Rich text viewer

[petevick]

I want to display a Rich Text File. From an online search I'm lead to believe that either LazRichView or RichMemo will do the trick. I've tried installing RichMemo but it will not install, just a 'cannot install package' message. LazRichView did install, but for the life of me I cannot find any method to load/read an external file. I've found reference to the Delphi version which has a LoadRTF method, but that does not exist for Lazarus.

[AlexTP]

Related forum part
https://forum.lazarus.freepascal.org/index.php/board,71.0.html

[petevick]

Related forum part
https://forum.lazarus.freepascal.org/index.php/board,71.0.html

thanks for the reply, but my question related to the LazRichView component and specifically how to load an rtf file into it.

[wp]

I've tried installing RichMemo but it will not install, just a 'cannot install package' message.

Just tried this a few days ago and it worked flawlessly (Laz 2.2.0/FPC 3.2.2, RichMemo from OPM). Maybe I should draw your attention to the fact that RichMemo comes in two packages. The richmemopackage.lpk is the run-time package and cannot be installed. In the subfolder "ide" you find the richmemo_design.lpk designtime package - this is the one which must be installed. When you install the package from OPM (which may be a bit out-dated in comparison with the author's development version on github, though) you need not care about such details.

LazRichView did install, but for the life of me I cannot find any method to load/read an external file. I've found reference to the Delphi version which has a LoadRTF method, but that does not exist for Lazarus.

I seems you are right - I cannot find something like LoadFromFile either.

[balazsszekely]

IIRC there is a LoadRichText, or something similar:

Code: Pascal  [Select][+][-]

1. var
2.   FS: TFileStream;
3. begin
4.   FS := TFileStream.Create(PathToRTf, fmOpenRead or fmShareDenyNone);
5.   try
6.     RichMemo1.LoadRichText(FS);
7.   finally
8.     FS.Free
9.   end;
10. end;

[wp]

Yes, for RichMemo, but AFAICS not for RichView.

[petevick]

Just tried this a few days ago and it worked flawlessly (Laz 2.2.0/FPC 3.2.2, RichMemo from OPM). Maybe I should draw your attention to the fact that RichMemo comes in two packages. The richmemopackage.lpk is the run-time package and cannot be installed. In the subfolder "ide" you find the richmemo_design.lpk designtime package - this is the one which must be installed. When you install the package from OPM (which may be a bit out-dated in comparison with the author's development version on github, though) you need not care about such details.

I was installing it from the OPM, but both lpk packages give a "Cannot compile package" error, and like yourself I'm using Laz 2.2.0 and FPC 3.2.2. 

[wp]

I should read your signature. I am on Windows, you are on Linux...

Tried the same on Linux Mint 10.2 and confirm the issue now. I also tried the version on the author's github - same issue.

Since the non-compiling line is inside an {$IFDEF} I looked at the package options and found the define RMLCLTRUNK which is not active. After activating it I could compile both packages on Mint.

So, these are the steps how you could make it work for yourself:

• Open the richmemopackage.lpk in Lazarus ("Package" > "Open Package File")
• Select "Options" > "Compiler Options" > "Custom Options". Click "Defines..." and check the item RMLCLTRUNK in the checklistbox > "OK"
• Now you should be able to compile the richmemopackage.lpk.
• Finally load richmemo_design.lpk and install it (click "Use" > "Install")

[petevick]

• Finally load richmemo_design.lpk and install it (click "Use" > "Install")

It all went well until this last step, I'm not sure how/where you would 'load' the lpk, but the "Install" option was greyed out. I did manage to install it though via Package>Install/Uninstall packages.

That's brilliant work wp, thank you for that 

[petevick]

and as if by magic, I came across this in the wiki - https://wiki.freepascal.org/File:rmlcltrunkdefine.png

[wp]

• Finally load richmemo_design.lpk and install it (click "Use" > "Install")

It all went well until this last step, I'm not sure how/where you would 'load' the lpk

Well, maybe my description was too short here. Go to "Package" > "Open Package file". Navigate to the subfolder "ide" of the folder into which you had unzipped the RichMemo download. Select the file richmemo_design.lpk which must exist in this folder. Although not needed, it may be a good idea to check whether the design-time package compiles: Click "Compile". When ok, click on "Use" > "Install" finally.

[wp]

and as if by magic, I came across this in the wiki - https://wiki.freepascal.org/File:rmlcltrunkdefine.png

And the associated text is here: https://wiki.freepascal.org/RichMemo#2.1.0_.28trunk.2Flater.29