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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the Qt3Support module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "q3button.h" |
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43 #include "qpainter.h" |
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44 |
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45 QT_BEGIN_NAMESPACE |
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46 |
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47 /*! |
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48 \class Q3Button |
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49 \brief The Q3Button class is a compatibility base class of button |
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50 widgets |
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51 |
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52 \compat |
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53 |
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54 \bold{In new code, use QAbstractButton.} |
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55 |
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56 To subclass Q3Button, you must reimplement at least drawButton() |
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57 (to draw the button's outline) and drawButtonLabel() (to draw its |
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58 text or pixmap). It is generally advisable to reimplement |
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59 sizeHint() as well, and sometimes hitButton() (to determine |
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60 whether a button press is within the button). |
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61 */ |
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62 |
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63 /*! |
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64 Constructs a standard button called \a name with parent \a parent, |
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65 using the widget flags \a f. |
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66 */ |
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67 |
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68 Q3Button::Q3Button( QWidget *parent, const char *name, Qt::WindowFlags f ) |
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69 : QAbstractButton( parent, name, f ) |
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70 { |
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71 } |
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72 |
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73 /*! |
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74 Destroys the button. |
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75 */ |
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76 Q3Button::~Q3Button() |
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77 { |
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78 } |
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79 |
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80 /*! |
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81 \fn void Q3Button::paintEvent( QPaintEvent *event) |
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82 |
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83 Handles paint events, received in \a event, for buttons. Small and |
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84 typically complex buttons are painted double-buffered to reduce |
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85 flicker. The actually drawing is done in the virtual functions |
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86 drawButton() and drawButtonLabel(). |
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87 |
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88 \sa drawButton(), drawButtonLabel() |
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89 */ |
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90 void Q3Button::paintEvent( QPaintEvent *) |
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91 { |
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92 QPainter p(this); |
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93 drawButton( &p ); |
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94 } |
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95 |
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96 /*! |
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97 \fn void Q3Button::drawButton( QPainter *painter) |
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98 |
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99 Draws the button on the given \a painter. The default |
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100 implementation does nothing. |
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101 |
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102 This virtual function is reimplemented by subclasses to draw real |
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103 buttons. At some point, these reimplementations should call |
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104 drawButtonLabel(). |
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105 |
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106 \sa drawButtonLabel(), paintEvent() |
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107 */ |
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108 void Q3Button::drawButton( QPainter * ) |
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109 { |
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110 } |
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111 |
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112 /*! |
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113 \fn void Q3Button::drawButtonLabel( QPainter *painter ) |
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114 |
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115 Draws the button text or pixmap on the given \a painter. |
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116 |
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117 This virtual function is reimplemented by subclasses to draw real |
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118 buttons. It is invoked by drawButton(). |
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119 |
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120 \sa drawButton(), paintEvent() |
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121 */ |
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122 |
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123 void Q3Button::drawButtonLabel( QPainter * ) |
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124 { |
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125 } |
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126 |
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127 QT_END_NAMESPACE |