Mercurial > octave-nkf

annotate libgui/qterminal/libqterminal/unix/ScreenWindow.h @ 19627:446c46af4b42 stable

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strip trailing whitespace from most source files * Makefile.am, NEWS, build-aux/common.mk, configure.ac, doc/Makefile.am, doc/doxyhtml/Makefile.am, doc/interpreter/Makefile.am, doc/interpreter/arith.txi, doc/interpreter/audio.txi, doc/interpreter/basics.txi, doc/interpreter/bugs.txi, doc/interpreter/container.txi, doc/interpreter/cp-idx.txi, doc/interpreter/data.txi, doc/interpreter/debug.txi, doc/interpreter/diagperm.txi, doc/interpreter/diffeq.txi, doc/interpreter/doccheck/README, doc/interpreter/doccheck/spellcheck, doc/interpreter/emacs.txi, doc/interpreter/errors.txi, doc/interpreter/eval.txi, doc/interpreter/expr.txi, doc/interpreter/external.txi, doc/interpreter/fn-idx.txi, doc/interpreter/func.txi, doc/interpreter/geometry.txi, doc/interpreter/geometryimages.m, doc/interpreter/gpl.txi, doc/interpreter/grammar.txi, doc/interpreter/gui.txi, doc/interpreter/image.txi, doc/interpreter/install.txi, doc/interpreter/interp.txi, doc/interpreter/interpimages.m, 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examples/standalonebuiltin.cc, libgui/Makefile.am, libgui/qterminal/libqterminal/README, libgui/qterminal/libqterminal/unix/BlockArray.cpp, libgui/qterminal/libqterminal/unix/BlockArray.h, libgui/qterminal/libqterminal/unix/Character.h, libgui/qterminal/libqterminal/unix/CharacterColor.h, libgui/qterminal/libqterminal/unix/Emulation.cpp, libgui/qterminal/libqterminal/unix/Emulation.h, libgui/qterminal/libqterminal/unix/Filter.cpp, libgui/qterminal/libqterminal/unix/Filter.h, libgui/qterminal/libqterminal/unix/History.cpp, libgui/qterminal/libqterminal/unix/History.h, libgui/qterminal/libqterminal/unix/KeyboardTranslator.cpp, libgui/qterminal/libqterminal/unix/KeyboardTranslator.h, libgui/qterminal/libqterminal/unix/LineFont.h, libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.cpp, libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.h, libgui/qterminal/libqterminal/unix/Screen.cpp, libgui/qterminal/libqterminal/unix/Screen.h, libgui/qterminal/libqterminal/unix/ScreenWindow.cpp, libgui/qterminal/libqterminal/unix/ScreenWindow.h, libgui/qterminal/libqterminal/unix/TerminalCharacterDecoder.cpp, libgui/qterminal/libqterminal/unix/TerminalCharacterDecoder.h, libgui/qterminal/libqterminal/unix/Vt102Emulation.h, libgui/qterminal/libqterminal/win32/QWinTerminalImpl.cpp, libgui/qterminal/qterminal/main.cpp, libgui/src/m-editor/file-editor-tab.cc, libgui/src/octave-gui.cc, libgui/src/octave-qt-link.cc, libinterp/corefcn/data.cc, libinterp/corefcn/defun-int.h, libinterp/corefcn/det.cc, libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/graphics.in.h, libinterp/corefcn/ls-mat5.cc, libinterp/corefcn/lu.cc, libinterp/corefcn/oct-tex-parser.yy, libinterp/corefcn/oct-tex-symbols.in, libinterp/corefcn/quadcc.cc, libinterp/corefcn/zfstream.cc, libinterp/dldfcn/__eigs__.cc, libinterp/dldfcn/__voronoi__.cc, libinterp/gendoc.pl, libinterp/genprops.awk, libinterp/mk-errno-list, libinterp/mk-pkg-add, libinterp/mkbuiltins, libinterp/mkdefs, 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scripts/statistics/distributions/unifrnd.m, scripts/statistics/distributions/wblrnd.m, scripts/statistics/models/module.mk, scripts/statistics/tests/kruskal_wallis_test.m, scripts/strings/base2dec.m, scripts/strings/deblank.m, scripts/strings/dec2base.m, scripts/strings/dec2bin.m, scripts/strings/dec2hex.m, scripts/strings/mat2str.m, scripts/strings/ostrsplit.m, scripts/strings/regexptranslate.m, scripts/strings/str2num.m, scripts/strings/strcat.m, scripts/strings/strjoin.m, scripts/strings/strsplit.m, scripts/strings/strtok.m, scripts/strings/strtrim.m, scripts/strings/strtrunc.m, scripts/strings/substr.m, scripts/testfun/__run_test_suite__.m, scripts/testfun/speed.m, scripts/testfun/test.m, scripts/time/asctime.m, scripts/time/datenum.m, scripts/time/datevec.m, scripts/time/weekday.m, src/Makefile.am, test/Makefile.am, test/build-bc-overload-tests.sh, test/build-sparse-tests.sh, test/jit.tst, test/line-continue.tst: Strip trailing whitespace.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 08:26:57 -0500
parents d63878346099
children
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1 /*
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2 Copyright (C) 2007, 2013 by Robert Knight <robertknight@gmail.com>
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3
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4 Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008
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5
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software
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18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 02110-1301 USA.
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20 */
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21
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22 #ifndef SCREENWINDOW_H
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23 #define SCREENWINDOW_H
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24
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25 // Qt
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26 #include <QtCore/QObject>
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27 #include <QtCore/QPoint>
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28 #include <QtCore/QRect>
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29
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30 // Konsole
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31 #include "unix/Character.h"
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32
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33 class Screen;
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34
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35 /**
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36 * Provides a window onto a section of a terminal screen.
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37 * This window can then be rendered by a terminal display widget ( TerminalDisplay ).
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38 *
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39 * To use the screen window, create a new ScreenWindow() instance and associated it with
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40 * a terminal screen using setScreen().
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41 * Use the scrollTo() method to scroll the window up and down on the screen.
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42 * Call the getImage() method to retrieve the character image which is currently visible in the window.
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43 *
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44 * setTrackOutput() controls whether the window moves to the bottom of the associated screen when new
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45 * lines are added to it.
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46 *
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47 * Whenever the output from the underlying screen is changed, the notifyOutputChanged() slot should
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48 * be called. This in turn will update the window's position and emit the outputChanged() signal
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49 * if necessary.
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50 */
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51 class ScreenWindow : public QObject
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52 {
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53 Q_OBJECT
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54
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55 public:
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56 /**
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57 * Constructs a new screen window with the given parent.
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58 * A screen must be specified by calling setScreen() before calling getImage() or getLineProperties().
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59 *
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60 * You should not call this constructor directly, instead use the Emulation::createWindow() method
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61 * to create a window on the emulation which you wish to view. This allows the emulation
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62 * to notify the window when the associated screen has changed and synchronize selection updates
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63 * between all views on a session.
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64 */
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65 ScreenWindow(QObject* parent = 0);
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66 virtual ~ScreenWindow();
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67
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68 /** Sets the screen which this window looks onto */
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69 void setScreen(Screen* screen);
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70 /** Returns the screen which this window looks onto */
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71 Screen* screen() const;
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72
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73 /**
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74 * Returns the image of characters which are currently visible through this window
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75 * onto the screen.
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76 *
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77 * The buffer is managed by the ScreenWindow instance and does not need to be
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78 * deleted by the caller.
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79 */
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80 Character* getImage();
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81
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82 /**
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83 * Returns the line attributes associated with the lines of characters which
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84 * are currently visible through this window
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85 */
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86 QVector<LineProperty> getLineProperties();
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87
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88 /**
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89 * Returns the number of lines which the region of the window
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90 * specified by scrollRegion() has been scrolled by since the last call
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91 * to resetScrollCount(). scrollRegion() is in most cases the
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92 * whole window, but will be a smaller area in, for example, applications
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93 * which provide split-screen facilities.
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94 *
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95 * This is not guaranteed to be accurate, but allows views to optimise
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96 * rendering by reducing the amount of costly text rendering that
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97 * needs to be done when the output is scrolled.
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98 */
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99 int scrollCount() const;
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100
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101 /**
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102 * Resets the count of scrolled lines returned by scrollCount()
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103 */
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104 void resetScrollCount();
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105
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106 /**
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107 * Returns the area of the window which was last scrolled, this is
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108 * usually the whole window area.
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109 *
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110 * Like scrollCount(), this is not guaranteed to be accurate,
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111 * but allows views to optimise rendering.
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112 */
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113 QRect scrollRegion() const;
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114
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115 /**
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116 * Sets the start of the selection to the given @p line and @p column within
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117 * the window.
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118 */
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119 void setSelectionStart( int column , int line , bool columnMode );
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120 /**
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121 * Sets the end of the selection to the given @p line and @p column within
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122 * the window.
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123 */
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124 void setSelectionEnd( int column , int line );
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125 /**
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126 * Retrieves the start of the selection within the window.
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127 */
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128 void getSelectionStart( int& column , int& line );
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129 /**
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130 * Retrieves the end of the selection within the window.
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131 */
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132 void getSelectionEnd( int& column , int& line );
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133 /**
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134 * Returns true if the character at @p line , @p column is part of the selection.
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135 */
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136 bool isSelected( int column , int line );
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137 /**
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138 * Clears the current selection
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139 */
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140 void clearSelection();
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141
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142 /** Sets the number of lines in the window */
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143 void setWindowLines(int lines);
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144 /** Returns the number of lines in the window */
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145 int windowLines() const;
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146 /** Returns the number of columns in the window */
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147 int windowColumns() const;
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148
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149 /** Returns the total number of lines in the screen */
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150 int lineCount() const;
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151 /** Returns the total number of columns in the screen */
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152 int columnCount() const;
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153
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154 /** Returns the index of the line which is currently at the top of this window */
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155 int currentLine() const;
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156
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157 /**
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158 * Returns the position of the cursor
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159 * within the window.
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160 */
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161 QPoint cursorPosition() const;
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162
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163 /**
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164 * Convenience method. Returns true if the window is currently at the bottom
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165 * of the screen.
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166 */
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167 bool atEndOfOutput() const;
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168
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169 /** Scrolls the window so that @p line is at the top of the window */
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170 void scrollTo( int line );
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171
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172 enum RelativeScrollMode
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173 {
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174 ScrollLines,
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175 ScrollPages
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176 };
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177
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178 /**
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179 * Scrolls the window relative to its current position on the screen.
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180 *
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181 * @param mode Specifies whether @p amount refers to the number of lines or the number
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182 * of pages to scroll.
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183 * @param amount The number of lines or pages ( depending on @p mode ) to scroll by. If
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184 * this number is positive, the view is scrolled down. If this number is negative, the view
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185 * is scrolled up.
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186 */
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187 void scrollBy( RelativeScrollMode mode , int amount );
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188
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189 /**
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190 * Specifies whether the window should automatically move to the bottom
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191 * of the screen when new output is added.
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192 *
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193 * If this is set to true, the window will be moved to the bottom of the associated screen ( see
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194 * screen() ) when the notifyOutputChanged() method is called.
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195 */
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196 void setTrackOutput(bool trackOutput);
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197 /**
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198 * Returns whether the window automatically moves to the bottom of the screen as
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199 * new output is added. See setTrackOutput()
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200 */
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201 bool trackOutput() const;
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202
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203 /**
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204 * Returns the text which is currently selected.
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205 *
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206 * @param preserveLineBreaks See Screen::selectedText()
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207 */
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208 QString selectedText( bool preserveLineBreaks ) const;
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209
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210 public slots:
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211 /**
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212 * Notifies the window that the contents of the associated terminal screen have changed.
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213 * This moves the window to the bottom of the screen if trackOutput() is true and causes
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214 * the outputChanged() signal to be emitted.
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215 */
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216 void notifyOutputChanged();
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217
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218 signals:
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219 /**
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220 * Emitted when the contents of the associated terminal screen ( see screen() ) changes.
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221 */
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222 void outputChanged();
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223
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224 /**
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225 * Emitted when the screen window is scrolled to a different position.
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226 *
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227 * @param line The line which is now at the top of the window.
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228 */
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229 void scrolled(int line);
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230
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231 /**
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232 * Emitted when the selection is changed.
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233 */
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234 void selectionChanged();
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235
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236 private:
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237 int endWindowLine() const;
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238 void fillUnusedArea();
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239
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240 Screen* _screen; // see setScreen() , screen()
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241 Character* _windowBuffer;
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242 int _windowBufferSize;
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243 bool _bufferNeedsUpdate;
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244
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245 int _windowLines;
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246 int _currentLine; // see scrollTo() , currentLine()
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247 bool _trackOutput; // see setTrackOutput() , trackOutput()
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248 int _scrollCount; // count of lines which the window has been scrolled by since
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249 // the last call to resetScrollCount()
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250 };
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251
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252 #endif // SCREENWINDOW_H