Qt 學習筆記 TreeWidget 增刪改

在窗體上放乙個treewidget控制項和四個pushbutton加乙個horizontal spacer

布局如圖

給樹新增元素節點的方法和實現

.**件

qtreewidgetitem *addtreeroot(qstring name,qstring desc);

qtreewidgetitem * addtreenode(qtreewidgetitem *parent,qstring name,qstring desc);

qtreewidgetitem *treeviewview::addtreeroot(qstring name,qstring desc)

qtreewidgetitem * treeviewview::addtreenode(qtreewidgetitem *parent,qstring name,qstring desc)

當然可以設定header不顯示，根據你的需求定

ui->tv_source->setcolumncount(2

);    ui->tv_source->setheaderlabels(qstringlist()<
name
"<
description");
//ui->tv_source->setheaderhidden(true);
qtreewidgetitem * beijingitem = addtreeroot("
bejing
","city");
addtreenode(beijingitem,
"haidian
","haidian");
addtreenode(beijingitem,
"chaoyang
","chaoyang");
addtreenode(beijingitem,
"fengtai
","fengtai");
qtreewidgetitem * heibeiitem =addtreeroot("
hebei
","city");
addtreenode(heibeiitem,
"baoding
","baoding");
addtreenode(heibeiitem,
"shijiazhuang
","shijiazhuang
");

直接呼叫我的前邊寫的方法，因為treewidget一直是選中狀態就加了乙個

新增根節點的槽

void

treeviewview::on_btn_add_clicked()
else
}void
treeviewview::on_btn_addroot_clicked()

void

treeviewview::on_btn_modify_clicked()
for(int i=0;icolumncount();i++)
}

要看它有沒有父節點

void

treeviewview::on_btn_del_clicked()
//如果沒有父節點就直接刪除
if(currentitem->parent()==q_nullptr)
else
}

完整**

.**件

#ifndef treeviewview_h

#define treeviewview_h#include 
#include
#include
namespace
ui class treeviewview : public
qdialog
;#endif
//treeviewview_h

#include "

treeviewview.h
"#include 
"ui_treeviewview.h
"#include 
treeviewview::treeviewview(qwidget *parent) :
qdialog(parent),
ui(newui::treeviewview)
treeviewview::~treeviewview()
qtreewidgetitem *treeviewview::addtreeroot(qstring name,qstring desc)
qtreewidgetitem * treeviewview::addtreenode(qtreewidgetitem *parent,qstring name,qstring desc)
void treeviewview::on_tv_source_currentitemchanged(qtreewidgetitem *current, qtreewidgetitem *previous)
current->settextcolor(0
,qt::blue);
current->settextcolor(1
,qt::blue);
current->setbackground(0
,qt::red);
current->setbackground(1
,qt::red);
}void
treeviewview::on_btn_add_clicked()
else
}void
treeviewview::on_btn_addroot_clicked()
void
treeviewview::on_btn_del_clicked()
//如果沒有父節點就直接刪除
if(currentitem->parent()==q_nullptr)
else
}void
treeviewview::on_btn_modify_clicked()
for(int i=0;icolumncount();i++)
}

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