slot

Inside the constructor, there is a connection: connect(&amskspace::on_board_computer_model::self(), SIGNAL(camera_status_changed(const amskspace::camera_status_t&)), this, SLOT(set_camera_status(const amskspace::camera_status_t&))); And the method: void camera_model:: set_camera_status(const amskspace::camera_status_t& status) { disconnect(&amskspace::on_board_computer_model::self(), SIGNAL(camera_status_changed(const amskspace::camera_status_t&)), this, SLOT(set_camera_status(const amskspace::camera_status_t&))); // do the job } And I'd like to disconnect this slot after the first call. The

Is it only me who have the problem with extracting coordinates of a polygon from SpatialPolygonsDataFrame object? I am able to extract other slots of the object ( ID , plotOrder ) but not coordinates ( coords ). I don't know what I am doing wrong. Please find below my R session where bdryData being the SpatialPolygonsDataFrame object with two polygons. > bdryData An object of class "SpatialPolygonsDataFrame" Slot "data": ID GRIDCODE 0 1 0 1 2 0 Slot "polygons": [[1]] An object of class "Polygons" Slot "Polygons": [[1]] An object of class "Polygon" Slot "labpt": [1] 415499.1 432781.7 Slot "area

My original code passed a QStringList from the signal to the slot and then returned a QList. Everything worked fine but I needed to change both the QStringList and QList into 2 different subclassed QObjects. Since then I have been receiving errors like "synthesized method first required here" or it simply crashes without any error message. I understand that qt copies all arguments passed in a queued connection and a qobject cannot be copied. So instead of returning a qobject I thought I would create both qobjects prior to emitting the signal. Then I would pass references to each object, modify

There are many slot examples but no clair and simple as I need... I need something like var x="Hello"; $slot = x; that is what I need... In a concrete example: https://jsfiddle.net/2qdh3x3v/ I need a easy way to set slot header to "HELLO" when click "ShowModal1", and to "BYE!" when click "ShowModal2". You can create a variable and change it by clicking on the desired button: <button id="show-modal" @click="(header = 'HELLO') && (showModal = true)"> Show Modal1 </button> <button id="show-modal" @click="(header = 'BYE!') && (showModal = true)"> Show Modal2 </button> ... <h3 slot="header">{

i have a doubt in QT c++ Suppose this is the main.cpp #include "head.h" #include "tail.h" int main() { head *head_obj = new head(); tail *tail_obj = new tail(); //some code } here is the head.h class head:public QWidget { Q_OBJECT /* some code */ public slots: void change_number(); }; here is the tail.h class tail:public QWidget { Q_OBJECT /* some code */ /* some code */ QPushButton *mytailbutton = new QPushButton("clickme"); //this is where i need help connect(button,SIGNAL(clicked()),?,?); }; Now how do i connect the mytailbutton's signal clicked() to head class slot change_number? i just

After my post here : Associate signal and slot to a qcheckbox create dynamically I need to associate : • The signal clicked() when I click on a qCheckBox to my function cliqueCheckBox(QTableWidget *monTab, int ligne, QCheckBox *pCheckBox) To do so, I have to use QSignalMapper , after two hours of trying to understand how it works, I can't have a good result, here's the code I make, this is obviously wrong : QSignalMapper *m_sigmapper = new QSignalMapper(this); QObject::connect(pCheckBox, SIGNAL(mapped(QTableWidget*,int, QCheckBox*)), pCheckBox, SIGNAL(clicked())); QObject::connect(this, SIGNAL