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emacs projects -*- mode: org; -*-

qt 的 qobject组织形式

QObjects以对象树组织它们自己。当你创建一个QObject以另一个对象作为其父对象时，这个QObject被加入到其父对象 >的children()列表中，当父对象对被删除时，其子对象也会被删除。实践表明这种组织方式非常适合GUI对象的特点与需要。举例 >来说，一个QShortcut(键盘快捷键)是其相关窗口的孩子，因此当用户关掉那个窗口时，这个快捷键也随之删除了。 > >你也可以亲自删除孩子对象，这些子对象会与其父对象脱离关系。举例来说，当用移除了一个工具栏，它导致应用程序删除这个QToolBa >r 对象，这时这个工具栏的父对象QMainWindow察觉到了变化，会相应地重新配置其屏幕空间。 > > >Best Regards! > >Peng Li (李鹏) > > > >—–Original Message—– >From: Kallunki Janne >Sent: Friday, August 21, 2009 2:21 PM > >Cc: Li Peng > > >Hi, > >I dont’t think all the new deletes are needed. QObjects >automatically delete their children. For example: > >QMyWidget::QMyWidget(…):QMainWindow(…) >{ > QPushButton * button=new QPushButton(this); // QMainWindow >added as a parent > connect(…); >} > > >QMyWidget::QMyWidget(…):QMainWindow(…) >{ > button=new QPushButton(this); > connect(…); >} >QMyWidget::~QMyWidget() >{ > // No need to delete button because it’s deleted >automatically when QMyWidget is deleted. >} > >I found that following objects are just like the example above: >m_faviconArea = new QLabel(this); >m_entryProgressFrame = new QFrame(this); >m_button = new QPushButton(*m_loadIcon, tr(“”), this); >m_focusTimer = new QTimer(this); >m_gotoEntryLayout = new QStackedLayout(m_entryProgressFrame); > >Could you re-check your fix and avoid deletion of objects that >are taken care of framework. Check other deletions too, not >only the five mentioned above. > > >Br, Janne >

qt widget创建另外一个widget

比如下例： class MainWindow:public QMainWindow { } void MainWindow::createDockWindows() {

QDockWidget *wdock = new QDockWidget(tr(“A.LVS”), this); textEdit = new QTextEdit(this); subWinR *swr1=new subWinR(textEdit); wdock->setWidget(swr1); addDockWidget(Qt::RightDockWidgetArea,wdock);

} ##这里textEdit widget被嵌入wdock中，如果没有这句，那么textEdit也将出现在屏幕上

void MainWindow::createDockWindows() {

textEdit = new QTextEdit(this);

} 这样textEdit会出现在屏幕上，因为有this指针传入，如果是 textEdit = new QTextEdit(); ##则 textEdit不会出现在屏幕上。

QMainWindow的CentralArea

QMainWindow::QMainWindow() { createGUI(); ## 生成一个layout以及layout里的所有组建 QWidget * wg= new QWidget(this); wg->setLayout(layout); ## 把QWidget的layout设置成生成好的layout setCentralWidget(wg); #在QMainWindow中把 CentralWidget设置成wg } 如果这里直接用setLayout函数，会使设置失败，因为QMainWindow一级那个set好layout了。 自己只能重新设置CentralWidget的layout

qt 的信号，槽机制

qt的slot and signal 提供了一套 qobject 对象之间的通信机制。signal是sneder，slot是 receiver的。但是qt的signal实际上是一个函数，qt所有关于信号和槽之间的联系，是通过生成 moc_**.cpp 文件实现的。 moc文件的生成需要在class 的声明第一行上Q_OBJECT 表示这个类 是个qobject的子类，如果有connect机制，qmake会生成相应的makefile指明生成moc文件。

。

在用connect连接signal和slot的时候，如果有函数参数，不许要参数名。

MyWin::MyWin(QWidget * parent):QMainWindow(parent) { mybut = new QPushButton(this); connect(mybut, SIGNAL(clicked()),this, SLOT(bu_click())); connect(this, SIGNAL(emittest(int)),this, SLOT(test(int))); }

MyWin::~MyWin() { }

void MyWin::bu_click() { qDebug()<< “this is a test clicked”; emit emittest(5); }

int MyWin::test(int num) { qDebug()<< “this is a test clicked return and parameter”<< num;

}

slot 既然是类的成员函数有没有public之分呢？没有。

slot和signal都是函数它们之间的参数的对应关系是怎样的。

这两个问题要看moc文件得到解答 ****———————— /****************************************************************************

Meta object code from reading C++ file ‘MyWin.h’

**

Created: Thu Oct 27 15:51:02 2011

by: The Qt Meta Object Compiler version 62 (Qt 4.7.2)

**

WARNING! All changes made in this file will be lost!

*****************************************************************************/

#include “MyWin.h” #if !defined(Q_MOC_OUTPUT_REVISION) #error “The header file ‘MyWin.h’ doesn’t include <QObject>.” #elif Q_MOC_OUTPUT_REVISION != 62 #error “This file was generated using the moc from 4.7.2. It” #error “cannot be used with the include files from this version of Qt.” #error “(The moc has changed too much.)” #endif

QT_BEGIN_MOC_NAMESPACE static const uint qt_meta_data_MyWin[] = {

// content: 5, // revision 0, // classname 0, 0, // classinfo 3, 14, // methods 0, 0, // properties 0, 0, // enums/sets 0, 0, // constructors 0, // flags 1, // signalCount

// signals: signature, parameters, type, tag, flags 15, 11, 7, 6, 0x05,

// slots: signature, parameters, type, tag, flags 29, 6, 6, 6, 0x0a, 40, 11, 7, 6, 0x08,

0 // eod };

static const char qt_meta_stringdata_MyWin[] = { “MyWin\0\0int\0num\0emittest(int)\0bu_click()\0” “test(int)\0” };

const QMetaObject MyWin::staticMetaObject = { { &QMainWindow::staticMetaObject, qt_meta_stringdata_MyWin, qt_meta_data_MyWin, 0 } };

#ifdef Q_NO_DATA_RELOCATION const QMetaObject &MyWin::getStaticMetaObject() { return staticMetaObject; } #endif //Q_NO_DATA_RELOCATION

const QMetaObject *MyWin::metaObject() const { return QObject::d_ptr->metaObject ? QObject::d_ptr->metaObject : &staticMetaObject; }

void *MyWin::qt_metacast(const char *_clname) { if (!_clname) return 0; if (!strcmp(_clname, qt_meta_stringdata_MyWin)) return static_cast<void*>(const_cast< MyWin*>(this)); return QMainWindow::qt_metacast(_clname); }

int MyWin::qt_metacall(QMetaObject::Call _c, int _id, void **_a) { _id = QMainWindow::qt_metacall(_c, _id, _a); if (_id < 0) return _id; if (_c == QMetaObject::InvokeMetaMethod) { switch (_id) { case 0: { int _r = emittest((reinterpret_cast< int()>(_a[1]))); if (_a[0]) *reinterpret_cast< int*>(_a[0]) = _r; } break; case 1: bu_click(); break; case 2: { int _r = test((reinterpret_cast< int()>(_a[1]))); 3~ if (_a[0]) *reinterpret_cast< int*>(_a[0]) = _r; } break; default: ; } _id -= 3; } return _id; }

// SIGNAL 0 int MyWin::emittest(int _t1) { int _t0; void *_a[] = { const_cast<void*>(reinterpret_cast<const void*>(&_t0)), const_cast<void*>(reinterpret_cast<const void*>(&_t1)) }; QMetaObject::activate(this, &staticMetaObject, 0, _a); return _t0; } QT_END_MOC_NAMESPACE *****————————————————- SIGNAL 的函数实现是在moc里的：signal是把参数传递给qt_meta_call,这时对应id，数组a[0]作为函数返回值输出 ，a[1]开始作为函数参数输入，所以，slot的参数一定要少于signal的参数，因为最终以函数方式调用的是slot函数。 而如果slot函数有参数的话，是一定那个要传入参数才能调用成功的，但signal的参数可以有多个，slot函数不一定都要用。 signal 函数不一定都要 Qt extends the syntax of C++ with the extra keywords “slots”, “signals”, and “more”. These are used together with the standard keywords “public”, “protected”, and “private”.

qt 中调用其他程序

在qt中调用其他程序佣 QProcess，但是调用之后会无法控制这个进程。无论是execute还是start， 在linux可以佣 system(“kill `ps aux|grep firefox| awk ‘{print $2}’ `”);杀死该进程，比较暴力，不建议。

qt程序置顶：QWidget *parent = 0, Qt::WindowFlags f=Qt::WindowStaysOnTopHint

qt 源代码的取得，用git

qt 源代码的编译

linux下，从configure开始

configure有很多选项 ./configure -static -xplatform unsupported/qws/qnx-armv7-g++ -embedded armv7 -no-gfx-linuxfb -no-mouse-linuxtp -no-kbd-tty -no-qt3support -qt-gfx-qnx -qt-mouse-qnx -qt-kbd-qnx -no-exceptions -no-webkit ## 这是一个编译arm cpu上qnx OS上的qt库。 ## -no 表示不编译相应的模块 ## -static 表示静态库 ## unsupported/qws/qnx-armv7-g++ 这个是一个路径名，里面是交叉编译所需要的所有信息 ## -embedded 表示嵌入式 后根 cpu的型号

## –help是一个寻求帮助的地方，默认不加参数的情况下是-no-opengl,如果需要opengl的支持，应该用-opengl选项 li@ubuntu:/home/lily/qtwork/qt$ ./configure –help |grep -n -A 3 -B 3 opengl 175- operating systems and compilers. 176- -graphicssystem <sys> Sets an alternate graphics system. Available options are: 177- raster - Software rasterizer 178: opengl - Rendering via OpenGL, Experimental! 179- openvg - Rendering via OpenVG, Experimental! 180- 181- – 303- GLX, which is the default. Note: For OpenGL ES, EGL 304- is always used. 305- 306: -no-opengl ……… Do not support OpenGL. 307: + -opengl <api> …… Enable OpenGL support. 308- With no parameter, this will auto-detect the “best” 309- OpenGL API to use. If desktop OpenGL is available, it 310-

qt程序运行指定路径

ldd:FATAL: Could not load library libQtGui.so.4

ldd:FATAL: Could not load library libQtNetwork.so.4 ## 这是找不到qt的library， 需要增加LD——LIBRARY——PATH

ldd:FATAL: Could not load library libstdc++.so.6 ## 在相应目录下无法找到libstdc++，这在交叉编译环境下有，在安装qnx的sdk的目录下。

li@ubuntu:/opt/qnx650/target/qnx6/armle-v7/lib$ ls crt1.o libc.so libm.so libsnmp.so crtbegin.o libc.so.3 libm.so.2 libsnmp.so.1 crtend.o libecpp-ne.so.4 libmudflap.so.0 libsocket.a crti.o libecpp.so.4 libmudflap.so.0.0.0 libsocketS.a crtn.o libetfs.a libmudflapth.so.0 libsocket.so dll libfont.a libmudflapth.so.0.0.0 libsocket.so.3 gcc libfontS.a libnbdrvr.a libstdc++.so.6 libasound.so libfont.so libnbdrvrS.a libstdc++.so.6.0.13 libasound.so.2 libfont.so.1 libpm.a libusbdi.a libbessel.a libhiddi.a libpmS.a libusbdiS.a libbessel.so libhiddi.so libpps.a libusbdi.so libbessel.so.1 libhiddi.so.1 libppsS.a libusbdi.so.2 libc.a libimg.a libpps.so libwlconfig.a libcam.so libimgS.a libpps.so.1 libwlconfigS.a libcam.so.2 libimg.so libqnxterm.a libwlconfig.so libcpp-ne.so.4 libimg.so.1 libshutdown.a libwlconfig.so.1 libcpp.so.4 libm.a libsnmp.a mcrt1.o libcS.a libmS.a libsnmpS.a nto.link li@ubuntu:/opt/qnx650/target/qnx6/armle-v7/lib$

Cannot create Qt for Embedded Linux data directory: /qtembedded-0 Abort

bsp的/目录无法写，因为不是从磁盘mount上的，

/dev/ram0 on /qtembedded-0 type qnx4 /dev/hd0t131 on /mnt type dos (fat32) /dev/hd0t12 on /fs/hd0 type dos (fat32) ### 这里hd0是sd卡，但根目录始终不在sd卡上 可以mount一个ram到根目录下的一个目录下

he=0,vnode=256

QFontDatabase: Cannot find font directory /usr/local/Trolltech/QtEmbedded-4.8.0- arm/lib/fonts - is Qt installed correctly? Abort

qt多语言支持

Qt多语言支持版 ==================================================== 1)在程序里需要翻译的地方用tr()包装起来，如 QString str = tr(“baidu”); 2)在.pro文件里加入一行 TRANSLATIONS=Language_Chn.ts 3)用控制台执行命令：lupdate yourapp.pro 或调用ide编译.这样程序会将程序中使用tr的部分提取到ts文件中。 4)打开 linguist 工具，编辑上面的ts文件，将每个源字符进行翻译，然后release一个Language_Chn.qm文件。 5）在程序里调用下面代码即可完成界面语言的翻译：

QTranslator * translator = new QTranslator(); translator->load(“Language_Chn”); QApplication::instance()->installTranslator(translator);

translator->load(“Language_”+ QLocale::system().name()))// 根据系统所选的语言加载相应的语言。cn,为中文， en，为英文 ==========================================================

[cpp] view plaincopyprint? 01.//tqt.h 02.#ifndef TQT_H_ 03.#define TQT_H_

05.#include <QtGui> 06.#include <QtCore>

08.//QT动态加载（运行时改变）语言的例子 09.class Dialog : public QDialog 10.{

  1. Q_OBJECT

12.private:

  1. QLabel *textLabel;
  2. QLabel *languageLabel;
  3. QComboBox *comboBox;
  4. QMap<QString, QString> translatorMap;
  5. QTranslator translator;
  6. //由翻译文件的文件名得到语言的名字
  7. QString LanguageName(const QString &name);

21.public:

  1. Dialog(QDialog *parent = 0);
  2. ~Dialog();
  3. void SetLanguageCombo();
  4. //改变语言
  5. void ChangeLanguage(const QString &language);
  6. //语言加载完成名刷新界面
  7. void Reflush();
  9. public slots:
  10. void ChooseLanguage(const QString &language);

32.};

34.#endif

38.//tqt.cpp 39.#include “tqt.h”

41.Dialog::Dialog(QDialog parent / = 0 */) 42.{

  1. setWindowTitle( tr(“English”) );
  2. resize(200, 200);
  4. textLabel = new QLabel(tr(“I am Chinese”), this);
  5. languageLabel = new QLabel(tr(“Language:”), this);
  6. comboBox = new QComboBox(this);
  7. QHBoxLayout *subLayout = new QHBoxLayout;
  8. subLayout->addWidget(languageLabel);
  9. subLayout->addWidget(comboBox);
  10. QVBoxLayout *layout = new QVBoxLayout;
  11. layout->addWidget(textLabel);
  12. layout->addLayout(subLayout);
  13. setLayout(layout);
  14. SetLanguageCombo();
  15. connect(comboBox, SIGNAL(activated(const QString&)),
  16. this, SLOT(ChooseLanguage(const QString&)));

59.}

61.Dialog::~Dialog() 62.{

64.}

66.QString Dialog::LanguageName(const QString &name) 67.{

  1. QTranslator translator;
  2. translator.load(name);
  3. QString str = translator.translate(“Dialog”, “English”);
  4. return str;

72.}

74.void Dialog::SetLanguageCombo() 75.{

  1. comboBox->addItem(“English”);
  2. //所有语言包(*.qm)都放在”language”这个文件夹下
  3. QDir dir(“language”);
  4. QStringList fileNames = dir.entryList(QStringList(“*.qm”),
  5. QDir::Files, QDir::Name);
  6. QString name;
  8. QStringList::iterator iter = fileNames.begin();
  9. for(; iter!=fileNames.end(); ++iter)
  10. {
  12. *iter = dir.filePath(*iter);
  13. name = *iter;
  14. name = LanguageName(*iter);
  15. translatorMap.insert(name, *iter);
  16. comboBox->addItem(name);
  17. }

93.}

95.void Dialog::ChooseLanguage(const QString &language) 96.{

  1. int index = comboBox->currentIndex();
  2. ChangeLanguage(language);

99.}

101.void Dialog::ChangeLanguage(const QString &language) 102.{

  1. if(“English” == language)
  2. qApp->removeTranslator(&translator);
  3. else
  4. {
  5. QString fileName = translatorMap.value(language);
  6. translator.load(fileName);
  7. qApp->installTranslator(&translator);
  8. }
  9. Reflush();

112.}

114.void Dialog::Reflush() 115.{

  1. setWindowTitle( tr(“English”) );
  2. textLabel->setText( tr(“I am Chinese”) );
  3. languageLabel->setText( tr(“Language:”) );

119.}

123.//main.cpp 124.#include “tqt.h”

126.int main(int argc, char **argv) 127.{

  1. QApplication app(argc, argv);
  2. Dialog *dialog = new Dialog;
  3. dialog->show();
  4. return app.exec();

132.} //tqt.h #ifndef TQT_H_ #define TQT_H_

#include <QtGui> #include <QtCore>

//QT动态加载（运行时改变）语言的例子 class Dialog : public QDialog { Q_OBJECT private: QLabel *textLabel; QLabel *languageLabel; QComboBox *comboBox; QMap<QString, QString> translatorMap; QTranslator translator; //由翻译文件的文件名得到语言的名字 QString LanguageName(const QString &name);

public: Dialog(QDialog *parent = 0); ~Dialog(); void SetLanguageCombo(); //改变语言 void ChangeLanguage(const QString &language); //语言加载完成名刷新界面 void Reflush();

public slots: void ChooseLanguage(const QString &language); };

#endif

//tqt.cpp #include “tqt.h”

Dialog::Dialog(QDialog parent / = 0 */) { setWindowTitle( tr(“English”) ); resize(200, 200);

textLabel = new QLabel(tr(“I am Chinese”), this); languageLabel = new QLabel(tr(“Language:”), this); comboBox = new QComboBox(this); QHBoxLayout *subLayout = new QHBoxLayout; subLayout->addWidget(languageLabel); subLayout->addWidget(comboBox); QVBoxLayout *layout = new QVBoxLayout; layout->addWidget(textLabel); layout->addLayout(subLayout); setLayout(layout); SetLanguageCombo(); connect(comboBox, SIGNAL(activated(const QString&)), this, SLOT(ChooseLanguage(const QString&))); }

Dialog::~Dialog() {

}

QString Dialog::LanguageName(const QString &name) { QTranslator translator; translator.load(name); QString str = translator.translate(“Dialog”, “English”); return str; }

void Dialog::SetLanguageCombo() { comboBox->addItem(“English”); //所有语言包(*.qm)都放在”language”这个文件夹下 QDir dir(“language”); QStringList fileNames = dir.entryList(QStringList(“*.qm”), QDir::Files, QDir::Name); QString name;

QStringList::iterator iter = fileNames.begin(); for(; iter!=fileNames.end(); ++iter) {

*iter = dir.filePath(*iter); name = *iter; name = LanguageName(*iter); translatorMap.insert(name, *iter); comboBox->addItem(name); } }

void Dialog::ChooseLanguage(const QString &language) { int index = comboBox->currentIndex(); ChangeLanguage(language); }

void Dialog::ChangeLanguage(const QString &language) { if(“English” == language) qApp->removeTranslator(&translator); else { QString fileName = translatorMap.value(language); translator.load(fileName); qApp->installTranslator(&translator); } Reflush(); }

void Dialog::Reflush() { setWindowTitle( tr(“English”) ); textLabel->setText( tr(“I am Chinese”) ); languageLabel->setText( tr(“Language:”) ); }

//main.cpp #include “tqt.h”

int main(int argc, char **argv) { QApplication app(argc, argv); Dialog *dialog = new Dialog; dialog->show(); return app.exec(); }

qt 无边框窗口

http://www.xycode.org/?p=138

QApplication::setStyle(“cleanlooks”); QApplication a(argc, argv); login w; w.setWindowTitle(“ClientLogin”); w.setWindowOpacity(1); w.setWindowFlags(Qt::FramelessWindowHint); w.setAttribute(Qt::WA_TranslucentBackground); w.show(); w.move(200,100); return a.exec(); } 关键的语句，就是其中的

w.setWindowOpacity(1);

w.setWindowFlags(Qt::FramelessWindowHint);

w.setAttribute(Qt::WA_TranslucentBackground);

这些语句，不知道什么意思就摁下F1，或者直接查阅帮助文档……

对窗体无边框的设置要写在main里面，这样所有派生的子窗口，QDialog,QWidget都可继承，

很好规划和管理，方便统一美化设计。

以工程中一个聊天窗口为例，先用PS制作一个窗体的背景图片，注意存为png格式，这是透明的关键。

不会使PS，可以找些PNG资源图片。

我的PNG透明背景图为：

DBus 编程

zxx@gll-bac:~$ dbus-send –system –print-reply –type=method_call –dest=”org.freedesktop.DBus” /org/freedesktop/DBus org.freedesktop.DBus.ListNames method return sender=org.freedesktop.DBus -> dest=:1.58 reply_serial=2 array [ string “org.freedesktop.DBus” string “:1.7” string “:1.8” string “:1.9” string “org.freedesktop.NetworkManager” string “org.freedesktop.ModemManager” string “com.ubuntu.Upstart” string “org.freedesktop.RealtimeKit1” string “:1.40” string “:1.41” string “:1.20” string “org.freedesktop.PolicyKit1” string “:1.42” string “:1.43” string “:1.44” string “:1.22” string “:1.45” string “:1.23” string “org.freedesktop.NetworkManagerSystemSettings” string “:1.24” string “:1.48” string “com.redhat.NewPrinterNotification” string “:1.49” string “fi.epitest.hostap.WPASupplicant” string “:1.28” string “:1.29” string “org.gnome.DisplayManager” string “org.freedesktop.ConsoleKit” string “org.freedesktop.UDisks” string “org.freedesktop.Hal” ============\ service –status-all

hal https://wiki.archlinux.org/index.php/HAL HAL (Hardware Abstraction Layer) is a daemon that allows desktop applications to readily access hardware information, to locate and use such hardware regardless of bus or device type. In this way a desktop GUI can present all resources to its user in a seamless and uniform manner. ================================== To debug for hald can’t start sudo /usr/sbin/hald –daemon=no –verbose=yes ps aux|grep hald zxx@gll-bac:~$ dbus-send –system –print-reply –type=method_call –dest=”org.freedesktop.DBus” /org/freedesktop/DBus org.freedesktop.DBus.ListNames see if “org.freedesktop.Hal” exist

dbus-send –system –print-reply –dest=org.freedesktop.Hal /org/freedesktop/Hal/Manager org.freedesktop.Hal.Manager.GetAllDevices

========================================== Get signal whne usb plug in zxx@gll-bac:~$ dbus-monitor –system

signal sender=:1.23 -> dest=(null destination) serial=35 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886” signal sender=:1.23 -> dest=(null destination) serial=36 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886_if1” signal sender=:1.23 -> dest=(null destination) serial=37 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886_if1_scsi_host” signal sender=:1.23 -> dest=(null destination) serial=38 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886_if0” signal sender=:1.23 -> dest=(null destination) serial=39 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886_if1_scsi_host_0” signal sender=:1.23 -> dest=(null destination) serial=40 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886_if1_scsi_host_0_scsi_device_lun0” signal sender=:1.23 -> dest=(null destination) serial=41 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/usb_device_fca_8004_34C31986DE0F9F53750E4B8E348982C775D8B886_if1_scsi_host_0_scsi_device_lun0_scsi_generic” signal sender=:1.42 -> dest=(null destination) serial=109 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceAdded object path “/org/freedesktop/UDisks/devices/sdc” signal sender=:1.42 -> dest=(null destination) serial=116 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceJobChanged object path “/org/freedesktop/UDisks/devices/sdc” boolean true string “FilesystemMount” uint32 1000 boolean false double -1 signal sender=:1.42 -> dest=(null destination) serial=117 path=/org/freedesktop/UDisks/devices/sdc; interface=org.freedesktop.UDisks.Device; member=JobChanged boolean true string “FilesystemMount” uint32 1000 boolean false double -1 signal sender=org.freedesktop.DBus -> dest=(null destination) serial=7 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged string “:1.311” string “” string “:1.311” signal sender=:1.23 -> dest=(null destination) serial=42 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/storage_serial_RIM_BlackBerry_SD_34C31986DE0F9F53750E4B8E348982C775D8B886_0_0” signal sender=:1.23 -> dest=(null destination) serial=43 path=/org/freedesktop/Hal/devices/storage_serial_RIM_BlackBerry_SD_34C31986DE0F9F53750E4B8E348982C775D8B886_0_0; interface=org.freedesktop.Hal.Device; member=PropertyModified int32 1 array [ struct { string “info.interfaces” boolean false boolean true } ] signal sender=:1.42 -> dest=(null destination) serial=118 path=/org/freedesktop/UDisks/devices/sdc; interface=org.freedesktop.UDisks.Device; member=Changed signal sender=:1.42 -> dest=(null destination) serial=119 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceChanged object path “/org/freedesktop/UDisks/devices/sdc” signal sender=:1.42 -> dest=(null destination) serial=125 path=/org/freedesktop/UDisks/devices/sdc; interface=org.freedesktop.UDisks.Device; member=Changed signal sender=:1.42 -> dest=(null destination) serial=126 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceChanged object path “/org/freedesktop/UDisks/devices/sdc” signal sender=:1.42 -> dest=(null destination) serial=128 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceJobChanged object path “/org/freedesktop/UDisks/devices/sdc” boolean false string “” uint32 0 boolean false double -1 signal sender=:1.42 -> dest=(null destination) serial=129 path=/org/freedesktop/UDisks/devices/sdc; interface=org.freedesktop.UDisks.Device; member=JobChanged boolean false string “” uint32 0 boolean false double -1 signal sender=:1.23 -> dest=(null destination) serial=44 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded string “/org/freedesktop/Hal/devices/volume_uuid_28C9_8252” signal sender=:1.42 -> dest=(null destination) serial=134 path=/org/freedesktop/UDisks/devices/sdc; interface=org.freedesktop.UDisks.Device; member=Changed signal sender=:1.42 -> dest=(null destination) serial=135 path=/org/freedesktop/UDisks; interface=org.freedesktop.UDisks; member=DeviceChanged object path “/org/freedesktop/UDisks/devices/sdc” ^C =========================================================== usb device inserted.

http://comments.gmane.org/gmane.comp.freedesktop.dbus/11389 How to send signals to dbus

zxx@gll-bac:~$ dbus-monitor –system >dbsme.txt & [1] 18044 zxx@gll-bac:~$ cat dbsme.txt signal sender=org.freedesktop.DBus -> dest=:1.317 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired string “:1.317” zxx@gll-bac:~$ cat dbsme.txt signal sender=org.freedesktop.DBus -> dest=:1.317 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired string “:1.317” signal sender=org.freedesktop.DBus -> dest=(null destination) serial=7 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged string “:1.318” string “” string “:1.318” signal sender=:1.318 -> dest=(null destination) serial=2 path=/org/freedesktop/Hal/Manager; interface=org.freedesktop.Hal.Manager; member=DeviceAdded signal sender=org.freedesktop.DBus -> dest=(null destination) serial=8 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged string “:1.318” string “:1.318” string “”

send a message manually: ============= zxx@gll-bac:~$ dbus-send –system –type=signal –dest=org.freedesktop.Hal /org/freedesktop/Hal/Manager org.freedesktop.Hal.Manager.DeviceAdded zxx@gll-bac:~$ dbus-send –system –type=signal /org/freedesktop/Hal/Manager org.freedesktop.Hal.Manager.DeviceAdded ====================================== a good book to introduce dbus, good tutorial https://idlebox.net/2011/apidocs/emacs-23.3.zip/dbus/dbus_toc.html#SEC_Contents

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http://blog.csdn.net/jackiewell/article/details/6425460

工具2：qdbus 该工具是基于Qt的一个命令行工具。用法如下

qdbus [–system] [–literal] [servicename] [path] [method] [args]

servicename the service to connect to (e.g., org.freedesktop.DBus) path the path to the object (e.g., /) method the method to call, with or without the interface args arguments to pass to the call

有两个参数

–system 连接到system-bus(dbus有两种bus,一种是session-bus,一种是system-bus,不加参数默认连接到session-bus.) –literal 打印原始返回信息

如果qdbus命令不带任何参数，将会列出在dbus上所有的service.

• 假如参数里只有service的名字，那么qdbus会列出所有的对象路径.

如果qdbus命令给出了service的名字和对应的对象路径,则该路径上的方法,信号和可用的属性都会被列出来．

qdbus 用法举例 列出session bus的所有service

$ qdbus

列出system bus的所有service

$ qdbus –system

列出com.nokia.meego-im-uiserver service上所有路径

$ qdbus com.nokia.meego-im-uiserver

列出com.nokia.meego-im-uiserver service上某一路径里可用的方法

$ qdbus com.nokia.meego-im-uiserver /org/maemo/duiinputmethodserver1

调用指定service,指定路径上的某个方法。

$ qdbus com.nokia.meego-im-uiserver /org/maemo/duiinputmethodserver1 org.maemo.duiinputmethodserver1.showInputMethod

///examples: zxx@gll-bac:~$ sudo qdbus –system org.freedesktop.Hal / /org /org/freedesktop /org/freedesktop/Hal /org/freedesktop/Hal/Manager /org/freedesktop/Hal/devices /org/freedesktop/Hal/devices/computer /org/freedesktop/Hal/devices/volume_uuid_c19af616_a261_4649_96ea_6cc0de79e792 …

sudo qdbus –system org.freedesktop.Hal /org/freedesktop/Hal/Manager method QString org.freedesktop.DBus.Introspectable.Introspect() method void org.freedesktop.Hal.Manager.AcquireGlobalInterfaceLock(QString interface_name, bool exclusive) method void org.freedesktop.Hal.Manager.CommitToGdl(QString temporary_udi, QString global_udi) signal void org.freedesktop.Hal.Manager.DeviceAdded(QString udi) method bool org.freedesktop.Hal.Manager.DeviceExists(QString udi) signal void org.freedesktop.Hal.Manager.DeviceRemoved(QString udi) method QStringList org.freedesktop.Hal.Manager.FindDeviceByCapability(QString capability) method QStringList org.freedesktop.Hal.Manager.FindDeviceStringMatch(QString key, QString value)

zxx@gll-bac:~$ sudo qdbus –system org.freedesktop.Hal /org/freedesktop/Hal/Manager org.freedesktop.Hal.Manager.GetAllDevices /org/freedesktop/Hal/devices/computer /org/freedesktop/Hal/devices/volume_uuid_c19af616_a261_4649_96ea_6cc0de79e792 /org/freedesktop/Hal/devices/volume_part2_size_1024 /org/freedesktop/Hal/devices/volume_uuid_dba1edf3_398d_4979_aa00_4edcfe318bb0 /org/freedesktop/Hal/devices/storage_model_VMware_Virtual_S /org/freedesktop/Hal/devices/storage_model_DVD__RW_DH_16A6S …..