QTreeWidget实例，读写Xml功能、可拖动、编辑，创建、删除项等

/**************************************************************************** ** Resource object code ** ** Created by: The Resource Compiler for Qt version 5.8.0 ** ** WARNING! All changes made in this file will be lost! *****************************************************************************/ static const unsigned char qt_resource_data[] = { // E:/QtXmlTest/QtXmlTest/Resources/image/channel.png 0x0,0x0,0x5,0xad, 0x89, 0x50,0x4e,0x47,0xd,0xa,0x1a,0xa,0x0,0x0,0x0,0xd,0x49,0x48,0x44,0x52,0x0, 0x0,0x0,0x10,0x0,0x0,0x0,0x10,0x8,0x3,0x0,0x0,0x0,0x28,0x2d,0xf,0x53, 0x0,0x0,0x0,0x4,0x67,0x41,0x4d,0x41,0x0,0x0,0xb1,0x8e,0x7c,0xfb,0x51,0x93, 0x0,0x0,0x0,0x20,0x63,0x48,0x52,0x4d,0x0,0x0,0x7a,0x25,0x0,0x0,0x80,0x83, 0x0,0x0,0xf9,0xff,0x0,0x0,0x80,0xe9,0x0,0x0,0x75,0x30,0x0,0x0,0xea,0x60, 0x0,0x0,0x3a,0x98,0x0,0x0,0x17,0x6f,0x92,0x5f,0xc5,0x46,0x0,0x0,0x1,0xe9, 0x50,0x4c,0x54,0x45,0xff,0xff,0xff,0x0,0x0,0x0,0x0,0x91,0xe7,0x0,0x91,0xe7, 0xb,0x9d,0xe9,0x0,0x91,0xe7,0x0,0x6d,0xcf,0x0,0x69,0xcc,0x0,0x3d,0xad,0x0, 0x23,0x99,0x0,0x91,0xe7,0x0,0x8b,0xe3,0x0,0x53,0xbd,0x0,0x5,0x82,0x0,0x91, 0xe7,0x16,0xa4,0xec,0x0,0x0,0x7d,0x0,0x0,0x7d,0x0,0x86,0xe0,0x0,0x0,0x7d, 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