The Ring programming language version 1.5.2 book - Part 12 of 181
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The document summarizes the new features and changes in Ring 1.3. Some of the key updates include better RingQt and Ring Notepad functionality, adding Ring mode for the Emacs editor, improvements to the standard library, changes to the Loop/Exit command, new functions like PackageName() and Swap(), and classes now return by reference when using the Return Self statement.
![Ring Documentation, Release 1.5.2
6.5 Better StdLib
The StdLib is updated to include the next functions
• SplitMany()
• JustFilePath()
• JustFileName()
6.6 Better Loop|Exit Command
The Loop|Exit command is updated to accept Expressions after the command (not only numbers).
The syntax:
Loop|Exit [Number]
Changed to
Loop|Exit [Expression]
Example
XLoop = 2 # The outer loop
YLoop = 1 # The first inner loop
for x = 1 to 10
for y = 1 to 10
see "x=" + x + " y=" + y + nl
if x = 3 and y = 5
exit XLoop
ok
6.5. Better StdLib 93](https://image.slidesharecdn.com/111pdfsamfayedringdoc1-180227021246/85/The-Ring-programming-language-version-1-5-2-book-Part-12-of-181-9-320.jpg)
![Ring Documentation, Release 1.5.2
next
next
6.7 New Functions
• PackageName() function
• Swap() function
Example:
aList = [:one,:two,:four,:three]
see aList
see copy("*",50) + nl
swap(aList,3,4)
see aList
Output
one
two
four
three
**************************************************
one
two
three
four
6.8 Return Self by Reference
In this release, using Return Self in class methods will return the object by reference.
Example:
mylist = [new mytest() {
see self
x = 20
see self
}]
see mylist
class mytest
x = 15
func init
return self # Return by reference
Output
x: 15.000000
x: 20.000000
x: 20.000000
6.7. New Functions 94](https://image.slidesharecdn.com/111pdfsamfayedringdoc1-180227021246/85/The-Ring-programming-language-version-1-5-2-book-Part-12-of-181-10-320.jpg)
The Ring programming language version 1.5.2 book - Part 12 of 181
- 1. CHAPTER SIX WHAT IS NEW IN RING 1.3? In this chapter we will learn about the changes and new features in Ring 1.3 release. 6.1 List of changes and new features Ring 1.3 comes with many new features • Better RingQt • Better Ring Notepad • Ring mode for Emacs Editor • Better StdLib • Better Loop/Exit Command • New Functions • Return Self by Reference • Using ‘<’ and ‘:’ operators as ‘from’ keyword • Embedding Ring in Ring without sharing the State • RingZip Library • Form Designer 6.2 Better RingQt (1) Another version of QPixMap class is added (QPixMap2) which takes (int width,int height) during object init. Example: Load "guilib.ring" New qapp { win1 = new qwidget() { setwindowtitle("Drawing using QPixMap") setgeometry(100,100,500,500) label1 = new qlabel(win1) { setgeometry(10,10,400,400) settext("") 85
- 2. Ring Documentation, Release 1.5.2 } imageStock = new qlabel(win1) { image = new qPixMap2(200,200) color = new qcolor() { setrgb(255,255,255,255) } pen = new qpen() { setcolor(color) setwidth(10) } new qpainter() { begin(image) setpen(pen) drawline(0,0,200,200) drawline(200,0,0,200) endpaint() } setpixmap(image) } show() } exec() } Screen Shot: 6.2. Better RingQt 86
- 3. Ring Documentation, Release 1.5.2 2. The Objects Library is updated to include the next functions • Last_WindowID() • Open_WindowNoShow() • Open_WindowAndLink() Also the class name (WindowViewBase) is changed to (WindowsViewParent). In The next code for example the Open_WindowAndLink() will create an object from the SecondWindowController Class Then will add the Method SecondWindow() to the FirstWindowController Class Also will add the Method FirstWindow() to the SecondWindowController Class So the SendMessage() method in FirstWindowController class can use the SecondWindow() method to access the object. class firstwindowController from windowsControllerParent oView = new firstwindowView func OpenSecondWindow Open_WindowAndLink(:SecondWindowController,self) 6.2. Better RingQt 87
- 4. Ring Documentation, Release 1.5.2 func SendMessage if IsSecondWindow() SecondWindow().setMessage("Message from the first window") ok func setMessage cMessage oView.Label1.setText(cMessage) 3. The next classes are added to RingQt • QPixMap2 • QScrollArea • QSplitter • QCompleter • QCompleter2 • QCompleter3 • QProcess • QMdiArea • QMdiSubWindow • QCursor • QListView • QDesktopServices 4. Many constants are defined in qt.rh (loaded by guilib.ring) 5. New Classes names - Index Start from 1 We added new classes to RingQt - another version of classes where the class names doesn’t start with the “q” letter Also updated methods so the index start from 1 when we deal with the GUI controls like • ComboBox • ListWidget • TableWidget • TreeWidget These classes are inside guilib.ring under the package name : System.GUI To use it load "guilib.ring" import System.GUI This doesn’t have any effect on our previous code, It’s just another choice for better code that is consistent with Ring rules. Also the form designer is updated to provide us the choice between using classes where (index start from 0) or (index start from 1) Example (Uses the Form Designer) 1. https://github.com/ring-lang/ring/blob/master/applications/formdesigner/tests/indexstart/indexstartView.ring 6.2. Better RingQt 88
- 5. Ring Documentation, Release 1.5.2 2. https://github.com/ring-lang/ring/blob/master/applications/formdesigner/tests/indexstart/indexstartController.ring 6.3 Better Ring Notepad 1. Using QPlainTextEdit instead of QTextEdit 2. Displaying the line number for each line in the source code file. Screen Shot: 3. Auto-Complete for Ring functions names, classes and words in the opened file. 6.3. Better Ring Notepad 89
- 6. Ring Documentation, Release 1.5.2 4. Functions and Methods List 6.3. Better Ring Notepad 90
- 7. Ring Documentation, Release 1.5.2 5. Output Window 6. Classes List 6.3. Better Ring Notepad 91
- 8. Ring Documentation, Release 1.5.2 7. Change the Current Style 6.4 Ring mode for Emacs Editor Ring 1.3 comes with Ring mode for Emacs Editor Screen Shot: 6.4. Ring mode for Emacs Editor 92
- 9. Ring Documentation, Release 1.5.2 6.5 Better StdLib The StdLib is updated to include the next functions • SplitMany() • JustFilePath() • JustFileName() 6.6 Better Loop|Exit Command The Loop|Exit command is updated to accept Expressions after the command (not only numbers). The syntax: Loop|Exit [Number] Changed to Loop|Exit [Expression] Example XLoop = 2 # The outer loop YLoop = 1 # The first inner loop for x = 1 to 10 for y = 1 to 10 see "x=" + x + " y=" + y + nl if x = 3 and y = 5 exit XLoop ok 6.5. Better StdLib 93
- 10. Ring Documentation, Release 1.5.2 next next 6.7 New Functions • PackageName() function • Swap() function Example: aList = [:one,:two,:four,:three] see aList see copy("*",50) + nl swap(aList,3,4) see aList Output one two four three ************************************************** one two three four 6.8 Return Self by Reference In this release, using Return Self in class methods will return the object by reference. Example: mylist = [new mytest() { see self x = 20 see self }] see mylist class mytest x = 15 func init return self # Return by reference Output x: 15.000000 x: 20.000000 x: 20.000000 6.7. New Functions 94