLineEdit::setTextColor(QWidget *w, const QColor &c)
  99 {
 100     QPalette palette = w->palette();
 101
 102     palette.setColor(QPalette::Active, QPalette::Text, c);
 103     w->setPalette(palette);
 104 }
 105
 106 BaseValidatingLineEdit::State BaseValidatingLineEdit::state() const
 107 {
 108     return m_bd->m_state;
 109 }
 110
 111 bool BaseValidatingLineEdit::isValid() const
 112 {
 113     return m_bd->m_state == Valid;
 114 }
 115
 116 QString BaseValidatingLineEdit::errorMessage() const
 117 {
 118     return m_bd->m_errorMessage;
 119 }
 120
 121 void BaseValidatingLineEdit::slotChanged(const QString &t)
 122 {
 123     m_bd->m_errorMessage.clear();
 124     // Are we displaying the initial text?
 125     const bool isDisplayingInitialText = !m_bd->m_initialText.isEmpty() && t == m_bd->m_initialText;
 126     const State newState = isDisplayingInitialText ?
 127                            DisplayingInitialText :
 128                            (validate(t, &m_bd->m_errorMessage) ? Valid : Invalid);
 129     setToolTip(m_bd->m_errorMessage);
 130     if (debug) {
 131         qDebug() << Q_FUNC_INFO << t << "State" << m_bd->m_state << "->" << newState << m_bd->m_errorMessage;
 132     }
 133     // Changed..figure out if valid changed. DisplayingInitialText is not valid,
 134     // but should not show error color. Also trigger on the first change.
 135     if (newState != m_bd->m_state || m_bd->m_firstChange) {
 136         const bool validHasChanged = (m_bd->m_state == Valid) != (newState == Valid);
 137         m_bd->m_state = newState;
 138         m_bd->m_firstChange = false;
 139         setTextColor(this, newState == Invalid ? m_bd->m_errorTextColor : m_bd->m_okTextColor);
 140         if (validHasChanged) {
 141             emit validChanged(newState == Valid);
 142             emit validChanged();
 143         }
 144     }
 145 }
 146
 147 void BaseValidatingLineEdit::slotReturnPressed()
 148 {
 149     if (isValid()) {
 150         emit validReturnPressed();
 151     }
 152 }
 153
 154 void BaseValidatingLineEdit::triggerChanged()
 155 {
 156     slotChanged(text());
 157 }
 158 } // namespace Utils