This document describes a simple notepad application developed using the RingQt GUI library. The application contains features like opening, saving, printing files as well as cut, copy, paste functionality. It allows changing font, text color and includes a find/replace feature. The main window contains toolbars for file operations and menus for file, edit, view and help. A text editor widget is used to display and edit text. Buttons are added to toolbars to trigger common operations like new, open, save etc.
In software engineering, the right architecture is essential for robust, scalable platforms. Wix has undergone a pivotal shift from event sourcing to a CRUD-based model for its microservices. This talk will chart the course of this pivotal journey.
Event sourcing, which records state changes as immutable events, provided robust auditing and "time travel" debugging for Wix Stores' microservices. Despite its benefits, the complexity it introduced in state management slowed development. Wix responded by adopting a simpler, unified CRUD model. This talk will explore the challenges of event sourcing and the advantages of Wix's new "CRUD on steroids" approach, which streamlines API integration and domain event management while preserving data integrity and system resilience.
Participants will gain valuable insights into Wix's strategies for ensuring atomicity in database updates and event production, as well as caching, materialization, and performance optimization techniques within a distributed system.
Join us to discover how Wix has mastered the art of balancing simplicity and extensibility, and learn how the re-adoption of the modest CRUD has turbocharged their development velocity, resilience, and scalability in a high-growth environment.
May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
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Enterprise Resource Planning System includes various modules that reduce any business's workload. Additionally, it organizes the workflows, which drives towards enhancing productivity. Here are a detailed explanation of the ERP modules. Going through the points will help you understand how the software is changing the work dynamics.
To know more details here: https://blogs.nyggs.com/nyggs/enterprise-resource-planning-erp-system-modules/
Large Language Models and the End of ProgrammingMatt Welsh
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Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
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Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Code reviews are vital for ensuring good code quality. They serve as one of our last lines of defense against bugs and subpar code reaching production.
Yet, they often turn into annoying tasks riddled with frustration, hostility, unclear feedback and lack of standards. How can we improve this crucial process?
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If you want to watch the on-demand webinar, please click here: https://www.xfilespro.com/webinars/salesforce-document-management-2-0-smarter-faster-better/
OpenFOAM solver for Helmholtz equation, helmholtzFoam / helmholtzBubbleFoamtakuyayamamoto1800
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The Ring programming language version 1.9 book - Part 78 of 210
1. Ring Documentation, Release 1.9
}
func connect
cOutput = "Connect to host 127.0.0.1 port 9999" + nl
lineedit1.settext(cOutput)
oTcpSocket = new qTcpSocket(win1) {
setconnectedevent("oClient.pConnected()")
setreadyreadevent("oClient.pRead()")
connecttohost("127.0.0.1",9999,3,0)
waitforconnected(5000)
}
func pConnected
cOutput += "Connected!" + nl
lineedit1.settext(cOutput)
func pRead
cOutput += "Ready Read!" + nl
lineedit1.settext(cOutput)
cOutput += oTcpSocket.readall().data() + nl
lineedit1.settext(cOutput)
Class Server
win1 lineedit1
oTcpServer oTcpClient
cOutput = ""
func server
win1 = new qwidget()
lineedit1 = new qtextedit(win1) {
setGeometry(150,50,200,300)
}
win1 {
setwindowtitle("Server")
setgeometry(450,100,400,400)
show()
}
oTcpServer = new qTcpServer(win1) {
setNewConnectionEvent("oServer.pNewConnection()")
oHostAddress = new qHostAddress()
oHostAddress.SetAddress("127.0.0.1")
listen(oHostAddress,9999)
}
cOutput = "Server Started" + nl +
"listen to port 9999" + nl
lineedit1.settext(cOutput)
Func pNewConnection
oTcpClient = oTcpServer.nextPendingConnection()
64.53. Simple Client and Server Example 739
2. Ring Documentation, Release 1.9
cOutput += "Accept Connection" + nl
lineedit1.settext(cOutput)
oTcpClient {
cStr ="Hello from server to client!"+char(13)+char(10)
write(cStr,len(cStr))
flush()
waitforbyteswritten(300000)
close()
}
The application during the runtime
64.54 Dynamic Objects
We may create objects in the runtime and add them to windows.
Example:
load "guilib.ring"
oFormDesigner = new FormDesigner { start("oFormDesigner") }
Class FormDesigner
winToolBox winForm
aObjects = []
func start cObjectName
oApp = new qApp
winToolBox = new qWidget()
winToolBox.setWindowTitle("ToolBox")
64.54. Dynamic Objects 740
3. Ring Documentation, Release 1.9
winToolBox.move(10,10)
winToolBox.resize(300,600)
btn = new qPushButton(winToolBox)
btn.resize(300,30)
btn.setText("Create Button")
btn.setClickEvent(cObjectName+".pCreateButton()")
btn.show()
winToolBox.show()
winForm = new qWidget() {
move(400,50)
setWindowTitle("Form Designer")
resize(600,600)
show()
}
oApp.exec()
func pCreateButton
nCount = len(aObjects)
aObjects + new MyButton(winForm)
{
nIndex = nCount + 1
setText("Button"+ nIndex)
Move(30*nIndex,30*nIndex)
resize(100,30)
show()
}
Class MyButton from qPushButton
nIndex = 0
64.55 Weight History Application
The next sample help in recording (Date, Time and Weight).
Load "guilib.ring"
MyApp = new qApp
{
$ApplicationObject = "oApp" # To be used when calling events
oApp = new App
exec()
oApp.CloseDatabase()
}
class App
cDir = currentdir() + "/"
oCon
64.55. Weight History Application 741
4. Ring Documentation, Release 1.9
aIDs = []
win1 = new qWidget()
{
setWindowTitle("Weight History")
resize(600,600)
layoutButtons = new qhboxlayout()
{
label1 = new qLabel(win1) { setText("Weight") }
text1 = new qlineedit(win1)
btnAdd = new qpushbutton(win1) {
setText("Add")
setClickEvent($ApplicationObject+".AddWeight()")
}
btnDelete = new qpushbutton(win1) {
setText("Delete")
setClickEvent($ApplicationObject+".Deleteweight()")
}
addwidget(label1)
addwidget(text1)
addwidget(btnAdd)
addwidget(btnDelete)
}
layoutData = new qhboxlayout()
{
Table1 = new qTableWidget(win1) {
setrowcount(0)
setcolumncount(3)
setselectionbehavior(QAbstractItemView_SelectRows)
setHorizontalHeaderItem(0, new QTableWidgetItem("Date"))
setHorizontalHeaderItem(1, new QTableWidgetItem("Time"))
setHorizontalHeaderItem(2, new QTableWidgetItem("Weight"))
setitemChangedEvent($ApplicationObject+".ItemChanged()")
setAlternatingRowColors(true)
horizontalHeader().setStyleSheet("color: blue")
verticalHeader().setStyleSheet("color: red")
}
addWidget(Table1)
}
layoutClose = new qhboxlayout()
{
btnclose = new qpushbutton(win1) {
setText("Close")
setClickEvent("MyApp.Quit()")
}
addwidget(btnClose)
}
layoutMain = new qvboxlayout()
{
addlayout(layoutButtons)
addLayout(LayoutData)
addLayout(layoutClose)
}
setlayout(layoutMain)
self.OpenDatabase()
self.ShowRecords()
show()
}
64.55. Weight History Application 742
5. Ring Documentation, Release 1.9
Func OpenDatabase
lCreate = False
if not fexists(cDir + "weighthistory.db")
lCreate = True
ok
new QSqlDatabase() {
this.oCon = addDatabase("QSQLITE") {
setDatabaseName("weighthistory.db")
Open()
}
}
if lCreate
new QSqlQuery( ) {
exec("create table weighthistory (id integer primary key,"+
" f_date varchar(10),"+
" f_time varchar(8), f_weight varchar(8) );")
delete()
}
ok
Func CloseDatabase
oCon.Close()
Func AddWeight
cWeight = text1.text()
AddRecord(cWeight)
Func DeleteWeight
Table1 {
nRow = CurrentRow()
if nRow >= 0
nID = this.aIDs[nROW+1]
new QSqlQuery( ) {
exec("delete from weighthistory where id = " + nID )
}
Del(this.aIDs,nRow+1)
removerow(nRow)
selectrow(nRow)
ok
}
Func AddRecord cWeight
new QSqlQuery( ) {
cStr = "insert into weighthistory (f_date,f_time,f_weight) values"+
" ('%f1','%f2','%f3')"
cDate = Date()
cTime = Time()
cStr = substr(cStr,"%f1",cDate)
cStr = substr(cStr,"%f2",cTime)
cStr = substr(cStr,"%f3",cWeight)
exec(cStr)
delete()
}
ShowRecords()
Table1.selectrow(table1.rowcount()-1)
64.55. Weight History Application 743
6. Ring Documentation, Release 1.9
Func ShowRecords
table1.setitemChangedEvent("")
aIDs = []
query = new QSqlQuery() {
exec("select * from weighthistory")
nRows = 0
this.Table1.setrowcount(0)
while movenext()
this.table1 {
insertRow(nRows)
this.aIDs + query.value(0).tostring()
for x = 1 to 3
cStr = query.value(x).tostring()
item = new qTableWidgetItem(cStr)
setItem(nRows,x-1,item)
next
}
nRows++
end
delete()
}
table1.setitemChangedEvent($ApplicationObject+".ItemChanged()")
Func ItemChanged
nRow = table1.currentrow()
if nRow >= 0
myitem = Table1.item(table1.currentrow(),0)
cDate = myitem.text()
myitem = Table1.item(table1.currentrow(),1)
cTime = myitem.text()
myitem = Table1.item(table1.currentrow(),2)
cWeight = myitem.text()
new QSqlQuery( ) {
cStr = "update weighthistory set f_date ='%f1' , f_time = '%f2' , "+
"f_weight ='%f3' where id = " + this.aIDs[nROW+1]
cStr = substr(cStr,"%f1",cDate)
cStr = substr(cStr,"%f2",cTime)
cStr = substr(cStr,"%f3",cWeight)
exec(cStr)
delete()
}
ok
The next screen shot for the application during the runtime
64.55. Weight History Application 744
7. Ring Documentation, Release 1.9
64.56 Notepad Application
In the next example we will see simple Notepad developed using the RingQt
Load "guilib.ring"
cActiveFileName = ""
aTextColor = [0,0,0]
aBackColor = [255,255,255]
cFont = "MS Shell Dlg 2,14,-1,5,50,0,0,0,0,0"
cWebsite = "http://www.google.com"
64.56. Notepad Application 745
8. Ring Documentation, Release 1.9
oSearch = NULL
oSearchValue = NULL
oSearchCase = NULL
oSearchFilter = NULL
oReplaceValue = NULL
lAskToSave = false
MyApp = New qApp {
win1 = new qMainWindow() {
setwindowtitle("Ring Notepad")
setGeometry(100,100,400,400)
aBtns = [
new qpushbutton(win1) {
setbtnimage(self,"image/new.png")
setclickevent("pNew()")
settooltip("New File")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/open.png")
setclickevent("pOpen()")
settooltip("Open File")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/save.png")
setclickevent("pSave()")
settooltip("Save")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/saveas.png")
setclickevent("pSaveAs()")
settooltip("Save As")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/cut.png")
setclickevent("pCut()")
settooltip("Cut")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/copy.png")
setclickevent("pCopy()")
settooltip("Copy")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/paste.png")
setclickevent("pPaste()")
settooltip("Paste")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/font.png")
setclickevent("pFont()")
settooltip("Font")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/colors.jpg")
setclickevent("pColor()")
settooltip("Text Color")
64.56. Notepad Application 746
9. Ring Documentation, Release 1.9
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/search.png")
setclickevent("pFind()")
settooltip("Find and Replace")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/print.png")
setclickevent("pPrint()")
settooltip("Print")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/debug.png")
setclickevent("pDebug()")
settooltip("Debug (Run then wait!)")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/run.png")
setclickevent("pRun()")
settooltip("Run the program")
} ,
new qpushbutton(win1) {
setbtnimage(self,"image/close.png")
setclickevent("pQuit()")
settooltip("Quit")
}
]
tool1 = addtoolbar("files") {
for x in aBtns addwidget(x) addseparator() next
}
menu1 = new qmenubar(win1) {
sub1 = addmenu("File")
sub2 = addmenu("Edit")
sub3 = addmenu("View")
sub4 = addmenu("Help")
sub1 {
oAction = new qAction(win1) {
setShortcut(new QKeySequence("Ctrl+n"))
setbtnimage(self,"image/new.png")
settext("New")
setclickevent("pNew()")
}
addaction(oAction)
oAction = new qAction(win1) {
setShortcut(new QKeySequence("Ctrl+o"))
setbtnimage(self,"image/open.png")
settext("Open")
setclickevent("pOpen()")
}
addaction(oAction)
addseparator()
oAction = new qAction(win1) {
setShortcut(new QKeySequence("Ctrl+s"))
setbtnimage(self,"image/save.png")
settext("Save")
setclickevent("pSave()")
64.56. Notepad Application 747