[Qt] Librecad 源码分析

2019/12/03 14:40
阅读数 760

libraries

  • jwwlib
  • libdxfrw:一个免费的C++库,用于读写文本格式或二进制格式的DXF文件(C++ library to read and write DXF/DWG files)
  • muparser:一个跨平台的公式解析库,它可以自定义多参数函数,自定义常量、变量及一元前缀、后缀操作符,二元操作符等,它将公式编译成字节码,所以计算起来非常快

librecad

  • src:源文件
    • action:动作类
    • cmd:命令行
    • lib:各种库
      • actions:处理各种响应事件
      • creation
      • debug
      • engine
      • fileio
      • filter
      • generators
      • gui:界面显示
      • information
      • math
      • modification
      • printing
      • scripting
    • main:启动程序和窗口
    • plugins:插件
    • test
    • ui:界面控制

 

 

 

 

 

 qc_applicationwindow

 1 /**
 2  * Redraws all mdi windows.
 3  */
 4 void QC_ApplicationWindow::redrawAll()
 5 {
 6     if (mdiAreaCAD)
 7     {
 8         foreach (const QC_MDIWindow* win, window_list)
 9         {
10             if (win)
11             {
12                 QG_GraphicView* gv = win->getGraphicView();
13                 if (gv) {gv->redraw();}
14             }
15         }
16     }
17 }

\librecad\src\ui

qg_graphicView

updateGridStatusWidget()

1 /**
2  * Sets the text for the grid status widget in the left bottom corner.
3  */
4 void QG_GraphicView::updateGridStatusWidget(const QString& text)
5 {
6    emit gridStatusChanged(text);
7 }

wheelEvent()

1 /**
2  * mouse wheel event. zooms in/out or scrolls when
3  * shift or ctrl is pressed.
4  */
5 void QG_GraphicView::wheelEvent(QWheelEvent *e) {...}

 \librecad\src\lib\gui

rs_graphicview

centerOffsetX()

 1 /**
 2  * Centers the drawing in x-direction.
 3  */
 4 void RS_GraphicView::centerOffsetX() {
 5     if (container && !zoomFrozen) {
 6         offsetX = (int)(((getWidth()-borderLeft-borderRight)
 7                          - (container->getSize().x*factor.x))/2.0
 8                         - (container->getMin().x*factor.x)) + borderLeft;
 9     }
10 }

zoomScroll()

 1 /**
 2  * Scrolls in the given direction.
 3  */
 4 void RS_GraphicView::zoomScroll(RS2::Direction direction) {
 5     switch (direction) {
 6     case RS2::Up:
 7         offsetY-=50;
 8         break;
 9     case RS2::Down:
10         offsetY+=50;
11         break;
12     case RS2::Right:
13         offsetX+=50;
14         break;
15     case RS2::Left:
16         offsetX-=50;
17         break;
18     }
19     adjustOffsetControls();
20     adjustZoomControls();
21     //    updateGrid();
22 
23     redraw();
24 }

\librecad\src\actions

rs_actiondrawline()

 

<QCursor>

The QCursor class provides a mouse cursor with an arbitrary shape

<QDockWidget>

The QDockWidget class provides a widget that can be docked inside a QMainWindow or floated as a top-level window on the desktop

 

参考:

 https://blog.csdn.net/Caoyang_He/article/details/80343945

 

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