Lazarus
Miscellaneous => Documentation (Maintaining -) => Topic started by: Handoko on January 25, 2020, 08:18:18 pm
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~off topic~
@Martin_fr
May I suggest a section for short demos? I saw people often wrote demos for answering question in the forum. Some of them are short but interesting, should be shown to the public. I think they will be attractive for newbies.
For examples:
Move shape with mouse by mousemove by furious programming:
http://forum.lazarus.freepascal.org/index.php/topic,43376.msg303582.html#msg303582 (http://forum.lazarus.freepascal.org/index.php/topic,43376.msg303582.html#msg303582)
Drawing, moving and make connection between shapes by Handoko:
http://forum.lazarus.freepascal.org/index.php/topic,41036.msg284131.html#msg284131 (http://forum.lazarus.freepascal.org/index.php/topic,41036.msg284131.html#msg284131)
A simple pong game by Handoko:
http://forum.lazarus.freepascal.org/index.php/topic,42439.msg297949.html#msg297949 (http://forum.lazarus.freepascal.org/index.php/topic,42439.msg297949.html#msg297949)
There are lots of them, but I forget where they are.
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I haven't checked if we already have something or not.
But to start with, maybe a tutorial page overview on the wiki? Maybe even as a portal https://wiki.lazarus.freepascal.org/Category:Portals ?
Then create individual wiki pages for each of them, or link to the forum.
The page could be linked from the home page, in the "Education" section.
This is already linked on top of the home page https://wiki.freepascal.org/Lazarus_Documentation#Lazarus_and_Pascal_Tutorials
Could be somehow integrated and the link adjusted.....
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I meant to put them on the Lazarus website. I think newbies / new comers are not likely to visit the wiki.
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I meant to put them on the Lazarus website. I think newbies / new comers are not likely to visit the wiki.
It wouldn't be a problem to add a page, if someone creates and maintains it.
But the latter is kind of the issue => it needs maintenance. Even with a volunteer, there would then be only one person to integrate the updates. (And people would need a way to reach that person)
Currently we have the "online tutorials" link on the website. (It's in the top section, no scrolling needed). That should be easy to find.
The problem is => the wiki page to which it points needs a maintainer.
If it gets reworked, and made to look like the portal pages then new users would probably use it.
Look at https://wiki.lazarus.freepascal.org/Portal:Windows => that page invites to stay.
As for doing more on the website....
If someone does the work, we can add one new page "Help", "First steps" or "Docs and info" or ......
But I do not think this page should actually hold the content (i.e. list of tutorials) => that changes. And people who want to add new tutorials should be able to do that and add them.
So what could be on the page is like a directory of help pages. Link to the online help and what to expect from the help, link to one or more wiki portals, and what to expect to find there.
I suggest various groups of links into the wiki (mainly to portal pages)
install/setup
first step creating and apps / tutorials
OS specifics
....
If we put all those links on one (sub-) page, rather than having them strewn all over the main page, that might indeed be helpful.
What do you think?
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This topic was split out of https://forum.lazarus.freepascal.org/index.php/topic,48260.0.html
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But to start with, maybe a tutorial page overview on the wiki? Maybe even as a portal https://wiki.lazarus.freepascal.org/Category:Portals ?
Portals are fantastic concepts which thematically gather together all the scattered and otherwise difficult to find Wiki pages. Unfortunately the Portal pages suffer a similar fate of being scattered and difficult to find.
Can we please add the Portal page galleries which serbod prototyped at https://wiki.lazarus.freepascal.org/SANDBOX to the Main Page? At the moment none of these can be found from the home page.
If noone else takes it up in the near future, I'll also look at creating a Tutorials portal which is not a small undertaking - there are already a lot of tutorials in the Wiki, from programming AVR microcontrollers to adding an Apple Help book to an application. See: https://wiki.lazarus.freepascal.org/Category:Tutorials
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Regarding the image portal links for the main page:
I sent out a mail to the other team members. Just to make sure there is nothing about the main page that I am unaware of.
If there is not, I will take care of it in a bit.
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A section with examples or "how to" would be interesting. I agree with @handoko, there are very good demos attached in the forum messages.
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May I suggest a section for short demos? I saw people often wrote demos for answering question in the forum. Some of them are short but interesting, should be shown to the public. I think they will be attractive for newbies.
Good idea! It will be useful to have a collection of good quality demo applications!
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Just to mention, on top of the tutorial links in previous posts of this thread, we also have
https://wiki.lazarus.freepascal.org/Projects_using_Lazarus
https://wiki.lazarus.freepascal.org/Lazarus_Application_Gallery
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Just to mention, on top of the tutorial links in previous posts of this thread, we also have
https://wiki.lazarus.freepascal.org/Projects_using_Lazarus
https://wiki.lazarus.freepascal.org/Lazarus_Application_Gallery
By the way, how I can add my application to these lists?
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By the way, how I can add my application to these lists?
Top right of the wiki page: register.
Once registered you can edit (most) pages.
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Too right ! I really like the idea of a wiki page listing pointers to smaller tips and trick, demos etc in the forum.
Maybe its a good idea if when someone adds the forum link to the wiki page, they also post a message to the forum thread saying "I just added this to XXX wiki page". That way, people, especially ones looking for those little demos, will be aware of the wiki page.
Davo
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Right, while this is definitely Handoko's idea, just about every one agrees its a good one. I'm going to give it a bump !
Handoko wanted it on the main website rather than the wiki. I suggest a link from the main website to a a wiki page is easiest solution. Below is my first cut at some usage guidelines. I think this is what people have in mind. Unless someone objects, I will create a wiki page along these lines and we can do any necessary development there rather than a long conversation here on the forum.
Table of Contents
.........
.........
Guidelines
* This page contains a number of tips, tricks and techniques relating to coding FPC/Lazarus projects. Its a wiki page and that means everyone is entitled, indeed, encouraged, to contribute.
* If you see something relevant in the forum or elsewhere (always observing copyright and license) please add it to this page.
* Content that relates to one particular component is better added to that component's own wiki page. If its more than just how to use the component, please link it under "Components". Conversely, content that applies to multiple components belongs here with links from the relevant components.
* This page is about small snippets rather than large works, if what you need to add is longer than 20 or so lines, maybe its a new page page in its own right.
* Please add only things you know are correct, testing yourself is a great idea.
* Remember that this page is particularly targeted at new users but thats no reason to leave out advanced topics.
* Please try and keep within the heading structure but don't be afraid to add a new heading if its necessary.
* Don't duplicate wiki content, a few well chosen words and a link may be all thats needed. And a link to a forum thread may well also be appropriate.
* When adding content, say from a FPC/Lazarus forum, post a note on that forum thread saying what you have done.
* There is a separate page for IDE Tips and Trick (link)
Drawing and Graphics
Database
Basic Programming
.......
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Some good stuff in Category "Code Snippets". I sometimes post forum snippets there.
https://wiki.lazarus.freepascal.org/Category:Code_Snippets
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And also:
https://wiki.lazarus.freepascal.org/Category:Example_programs
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Some good stuff in Category "Code Snippets". I sometimes post forum snippets there.
https://wiki.lazarus.freepascal.org/Category:Code_Snippets
Yep, I agree. Its good but I did not know it even existed. It is inconsistent with Handoko's original suggestion, but does work well. Its better for larger blocks and maybe a bit wasteful of the smaller ones Handoko had in mind ?
Should we do both ? I do think we should make a point of posting, in a forum thread "I added this trick to the wiki LINK" in either case, thus ensuring people looking for such things know that snippets (of either type) exist and can be found on the wiki.
Trev, I think your link is to larger scale demos (also under promoted) but not what Handoko's suggestion was all about, perhaps ???
Davo
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What I've been doing, generally for macOS related code, is:
* Larger items: creating new pages in the wiki and adding the category code snippets and linking them from the Mac Portal; and
* Smaller items: adding them to the macOS Programming Tips page.
There are portals and programming tips pages (linked from the respective portal) for the common platforms as well as topic themed portals.
Portals: https://wiki.freepascal.org/Category:Portals
The Linux and Windows portals do not seem to receive much love, unlike the macOS portal :)
Trev, I think your link is to larger scale demos (also under promoted) but not what Handoko's suggestion was all about, perhaps ???
Short demos could be classified as either Code Snippets or Example Programs and have their own Wiki pages and be like to the relevant portal - they're probably too large to be considered for the programming tips pages (I split a lot of larger items out of those pages because otherwise they tended to grow exponentially).
Of course, the bottom line is that the harvest is plentiful, but the labourers are few :( I think Martin was alluding to this in his post.
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Hello. I am not good in organizing, categorizing and writing wiki. But I have collected a list of demos in the forum, which I believe some will find it useful. I gave them a short title and a one-line description. If you find any of them is not fit with the content, please modify them. All of them are downloadable except the item #52, which is interesting and very short.
Total 65 items. It is not finished, if you find any new downloadable interesting code in this forum, please add to the list.
Here I start with the demos I wrote:
#1. Simple Form Transitions
Category: UI
Make your UI looks interesting by adding some simple transition effects.
https://forum.lazarus.freepascal.org/index.php/topic,37943.msg256549.html#msg256549 (https://forum.lazarus.freepascal.org/index.php/topic,37943.msg256549.html#msg256549)
#2. Drawing, Moving, Make Connection Between Shapes
Category: General
It shows TShape can be use for simple diagram drawing.
https://forum.lazarus.freepascal.org/index.php/topic,41036.msg284131.html#msg284131 (https://forum.lazarus.freepascal.org/index.php/topic,41036.msg284131.html#msg284131)
#3. Generate Huge Text File
Category: General
Nothing special but there user can see a small trick reducing program responsiveness to
improve performance, try it to see it yourself the difference.
https://forum.lazarus.freepascal.org/index.php/topic,43806.msg307101.html#msg307101 (https://forum.lazarus.freepascal.org/index.php/topic,43806.msg307101.html#msg307101)
#4. Get Pixel Color of an Image
Category: Graphics
It may sound easy but actually it is not so easy.
https://forum.lazarus.freepascal.org/index.php/topic,37242.msg252828.html#msg252828 (https://forum.lazarus.freepascal.org/index.php/topic,37242.msg252828.html#msg252828)
#5. Searchable StringGrid
Category: UI
Requirement: DBFLaz
Load data from a dbf, show it on a TStringGrid, search and highlight the cells.
https://forum.lazarus.freepascal.org/index.php/topic,37181.msg249361.html#msg249361 (https://forum.lazarus.freepascal.org/index.php/topic,37181.msg249361.html#msg249361)
https://forum.lazarus.freepascal.org/index.php/topic,37181.msg249208.html#msg249208 (https://forum.lazarus.freepascal.org/index.php/topic,37181.msg249208.html#msg249208)
#6. Drag and Drop Shape
Category: General
Drag and drop without using the built-in drag and drop feature.
https://forum.lazarus.freepascal.org/index.php/topic,38844.msg265130.html#msg265130 (https://forum.lazarus.freepascal.org/index.php/topic,38844.msg265130.html#msg265130)
#7. Simple Pong Game
Category: Graphics
A very simple single player Pong game.
https://forum.lazarus.freepascal.org/index.php/topic,42439.msg297949.html#msg297949 (https://forum.lazarus.freepascal.org/index.php/topic,42439.msg297949.html#msg297949)
#8. Binary File Demo
Category: General
This demo shows how to show, append and delete data from a binary file.
https://forum.lazarus.freepascal.org/index.php/topic,43045.msg307111.html#msg307111 (https://forum.lazarus.freepascal.org/index.php/topic,43045.msg307111.html#msg307111)
#9. Text File Demo
Category: General
This demo shows how to read and append data to a text file.
https://forum.lazarus.freepascal.org/index.php/topic,37766.msg254800.html#msg254800 (https://forum.lazarus.freepascal.org/index.php/topic,37766.msg254800.html#msg254800)
#10. Text File Demo #2
Category: General
Another demo showing how to read and append data to a text file.
https://forum.lazarus.freepascal.org/index.php/topic,39769.msg274036.html#msg274036 (https://forum.lazarus.freepascal.org/index.php/topic,39769.msg274036.html#msg274036)
#11. Popup With ListBox
Category: UI
A custom popup form with a list box.
https://forum.lazarus.freepascal.org/index.php/topic,37369.msg250939.html#msg250939 (https://forum.lazarus.freepascal.org/index.php/topic,37369.msg250939.html#msg250939)
#12. OpenGL ES2 Circle
Category: Android
Requirement: LAMW
Drawing a circle using jCanvasES2.DrawLine instead of DrawCircle.
https://forum.lazarus.freepascal.org/index.php/topic,44811.msg315311.html#msg315311 (https://forum.lazarus.freepascal.org/index.php/topic,44811.msg315311.html#msg315311)
#13. Frameless Popup
Category: UI
An alternative for ShowMessage.
https://forum.lazarus.freepascal.org/index.php/topic,48291.msg348084.html#msg348084 (https://forum.lazarus.freepascal.org/index.php/topic,48291.msg348084.html#msg348084)
#14. Drag a Button to a Panel
Category: UI
A short demo showing how to do drag and drop.
https://forum.lazarus.freepascal.org/index.php/topic,45346.msg320626.html#msg320626 (https://forum.lazarus.freepascal.org/index.php/topic,45346.msg320626.html#msg320626)
#15. Checkbox in StringGrid
Category: UI
Maybe you haven’t known TStringGrid can show checkbox instead of text.
https://forum.lazarus.freepascal.org/index.php/topic,45080.msg317949.html#msg317949 (https://forum.lazarus.freepascal.org/index.php/topic,45080.msg317949.html#msg317949)
#16. OpenGL ES2 Rectangle
Category: Android
Requirement: LAMW
Drawing a rectangle using jCanvasES2.DrawPolyFill instead of DrawRect.
https://forum.lazarus.freepascal.org/index.php/topic,44708.msg314630.html#msg314630 (https://forum.lazarus.freepascal.org/index.php/topic,44708.msg314630.html#msg314630)
#17. Simple Polygon Animation
Category: Android
Requirement: LAMW
A simple animation using jCanvas.
https://forum.lazarus.freepascal.org/index.php/topic,44241.msg310991.html#msg310991 (https://forum.lazarus.freepascal.org/index.php/topic,44241.msg310991.html#msg310991)
#18. Game Map Editor
Category: Graphics
A very basic load and edit map for game.
https://forum.lazarus.freepascal.org/index.php/topic,43999.msg309134.html#msg309134 (https://forum.lazarus.freepascal.org/index.php/topic,43999.msg309134.html#msg309134)
#19. Fading Images Using BGRABitmap
Category: Graphics
Requirement: BGRABitmap
Build your own slideshow, there you also learn doing proportional scaling using aspect ratio of the picture.
https://forum.lazarus.freepascal.org/index.php/topic,43823.msg307918.html#msg307918 (https://forum.lazarus.freepascal.org/index.php/topic,43823.msg307918.html#msg307918)
#20. Center Resize Image on Screen
Category: Graphics
Resize an image at the center position of the image.
https://forum.lazarus.freepascal.org/index.php/topic,43424.msg303879.html#msg303879 (https://forum.lazarus.freepascal.org/index.php/topic,43424.msg303879.html#msg303879)
#21. Color Fade ProgressBar
Category: UI
Requirement: BGRAControls
Short demo showing how to use TBGRAFlashProgressBar.
https://forum.lazarus.freepascal.org/index.php/topic,42610.msg297603.html#msg297603 (https://forum.lazarus.freepascal.org/index.php/topic,42610.msg297603.html#msg297603)
#22. Save Component Values to a File
Category: General
You can save text data easily using TStringList.SaveToFile.
https://forum.lazarus.freepascal.org/index.php/topic,42293.msg295057.html#msg295057 (https://forum.lazarus.freepascal.org/index.php/topic,42293.msg295057.html#msg295057)
#23. Load & Show Image From Resource Stream
Category: General
Learn how to add image to project resource and load it.
https://forum.lazarus.freepascal.org/index.php/topic,42144.msg293579.html#msg293579 (https://forum.lazarus.freepascal.org/index.php/topic,42144.msg293579.html#msg293579)
#24. Minimize to TaskBar or Tray
Category: General
A workaround to minimize to tray, not the best solution but works.
https://forum.lazarus.freepascal.org/index.php/topic,42124.msg293401.html#msg293401 (https://forum.lazarus.freepascal.org/index.php/topic,42124.msg293401.html#msg293401)
#25. Darkening a Form
Category: UI
Requirement: BGRAControls
Darkening the mainform when modal window is shown.
https://forum.lazarus.freepascal.org/index.php/topic,42107.msg293295.html#msg293295 (https://forum.lazarus.freepascal.org/index.php/topic,42107.msg293295.html#msg293295)
#26. TMyCircle Component
Category: General
A short demo showing how to write your own component, the OOP way.
https://forum.lazarus.freepascal.org/index.php/topic,42106.msg293281.html#msg293281 (https://forum.lazarus.freepascal.org/index.php/topic,42106.msg293281.html#msg293281)
#27. Open a Form Beside The Current Form
Category: UI
Programmatically open and close a form.
https://forum.lazarus.freepascal.org/index.php/topic,42058.msg292943.html#msg292943 (https://forum.lazarus.freepascal.org/index.php/topic,42058.msg292943.html#msg292943)
#28. Simple Animation
Category: Graphics
A very basic animation using a TTimer.
https://forum.lazarus.freepascal.org/index.php/topic,41135.msg284936.html#msg284936 (https://forum.lazarus.freepascal.org/index.php/topic,41135.msg284936.html#msg284936)
#29. Moving Object By Pressing a Key
Category: General
How to detect left/right shift key pressing.
https://forum.lazarus.freepascal.org/index.php/topic,41089.msg284614.html#msg284614 (https://forum.lazarus.freepascal.org/index.php/topic,41089.msg284614.html#msg284614)
#30. Pausing & Continuing An Animation
Category: General
Animation demo showing how to pause and continue the animation.
https://forum.lazarus.freepascal.org/index.php/topic,39790.msg274096.html#msg274096 (https://forum.lazarus.freepascal.org/index.php/topic,39790.msg274096.html#msg274096)
#31. Scaling a Form
Category: UI
You can easily scale a form by using TForm.ScaleBy, unfortunately it does not work correctly on Linux.
https://forum.lazarus.freepascal.org/index.php/topic,39477.msg271075.html#msg271075 (https://forum.lazarus.freepascal.org/index.php/topic,39477.msg271075.html#msg271075)
#32. Moving Circles
Category: Graphics
These 2 demos showing what is and how to fix a flickering effect.
https://forum.lazarus.freepascal.org/index.php/topic,38136.msg263143.html#msg263143 (https://forum.lazarus.freepascal.org/index.php/topic,38136.msg263143.html#msg263143)
#33. Convert Unicode to TBytes
Category: General
A demo showing how to use WideBytesOf and WideString functions.
https://forum.lazarus.freepascal.org/index.php/topic,37887.msg256019.html#msg256019 (https://forum.lazarus.freepascal.org/index.php/topic,37887.msg256019.html#msg256019)
#34. Vertical Menu
Category: UI
Showing how to make vertical menu using TPanel and TScrollBox.
https://forum.lazarus.freepascal.org/index.php/topic,37537.msg252573.html#msg252573 (https://forum.lazarus.freepascal.org/index.php/topic,37537.msg252573.html#msg252573)
#35. Load a Picture and Show It
Category: General
A very short demo showing how to use OpenPictureDialog and LoadFromFile.
https://forum.lazarus.freepascal.org/index.php/topic,37442.msg251587.html#msg251587 (https://forum.lazarus.freepascal.org/index.php/topic,37442.msg251587.html#msg251587)
#36. Colorful Panels
Category: UI
This simple demo show how to use TControl.Align.
https://forum.lazarus.freepascal.org/index.php/topic,37397.msg251208.html#msg251208 (https://forum.lazarus.freepascal.org/index.php/topic,37397.msg251208.html#msg251208)
#37. Button With Animation
Category: UI
Showing a TBitButton with animation images.
https://forum.lazarus.freepascal.org/index.php/topic,11656.msg251161.html#msg251161 (https://forum.lazarus.freepascal.org/index.php/topic,11656.msg251161.html#msg251161)
#38. A Small Icon On TEdit
Category: UI
A trick showing how to put an icon on TEdit.
https://forum.lazarus.freepascal.org/index.php/topic,37346.msg250750.html#msg250750 (https://forum.lazarus.freepascal.org/index.php/topic,37346.msg250750.html#msg250750)
#39. StringGrid Cell Validation
Category: UI
Automatically set focus on the cell if it provide wrong input.
https://forum.lazarus.freepascal.org/index.php/topic,37286.msg250687.html#msg250687 (https://forum.lazarus.freepascal.org/index.php/topic,37286.msg250687.html#msg250687)
#40. Change Background Color of an Image
Category: Graphics
A not so accurate colorshift on an image.
https://forum.lazarus.freepascal.org/index.php/topic,37251.msg249962.html#msg249962 (https://forum.lazarus.freepascal.org/index.php/topic,37251.msg249962.html#msg249962)
#41. Control Object Moving Direction Using Keyboard
Category: General
It shows how to detect user keyboard input.
https://forum.lazarus.freepascal.org/index.php/topic,36306.msg241818.html#msg241818 (https://forum.lazarus.freepascal.org/index.php/topic,36306.msg241818.html#msg241818)
#42. OpenGL 2D Text Using Textures
Category: Graphics
Requirement: LazOpenGLContext
It shows how to write text in OpenGL using textures loaded from an image file.
https://forum.lazarus.freepascal.org/index.php/topic,35850.msg238019.html#msg238019 (https://forum.lazarus.freepascal.org/index.php/topic,35850.msg238019.html#msg238019)
#43. ListBox Work as Tabs For StringGrid
Category: UI
It shows how to add items to ListBox and StringGrid at runtime.
https://forum.lazarus.freepascal.org/index.php/topic,47651.msg341708.html#msg341708 (https://forum.lazarus.freepascal.org/index.php/topic,47651.msg341708.html#msg341708)
#44. TCanvas Text
Category: Graphics
Draw superscript and subscript text using TCanvas.
https://forum.lazarus.freepascal.org/index.php/topic,46775.msg333936.html#msg333936 (https://forum.lazarus.freepascal.org/index.php/topic,46775.msg333936.html#msg333936)
#45. Sticky Balls
Category: Graphics
Not so accurate inverse kinematics demo.
https://forum.lazarus.freepascal.org/index.php/topic,38511.msg262706.html#msg262706 (https://forum.lazarus.freepascal.org/index.php/topic,38511.msg262706.html#msg262706)
And these are from other fellows:
#46. Vertical Menu
Category: UI
TVerticalMenu, by howardpc.
https://forum.lazarus.freepascal.org/index.php/topic,37537.msg252612.html#msg252612 (https://forum.lazarus.freepascal.org/index.php/topic,37537.msg252612.html#msg252612)
#47. GradientFill Rectangle
Category: Graphics
A demo showing how to use gradientfill, by josh (improved by GetMem).
https://forum.lazarus.freepascal.org/index.php/topic,41265.msg286208.html#msg286208 (https://forum.lazarus.freepascal.org/index.php/topic,41265.msg286208.html#msg286208)
#48. Rock, Paper, Scissors
Category: Graphics
A simple game, by x2nie.
Note for Linux Users: need to change the path delimiter to make the code work.
https://forum.lazarus.freepascal.org/index.php/topic,41135.msg284928.html#msg284928 (https://forum.lazarus.freepascal.org/index.php/topic,41135.msg284928.html#msg284928)
#49. Darkening a Form
Category: Graphics
Requirement: BGRAControls
How to darken a form, by lainz.
https://forum.lazarus.freepascal.org/index.php/topic,42107.msg293431.html#msg293431 (https://forum.lazarus.freepascal.org/index.php/topic,42107.msg293431.html#msg293431)
#50. Color Fade ProgressBar
Category: UI
Color fade progress without using third party component, by sash.
https://forum.lazarus.freepascal.org/index.php/topic,42610.msg297651.html#msg297651 (https://forum.lazarus.freepascal.org/index.php/topic,42610.msg297651.html#msg297651)
#51. Bullet and Asteroid Collision Detection Demo
Category: Graphics
It shows how to do collision detection between bullet and a polygonal object, by IroncrossBG.
https://forum.lazarus.freepascal.org/index.php/topic,45729.msg323878.html#msg323878 (https://forum.lazarus.freepascal.org/index.php/topic,45729.msg323878.html#msg323878)
#52. ShowMessage on Console Mode
Category: UI
Requirement: LCL needed to be in the project’s required packages
It is possible to use ShowMessage on console mode program, by Thaddy.
https://forum.lazarus.freepascal.org/index.php/topic,37425.msg251457.html#msg251457 (https://forum.lazarus.freepascal.org/index.php/topic,37425.msg251457.html#msg251457)
#53. Draw Circles Using CSMFL
Category: Graphics
Requirement: SFML/CSFML headers binding and CSFML libraries
The demo shows how to use CSFML in FPC, by DJMaster.
https://forum.lazarus.freepascal.org/index.php/topic,37425.msg259245.html#msg259245 (https://forum.lazarus.freepascal.org/index.php/topic,37425.msg259245.html#msg259245)
#54. Get Pixel Color of an Image
Category: Graphics
Load an image, show its information and the pixel color under the mouse pointer, by Molly.
https://forum.lazarus.freepascal.org/index.php/topic,37242.msg253349.html#msg253349 (https://forum.lazarus.freepascal.org/index.php/topic,37242.msg253349.html#msg253349)
#55. Move Shape With Mouse by Mouse Move
Category: Graphics
Move the rectangles using mouse, by furious programming.
https://forum.lazarus.freepascal.org/index.php/topic,43376.msg303582.html#msg303582 (https://forum.lazarus.freepascal.org/index.php/topic,43376.msg303582.html#msg303582)
#56. Selection Demo
Category: Graphics
A movable and resizeable selection, by furious programming.
https://forum.lazarus.freepascal.org/index.php/topic,43474.msg304454.html#msg304454 (https://forum.lazarus.freepascal.org/index.php/topic,43474.msg304454.html#msg304454)
#57. Sprite Picking and Moving
Category: Graphics
Hit Testing - a must learn topic for every graphics programmer, by Mr.Madguy.
https://forum.lazarus.freepascal.org/index.php/topic,36871.msg246309.html#msg246309 (https://forum.lazarus.freepascal.org/index.php/topic,36871.msg246309.html#msg246309)
#58. Dancing Balls
Category: Graphics
Balls that connect to each others, by rvk.
https://forum.lazarus.freepascal.org/index.php/topic,38511.msg262692.html#msg262692 (https://forum.lazarus.freepascal.org/index.php/topic,38511.msg262692.html#msg262692)
#59. FTP Connect
Category: Network
Requirement: Synapse (can be installed using OPM)
Demo showing how to connect to a FTP server, by wp.
https://forum.lazarus.freepascal.org/index.php/topic,47015.msg336047.html#msg336047 (https://forum.lazarus.freepascal.org/index.php/topic,47015.msg336047.html#msg336047)
#60. HTML to Text
Category: Network
Requirement: fasthtmlparser
Extract data from a webpage, by wp.
https://forum.lazarus.freepascal.org/index.php/topic,35980.msg239199.html#msg239199 (https://forum.lazarus.freepascal.org/index.php/topic,35980.msg239199.html#msg239199)
#61. Game Client and Server
Category: Network
Demo showing the basic for building client and server program, by rvk.
https://forum.lazarus.freepascal.org/index.php/topic,38866.msg266673.html#msg266673 (https://forum.lazarus.freepascal.org/index.php/topic,38866.msg266673.html#msg266673)
#62. Screenshot Capture
Category: Graphics
Screenshot capture and crop, by howardpc.
https://forum.lazarus.freepascal.org/index.php/topic,33138.msg214178.html#msg214178 (https://forum.lazarus.freepascal.org/index.php/topic,33138.msg214178.html#msg214178)
#63. Communicate Between 2 Programs
Category: General
This demo showing how to use simpleipc, by wp.
https://forum.lazarus.freepascal.org/index.php/topic,43489.msg304434.html#msg304434 (https://forum.lazarus.freepascal.org/index.php/topic,43489.msg304434.html#msg304434)
#64. Save & Restore StringGrid
Category: UI
You can easily save/load a grid’s content, by wp.
https://forum.lazarus.freepascal.org/index.php/topic,48241.msg347340.html#msg347340 (https://forum.lazarus.freepascal.org/index.php/topic,48241.msg347340.html#msg347340)
#65. StringGrid With Autosum Column
Category: UI
How to create column that can auto calculate row sum, by wp.
https://forum.lazarus.freepascal.org/index.php/topic,45816.msg324502.html#msg324502 (https://forum.lazarus.freepascal.org/index.php/topic,45816.msg324502.html#msg324502)
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Oh, wow, thats some list Handoko, some list !
And just scrolling through it, a very useful collection of things !
But too long and diverse for one page, would 65 extra entries swamp the Code Snippets page that Trev and minesadorada mention ?
I now think its a case of several new wiki pages with headings such as (taken from Handoko's list) -
General Programming Snippets
Graphics Snippets
UI Snippets
Android Snippets
....
Forum Snippets
....
etc and list those pages in the Code Snippets page. The term "Snippets" in the title indicating its a collection. And, maybe a "Forum Snippets" page where we can quickly link something interesting, maybe, hopefully, to later make a wiki page of ? is that step one ?
A lot of Handoko's links do point to content that is substantial enough to require its own dedicated page.
(I'm going to now have a sit and browse through all this links ....)
Davo
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Great work Handoko! In return for all your work, I just spent the last couple of hours creating the HowTo Demos Portal (https://wiki.freepascal.org/Portal:HowTo_Demos) in the Wiki using your content.
Note: I broke a few of the HowTos out of the General category and made a new category: File Handling.
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Thanx Handoko, Thanx Trev
Very helpful
Winni
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Great work Handoko!
+1
I second that. Thank you Handoko.
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When I was learning TAChart I ended up writing a wiki Treeview for better overview. But I never maintained it for lack of time. I dont know, maybe it can be of use as an idea or whatever.
https://wiki.lazarus.freepascal.org/TAChart_User_Guide
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+1 for kapibara
That looks nice.
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Nice idea and nice list Handoko.
I would certainly use such a resource.
It doesn't have to be perfect from day one, it can be an evolving resource.
You could then have a separate section here devoted to questions about using the code on the resource. Users refer to the example/code/app number and then state their question.
This would remove some of the randomness of questions throughout the sections.
Great work people.
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thanks @Handoko
thanks @Trev
very good
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Very well done Trev.
I note you say "that have been posted on the Free Pascal and Lazarus Forums". Is it your intention that that particular Portal list only forum content ?
For example, kapibara's TChart demo is mentioned under the Tutorials category, there is some cross over between Portals and Categories and new (or old) users may not see structure. Fortunately you mention several relevant categories on the new Portal page so new users can see the full range.
I wonder, if its a Forum only Portal, would it be better to include the word 'Forum' in the title ?
Davo
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I note you say "that have been posted on the Free Pascal and Lazarus Forums". Is it your intention that that particular Portal list only forum content ?
Yes, that was the intention as per Handoko's original post.
For example, kapibara's TChart demo is mentioned under the Tutorials category, there is some cross over between Portals and Categories and new (or old) users may not see structure. Fortunately you mention several relevant categories on the new Portal page so new users can see the full range.
Yes, I quite deliberately mentioned the Code, Code Snippets, Example programs and Tutorials categories so that anyone who reaches the HowTo Demos page can discover them too.
I wonder, if its a Forum only Portal, would it be better to include the word 'Forum' in the title ?
Been there, done that :) I originally had Forum in the title, but as time went by it didn't seem quite right somehow and so I settled on the current name. Given the number of Wiki labourers, I'm not too worried about the floodgates being opened to non-Forum demos or having to police that eventuality.
In other news, the various platform and topic portals will soon be appearing on the Wiki's main page to make it a lot easier for users, new and old, to:
* see more of what's available in the Wiki;
* locate Wiki information more easily;
* encourage new contributors and contributions to the Wiki.
The Linux (https://wiki.freepascal.org/Portal:Linux) and Windows (https://wiki.freepascal.org/Portal:Windows) Portals could do with some love as could the Linux Programming Tips (https://wiki.freepascal.org/Linux_Programming_Tips) and Windows Programmng Tips (https://wiki.freepascal.org/Windows_Programming_Tips) pages. Hint, hint ;D
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Been there, done that :) I originally had Forum in the title, but as time went by it didn't seem quite right somehow .....
Your call, you have put the effort in.
In other news, the various platform and topic portals will soon be appearing on the Wiki's main page to make it a lot easier ....
Main page ? good, as long as it keeps it reasonably short. The Documentation page is far too long and not organized in a new user focus. The links they need are certainly there but they are unlikely to find them. Whats needed is a "New User Start Here" that takes them to a small number of beginner suitable tutorials.
The Linux (https://wiki.freepascal.org/Portal:Linux) and Windows (https://wiki.freepascal.org/Portal:Windows) Portals could do with some love as could the Linux Programming Tips (https://wiki.freepascal.org/Linux_Programming_Tips) and Windows Programmng Tips (https://wiki.freepascal.org/Windows_Programming_Tips) pages. Hint, hint ;D
Yeah, probably. I don't tend to focus on platform specific pages, my code is cross platform so, when I hack into a wiki page (except the Installing pages I've done) I tend to write platform agnostic content with embedded notes about platform idiosyncrasies if necessary.
I have spent a fair bit of time following various links from the examples and Tutorials pages, have learnt heaps ! But notice a lot of out of date comments. Things like "If using the current Lazarus which is 0.9.2, ...." - In a lot of cases, the content is still correct but the message to new user is neglect. Sigh ....
Anyway, love the job you, Trev and Handoko have done here. A real step forward.
Davo
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The Documentation page is far too long and not organized in a new user focus. The links they need are certainly there but they are unlikely to find them. Whats needed is a "New User Start Here" that takes them to a small number of beginner suitable tutorials.
A New User Portal is an excellent idea! I do believe that most of the content is already available in the Wiki, just rather scattered and not easy to find.
Yeah, probably. I don't tend to focus on platform specific pages, my code is cross platform so, when I hack into a wiki page (except the Installing pages I've done) I tend to write platform agnostic content with embedded notes about platform idiosyncrasies if necessary.
I didn't mean to direct that at you personally ... sorry.
Anyway, love the job you, Trev and Handoko have done here. A real step forward.
Me and Trev are like one ;)
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Hello everyone.
First of all, I would like to congratulate Handoko and trev on the excellent research and cataloging and to kapibara for the organization of his documentation.
The Documentation page is far too long and not organized in a new user focus. The links they need are certainly there but they are unlikely to find them. Whats needed is a "New User Start Here" that takes them to a small number of beginner suitable tutorials.
A New User Portal is an excellent idea! I do believe that most of the content is already available in the Wiki, just rather scattered and not easy to find.
I would like to point out that a short time ago I opened a thread regarding support for new users.
https://forum.lazarus.freepascal.org/index.php/topic,48678.0.html
The two concepts could be combined into a single argument (since they are partly overlapping); This would limit fragmentation. In addition, the inexperienced user would be facilitated in finding the introductory material.
Otto.
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There is the excellent HTML help system already, so what extra value can a Wiki approach take?
I would suggest - a lot.
Here is the "official" help portal: file:///<lazarus_installdir>/lazarus/docs/index.html which is the canonical resource - and always up-to-date, but it is not task-oriented, and example source code is not always available.
The "Tools/Example Projects" is also a mine of coding information.
Beginners like example code to both get a kick-start and also learn the language by example, and for that, the Wiki is a useful and accessible resource.
The downside is of course, lax maintenance of the Wiki.
I started the Wiki category "Code Snippets" purely for my own benefit - often I would follow a forum topic and come across a really good solution which I thought could be lost among the static.
All I had to do was copy/paste the code into a new wiki page, and add "Category:Code Snippets" but being a typical programmer I got lazy and stopped after a while.
This new initiative looks like a real step forwards.