/usr/include/Wt/WCheckBox is in libwt-dev 3.3.3+dfsg-4.1.
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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | // This may look like C code, but it's really -*- C++ -*-
/*
 * Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
 *
 * See the LICENSE file for terms of use.
 */
#ifndef WCHECKBOX_H_
#define WCHECKBOX_H_
#include <Wt/WAbstractToggleButton>
namespace Wt {
/*! \class WCheckBox Wt/WCheckBox Wt/WCheckBox
 *  \brief A user control that represents a check box.
 *
 * By default, a checkbox can have two states: Wt::Checked or
 * Wt::Unchecked, which can be inspected using isChecked(), and set
 * using setChecked().
 *
 * A checkbox may also provide a third state, Wt::PartiallyChecked,
 * which is useful to indicate that it is neither checked nor
 * unchecked. %Wt will use native browser support for this HTML5
 * extension when available (Safari and MS IE), and use an image-based
 * workaround otherwise. You may enable support for the third state
 * using setTristate(), and use setCheckState() and checkState() to
 * read all three states.
 * Once a tri-state checkbox is clicked, it cycles through the states
 * Wt::Checked and Wt::Unchecked.
 *
 * A label is added as a sibling of the checkbox to the same parent.
 *
 * Usage example:
 * \if cpp
 * \code
 * Wt::WGroupBox *box = new Wt::WGroupBox("In-flight options");
 *
 * Wt::WCheckBox *w1 = new Wt::WCheckBox("Vegetarian diet", box);
 * box->addWidget(new WBreak());
 * Wt::WCheckBox *w2 = new Wt::WCheckBox("WIFI access", box);
 * box->addWidget(new WBreak());
 * Wt::WCheckBox *w3 = new Wt::WCheckBox("AC plug", box);
 *
 * w1->setChecked(false);
 * w2->setChecked(true);
 * w3->setChecked(true);
 * \endcode
 * \elseif java
 * \code
 * WGroupBox box = new WGroupBox("In-flight options");
 *		 
 * WCheckBox w1 = new WCheckBox("Vegetarian diet", box);
 * box.addWidget(new WBreak());
 * WCheckBox w2 = new WCheckBox("WIFI access", box);
 * box.addWidget(new WBreak());
 * WCheckBox w3 = new WCheckBox("AC plug", box);
 *		 
 * w1.setChecked(false);
 * w2.setChecked(true);
 * w3.setChecked(true);
 * \endcode
 * \endif
 *
 * %WCheckBox is an \link WWidget::setInline(bool) inline \endlink widget.
 *
 * <h3>CSS</h3>
 *
 * This widget is rendered using an HTML <tt><input
 * type="checkbox"></tt> tag. When a label is specified, the input
 * element is nested in a <tt><label></tt>.
 *
 * This widget does not provide styling, and can be styled using
 * inline or external CSS as appropriate.
 *
 * \sa WAbstractToggleButton
 */
class WT_API WCheckBox : public WAbstractToggleButton
{
public:
  /*! \brief Creates a checkbox without label.
   *
   * A checkbox created by this constructor will not contain a placeholder
   * for a label, and therefore it is not possible to assign a label to it
   * later through setText().
   */
  WCheckBox(WContainerWidget *parent = 0);
  /*! \brief Creates a checkbox with given label.
   */
  WCheckBox(const WString& text, WContainerWidget *parent = 0);
  /*! \brief Makes a tristate checkbox.
   *
   * \note You should enable tristate functionality right after construction
   *       and this cannot be modified later.
   */
  void setTristate(bool tristate = true);
  /*! \brief Returns whether the checkbox is tristate.
   *
   * \sa setTristate()
   */
  bool isTristate() const { return triState_; }
  /*! \brief Sets the check state.
   *
   * Unless it is a tri-state checkbox, only Wt::Checked and Wt::Unchecked are
   * valid states.
   */
  void setCheckState(CheckState state);
  /*! \brief Returns the check state.
   *
   * \sa setCheckState(), isChecked()
   */
  CheckState checkState() const { return state_; }
protected:
  virtual void updateInput(DomElement& input, bool all);
private:
  bool triState_;
};
}
#endif // WCHECKBOX_H_
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