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added exercise15 for chapter12
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‎Chapter12/README.md

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@@ -141,3 +141,6 @@ Define a `Binary_tree` class derived from `Shape`. Give the number of levels as
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## [Exercise 14](exercises/14)
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Modify `Binary_tree` to draw its nodes using a virtual function. Then, derive a new class from `Binary_tree` that overrides that virtual function to use a different representation for a node (e.g., a triangle).
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## [Exercise 15](exercises/15)
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Modify `Binary_tree` to take a parameter (or parameters) to indicate what kind of line to use to connect the nodes (e.g., an arrow pointing down or a red arrow pointing up). Note how this exercise and the last use two alternative ways of making a class hierarchy more flexible and useful.

‎Chapter12/exercises/15/CMakeLists.txt

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cmake_minimum_required(VERSION 3.5)
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project(Programming_Qt VERSION 0.1 LANGUAGES CXX)
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set(CMAKE_AUTOUIC ON)
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set(CMAKE_AUTOMOC ON)
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set(CMAKE_AUTORCC ON)
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set(CMAKE_CXX_STANDARD 20)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
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find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets)
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set(PROJECT_SOURCES
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main.cpp
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PPP/Window.h
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PPP/Graph.h
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PPP/GUI.h
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PPP/Simple_window.h
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PPP/Point.h
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PPP/std_lib_facilities.h
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Window.cpp
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Graph.cpp
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PPP/Image_private.h
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GUI.cpp
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PPP/GUI_private.h
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Simple_window.cpp
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Colormap.cpp
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)
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if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
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qt_add_executable(Programming_Qt
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MANUAL_FINALIZATION
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${PROJECT_SOURCES}
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)
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# Define target properties for Android with Qt 6 as:
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# set_property(TARGET Programming_Qt APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
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# ${CMAKE_CURRENT_SOURCE_DIR}/android)
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# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
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else()
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if(ANDROID)
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add_library(Programming_Qt SHARED
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${PROJECT_SOURCES}
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)
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# Define properties for Android with Qt 5 after find_package() calls as:
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# set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
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else()
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add_executable(Programming_Qt
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${PROJECT_SOURCES}
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)
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endif()
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endif()
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target_link_libraries(Programming_Qt PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
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target_include_directories(Programming_Qt PRIVATE .)
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set_target_properties(Programming_Qt PROPERTIES
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MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
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MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
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MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
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MACOSX_BUNDLE TRUE
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WIN32_EXECUTABLE TRUE
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)
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if(MSVC)
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target_compile_options(Programming_Qt PRIVATE /EHsc /W4 /WX)
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else()
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target_compile_options(Programming_Qt PRIVATE -Wall -Wextra -Wpedantic -Werror)
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endif()
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if (EMSCRIPTEN)
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target_link_options(Programming_Qt PUBLIC -sASYNCIFY -Os)
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endif()
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install(TARGETS Programming_Qt
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BUNDLE DESTINATION .
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LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
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if(QT_VERSION_MAJOR EQUAL 6)
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qt_finalize_executable(Programming_Qt)
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endif()

‎Chapter12/exercises/15/Colormap.cpp

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#include <QColor>
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#include <PPP/Image_private.h>
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static QColor paletteColorMap[]
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= {{0, 0, 0}, {255, 0, 0}, {0, 255, 0}, {255, 255, 0}, {0, 0, 255},
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{255, 0, 255}, {0, 255, 255}, {255, 255, 255}, {85, 85, 85}, {198, 113, 113},
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{113, 198, 113}, {142, 142, 56}, {113, 113, 198}, {142, 56, 142}, {56, 142, 142},
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{0, 0, 128}, {168, 168, 152}, {232, 232, 216}, {104, 104, 88}, {152, 168, 168},
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{216, 232, 232}, {88, 104, 104}, {156, 156, 168}, {220, 220, 232}, {92, 92, 104},
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{156, 168, 156}, {220, 232, 220}, {92, 104, 92}, {144, 144, 144}, {192, 192, 192},
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{80, 80, 80}, {160, 160, 160}, {0, 0, 0}, {13, 13, 13}, {26, 26, 26},
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{38, 38, 38}, {49, 49, 49}, {61, 61, 61}, {72, 72, 72}, {85, 85, 85},
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{95, 95, 95}, {106, 106, 106}, {117, 117, 117}, {128, 128, 128}, {138, 138, 138},
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{149, 149, 149}, {160, 160, 160}, {170, 170, 170}, {181, 181, 181}, {192, 192, 192},
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{203, 203, 203}, {213, 213, 213}, {224, 224, 224}, {234, 234, 234}, {245, 245, 245},
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{255, 255, 255}, {0, 0, 0}, {0, 36, 0}, {0, 72, 0}, {0, 109, 0},
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{0, 145, 0}, {0, 182, 0}, {0, 218, 0}, {0, 255, 0}, {63, 0, 0},
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{63, 36, 0}, {63, 72, 0}, {63, 109, 0}, {63, 145, 0}, {63, 182, 0},
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{63, 218, 0}, {63, 255, 0}, {127, 0, 0}, {127, 36, 0}, {127, 72, 0},
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{127, 109, 0}, {127, 145, 0}, {127, 182, 0}, {127, 218, 0}, {127, 255, 0},
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{191, 0, 0}, {191, 36, 0}, {191, 72, 0}, {191, 109, 0}, {191, 145, 0},
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{191, 182, 0}, {191, 218, 0}, {191, 255, 0}, {255, 0, 0}, {255, 36, 0},
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{255, 72, 0}, {255, 109, 0}, {255, 145, 0}, {255, 182, 0}, {255, 218, 0},
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{255, 255, 0}, {0, 0, 63}, {0, 36, 63}, {0, 72, 63}, {0, 109, 63},
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{0, 145, 63}, {0, 182, 63}, {0, 218, 63}, {0, 255, 63}, {63, 0, 63},
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{63, 36, 63}, {63, 72, 63}, {63, 109, 63}, {63, 145, 63}, {63, 182, 63},
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{63, 218, 63}, {63, 255, 63}, {127, 0, 63}, {127, 36, 63}, {127, 72, 63},
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{127, 109, 63}, {127, 145, 63}, {127, 182, 63}, {127, 218, 63}, {127, 255, 63},
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{191, 0, 63}, {191, 36, 63}, {191, 72, 63}, {191, 109, 63}, {191, 145, 63},
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{191, 182, 63}, {191, 218, 63}, {191, 255, 63}, {255, 0, 63}, {255, 36, 63},
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{255, 72, 63}, {255, 109, 63}, {255, 145, 63}, {255, 182, 63}, {255, 218, 63},
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{255, 255, 63}, {0, 0, 127}, {0, 36, 127}, {0, 72, 127}, {0, 109, 127},
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{0, 145, 127}, {0, 182, 127}, {0, 218, 127}, {0, 255, 127}, {63, 0, 127},
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{63, 36, 127}, {63, 72, 127}, {63, 109, 127}, {63, 145, 127}, {63, 182, 127},
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{63, 218, 127}, {63, 255, 127}, {127, 0, 127}, {127, 36, 127}, {127, 72, 127},
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{127, 109, 127}, {127, 145, 127}, {127, 182, 127}, {127, 218, 127}, {127, 255, 127},
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{191, 0, 127}, {191, 36, 127}, {191, 72, 127}, {191, 109, 127}, {191, 145, 127},
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{191, 182, 127}, {191, 218, 127}, {191, 255, 127}, {255, 0, 127}, {255, 36, 127},
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{255, 72, 127}, {255, 109, 127}, {255, 145, 127}, {255, 182, 127}, {255, 218, 127},
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{255, 255, 127}, {0, 0, 191}, {0, 36, 191}, {0, 72, 191}, {0, 109, 191},
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{0, 145, 191}, {0, 182, 191}, {0, 218, 191}, {0, 255, 191}, {63, 0, 191},
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{63, 36, 191}, {63, 72, 191}, {63, 109, 191}, {63, 145, 191}, {63, 182, 191},
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{63, 218, 191}, {63, 255, 191}, {127, 0, 191}, {127, 36, 191}, {127, 72, 191},
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{127, 109, 191}, {127, 145, 191}, {127, 182, 191}, {127, 218, 191}, {127, 255, 191},
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{191, 0, 191}, {191, 36, 191}, {191, 72, 191}, {191, 109, 191}, {191, 145, 191},
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{191, 182, 191}, {191, 218, 191}, {191, 255, 191}, {255, 0, 191}, {255, 36, 191},
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{255, 72, 191}, {255, 109, 191}, {255, 145, 191}, {255, 182, 191}, {255, 218, 191},
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{255, 255, 191}, {0, 0, 255}, {0, 36, 255}, {0, 72, 255}, {0, 109, 255},
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{0, 145, 255}, {0, 182, 255}, {0, 218, 255}, {0, 255, 255}, {63, 0, 255},
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{63, 36, 255}, {63, 72, 255}, {63, 109, 255}, {63, 145, 255}, {63, 182, 255},
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{63, 218, 255}, {63, 255, 255}, {127, 0, 255}, {127, 36, 255}, {127, 72, 255},
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{127, 109, 255}, {127, 145, 255}, {127, 182, 255}, {127, 218, 255}, {127, 255, 255},
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{191, 0, 255}, {191, 36, 255}, {191, 72, 255}, {191, 109, 255}, {191, 145, 255},
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{191, 182, 255}, {191, 218, 255}, {191, 255, 255}, {255, 0, 255}, {255, 36, 255},
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{255, 72, 255}, {255, 109, 255}, {255, 145, 255}, {255, 182, 255}, {255, 218, 255},
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{255, 255, 255}};
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namespace Graph_lib {
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QColor mapPaletteColor(int rawColor)
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{
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return paletteColorMap[rawColor % 256];
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}
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} // namespace Graph_lib

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