QT excellent open source project 13: qscintilla

Scintilla It's a free one 、 Cross platform 、 Edit controls that support syntax highlighting . It fully supports source code editing and debugging , Including syntax highlighting 、 Misdirection 、 Automatic completion （code completion） And function tips （call tips）. For detailed introduction, please refer to ：https://www.scintilla.org/
without doubt ,Notepad++ Is the most famous based on Scintilla Open source editor for , It is completely used. C++ Realization

and QScintilla yes Scintilla stay QT Transplantation on , Using this library can make development more convenient Qt Program  

One . download

QScintilla Its official website ：https://qscintilla.com/ 
Download address ：Riverbank Computing | Download
Be careful ： There are multiple versions , and 2.12 And later versions , No longer supported Qt4 and Qt5 了 , So there is no in the source code QT4QT5 This catalog is . What I download here is 2.11.6 This version . I used it here QT The version is Qt 5.12.2. Unzip after download , Its directory structure is as follows ：

Directory name	purpose
Qt4Qt5	Compile folder , Generate corresponding DLL file
designer-Qt4Qt5	Compilation folder of relevant designer plug-ins
example-Qt4Qt5	Simple sample folder
doc	Use Doxygen Generated help documents
lexers	Implemented parsers
...	...

This article only demonstrates how to compile and generate dll, About Qt Designer Compilation of plug-ins , See ：QScintilla Installation and introduction of

Two . Compiling and testing

open Qt4Qt5 In folder qscintilla.pro The file can be compiled directly , No error reported , Here we use debug Version as an example , After compilation , Will be in debug Generate... In directory qscintilla2_qt5d.lib and qscintilla2_qt5d.dll file
Tests can be used directly example-Qt4Qt5 In folder application engineering , But you're right application.pro The document is slightly revised , The revised document is as follows ：

QT += core gui widgets

CONFIG      += qscintilla2

HEADERS      = mainwindow.h
SOURCES      = main.cpp mainwindow.cpp
RESOURCES    = application.qrc

INCLUDEPATH += ../Qt4Qt5

LIBS += qscintilla2_qt5d.lib

because application It's used in the project Qt4Qt5/Qsci Header file in , Therefore, it is necessary to Qt4Qt5 The directory contains to INCLUDEPATH in
Then compile the previously compiled qscintilla2_qt5d.lib copy to example-Qt4Qt5 in
In this way, you can compile normally application Engineering. , To run , You have to qscintilla2_qt5d.dll copy to application.exe In the directory
Runtime , As shown below ：

3、 ... and . Class hierarchy

  The picture is from ：https://qscintilla.com/#editor
1. The most basic class is QSciScintillaBase, It is ⽂ The base class of this editor , This kind of bottom layer , Usually not used directly .QScintilla The library provides ⼀ Upper layer ⼦ class QSciScintlla , It is ⽂ This editor class , There are many similar to Qt Of API . If the class is missing some of the required ⾮ Often specific functions , At this time, you can inherit its ⽗ class QSciScintillaBase.
2. Syntax highlighted objects are called lexical analyzers . After creating and configuring such a lexical analyzer object , Just apply it to ⽂ This editor （QSciScintilla object ） Then you can . About the implementation of lexical analyzer ,QScintilla Provides QSciLexer class , This category is ⼀ An abstract class , So before you create an object , It needs to be subclassed .
3.⼀ A good one ⽂ This editor provides more than just syntax highlighting , It also needs functions such as function parameter prompt and automatic completion . These functions exist in QSciAPI Class . Just create from this class ⼀ An example , And apply it to QSciLexer In the object . Its parent class is an abstract class , Class called QSciAbstractAPIs.

For more information, please refer to the official documents

Link to the original text ：https://blog.csdn.net/caoshangpa/article/details/125974273