[Qt] Librecad 源碼分析

本文轉載自查看原文 2019-12-03 14:40 385 C++

libraries

jwwlib
libdxfrw：一個免費的C++庫，用於讀寫文本格式或二進制格式的DXF文件（C++ library to read and write DXF/DWG files）
muparser：一個跨平台的公式解析庫，它可以自定義多參數函數，自定義常量、變量及一元前綴、后綴操作符，二元操作符等，它將公式編譯成字節碼，所以計算起來非常快

librecad

src：源文件
- action：動作類
- cmd：命令行
- lib：各種庫
  - actions：處理各種響應事件
  - creation
  - debug
  - engine
  - fileio
  - filter
  - generators
  - gui：界面顯示
  - information
  - math
  - modification
  - printing
  - scripting
- main：啟動程序和窗口
- 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()

The QCursor class provides a mouse cursor with an arbitrary shape

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

參考：

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

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