Blast from the past - KDE 3.5

[GreyGeek]

UI files.. my main issue comes from the fact they can have their own connections and don't get me started on finding a "on_objectName_signal" methods within a class. (those made from clicking "goto slot" in designer)

Qt4+ is a real joy to code with.

Ah, signals and slots!!! The most powerful "callback" feature in the Qt API. I loved them! Here is some S&S code from my Homestead app, which was written in 2004 using Qt4 and maintained until 2020, when it was replaced with a web based app, but long after I retired in 2008. I used S&S technology extensively. I also liked that you can turn them on and off at will, using disconnect(), for special purposes during processing.

// Initialize the signal and slot connections
// ui.btn... prefix buttons, ui.le... prefix line edit text boxes, ui.cbo... prefix combo boxes
// ui.tab... prefix tabs, ui.grid... prefix grids
// Buttons actions (SIGNALs) are connected to specific functions (SLOTs).
connect(ui.btnSearch, SIGNAL(clicked()), this, SLOT(searchAll()));
connect(ui.btnQUIT, SIGNAL(clicked()), this, SLOT(QuitClicked()));
connect(ui.btnEditProperty, SIGNAL(clicked()), this, SLOT(editProperty()));
connect(ui.btnUndoProperty, SIGNAL(clicked()), this, SLOT(undoProperty()));
connect(ui.btnNewProperty, SIGNAL(clicked()), this, SLOT(newProperty()));
connect(ui.btnDeleteProperty, SIGNAL(clicked()), this, SLOT(deleteProperty()));
connect(ui.btnSWAP, SIGNAL(clicked()), this, SLOT(persinfoSwap()));
connect(ui.btnEditPersInfo, SIGNAL(clicked()), this, SLOT(editPersInfo()));
connect(ui.btnSearchHistory, SIGNAL(clicked()), this, SLOT(SearchHistory()));
connect(ui.btnUndoPersInfo, SIGNAL(clicked()), this, SLOT(UndoPersInfo()));
connect(ui.btnNewIncome, SIGNAL(clicked()), this, SLOT(NewIncome()));
connect(ui.btnDeleteIncome, SIGNAL(clicked()), this, SLOT(DeleteIncome()));
connect(ui.btnVNI, SIGNAL(clicked()), this, SLOT(toggleVNI()));
connect(ui.btnReject, SIGNAL(clicked()), this, SLOT(toggleReject()));
connect(ui.btnCalcAllProperty, SIGNAL(clicked()), this, SLOT(CalcAllProperties()));
connect(ui.btnCalcPctExm, SIGNAL(clicked()), this, SLOT(calcThisProperty()));
connect(ui.btnDateBtchRpt, SIGNAL(clicked()), this, SLOT(printDateBtchRpt()));
connect(ui.btnBatchBatchRpt, SIGNAL(clicked()), this, SLOT(printBatchBatchRpt()));
connect(ui.btnXTabAllCnty, SIGNAL(clicked()), this, SLOT(GenerateXTabAllCounties()));
connect(ui.btnXTabEachCnty, SIGNAL(clicked()), this, SLOT(GenerateXTabEachCounty()));
connect(ui.btnMakeN458, SIGNAL(clicked()), this, SLOT(generateN458files()));
connect(ui.btnLabelsAddrByCounty, SIGNAL(clicked()), this, SLOT(labelsAddrBycounty()));
connect(ui.btnAorDRoster, SIGNAL(clicked()), this, SLOT(AorDRoster()));
connect(ui.btnMakeLetterR, SIGNAL(clicked()), this, SLOT(MakeLetterR()));
connect(ui.btnMakeLetterD, SIGNAL(clicked()), this, SLOT(MakeLetterD()));
connect(ui.btnPrintQ, SIGNAL(clicked()), this, SLOT(printQEditsQuery()));
connect(ui.btnShortRpt, SIGNAL(clicked()), this, SLOT(shortRpt()));
connect(ui.btnLongRpt, SIGNAL(clicked()), this, SLOT(longRpt()));

// line edit signals on lost focus, allowing edit checks and cursor flow control
connect(ui.leHEC, SIGNAL(lostFocus()), this, SLOT(toggleServiceDates()));
connect(ui.leSSSN, SIGNAL(lostFocus()), this, SLOT(toggleSYOB()));
connect(ui.leBDate, SIGNAL(lostFocus()), this, SLOT(BDateLostFocus()));
connect(ui.leLine8f, SIGNAL(lostFocus()), this, SLOT(leLine8fLostFocus()));
connect(ui.leParcelID, SIGNAL(lostFocus()), this, SLOT(leParcelIDfLostFocus()));
connect(ui.leTaxDistrict, SIGNAL(lostFocus()), this, SLOT(leTaxDistrictfLostFocus()));
connect(ui.lePart, SIGNAL(lostFocus()), this, SLOT(partLostFocusAction()));

// combo box signals allows access to the newly selected row of the combo box
connect(ui.cboCountyName, SIGNAL(currentIndexChanged(int)), this, SLOT(passCntyNum( int )));
connect(ui.cboMS, SIGNAL(currentIndexChanged(int)), this, SLOT(passMsNum( int )));
connect(ui.cboAppType, SIGNAL(currentIndexChanged(int)), this, SLOT(passApptype( int )));

// tab signals Detects the change in the selected Tab of the UI and displays the new tab.
connect(ui.tabHomestead, SIGNAL(currentChanged(int)), this, SLOT(setCurrentTab(int)));

// grid signals "Index" allows access to the specific row and column clicked
connect(ui.gridPersInfo, SIGNAL(clicked(QModelIndex)), this, SLOT(displaySelectedPersInfo( QModelIndex )));
connect(ui.gridMultiProp, SIGNAL(clicked(QModelIndex)), this, SLOT(displaySelectedMultiProp( QModelIndex )));