An example of Qtreewidget is that the C + + syntax and the item iteration loops are both ingenious

Source: Internet
Author: User

Study, it is said that Qtreewidget simple and easy to use, do not need to set the model and view alone, not delegate. Signal and slots should work correctly (not verified, supplemented later).

#include<QtGui/QApplication>#include<QTreeWidget>#include<QDebug>//define struct body, including only four pointerstypedefstruct {      Char* sect_id, * title, *Page_num; Char*parent_id;  } Sectioninfo; //Note 1, depending on the content (the last item) to set up a subordinate relationship//Note 2, they're not in order.Sectioninfo directory[] = {      {"Chapter 1","The Prehistory of C + +"," +",""},      {"Chapter 2","C with Classes"," -",""},      {"Section 1.1","Simula and distributed Systems"," +","Chapter 1"},      {"Section 1.2","C and Systems programming"," A","Chapter 1"},      {"Section 2.4","run-time Efficiency"," +","Chapter 2"},      {"Section 2.4.1","inlining"," -","Section 2.4"},  }; intMainintargcChar*argv[])      {qapplication app (argc, argv); Qtreewidget* Treewidget =NewQtreewidget (); //set the number of columns (bare simple rules of how many columns of the situation is rare AH)Treewidget->setcolumncount (3); //set up the table headerqstringlist headers; Headers<<" Section number"<<"Title"<<"Page Number"; Treewidget-setheaderlabels (headers); //The loop executes six times altogether     for(intI=0; i<sizeof(directory)/sizeof(directory[0]); i++) {Sectioninfo info= Directory[i];//Assigning a value to a C + + struct is quite ingenious.Qtreewidgetitem * item=NULL; if(strcmp (info.parent_id,"")==0) {Item=NewQtreewidgetitem (Treewidget);//set a line attached to the whole}Else{QString parent_id (info.parent_id);//gets the text of the current row parent node used to compareQtreewidgetitemiterator it (treewidget);//Gets the iteration subkey of the whole treewidget, note that it is a line iteration//until i=4, will not enter the while loop, 0 and 1 will not enter else,2 and 3 The first comparison will not be established, so will not enter while             while((*it)->text (0) = parent_id) {//text (0) is a function of Qtreewidgetitem, that is, the text of column 0thQdebug () << i <<"  "<< (*it)->text (0); ++it; } Item=NewQtreewidgetitem (*it);//Turn the last line of empty iterations into a row and set the found node as the parent node good        }          //with the item and can set the content        if(item) {Item->settext (0, info.sect_id); Item->settext (1, Info.title); Item->settext (2, Info.page_num); }} treewidget->resize ( -, $); Treewidget-Show (); returnapp.exec (); }  



An example of Qtreewidget is that the C + + syntax and the item iteration loops are both ingenious

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