?
Solved

Problem setting StringGrid Color

Posted on 1997-04-08
7
Medium Priority
?
380 Views
Last Modified: 2012-05-04
I'm having a prboblem setting StringGrid's color to anything but one of the solid system colors, clAqua thru clYellow.  My  video is set for 256 colors and works fine.
There is no problem setting all 256 colors in other components including DrawGrid and DBGrid. What's different about the StringGrid component? Does it use a different pallette or limit the system  pallette?

I'm attempting to use the color dialog to set the color. It should work since its color property is of type TColor which is the same as stringgrid's color property. (When I set my video driver to 16-bit color, stringgrid color work ok).

Thanks,
Jerry G.
0
Comment
Question by:jgrant101
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 2

Expert Comment

by:javiertb
ID: 1335247
How do you select your DBGrid among 256 colors?
0
 

Author Comment

by:jgrant101
ID: 1335248
Edited text of question
0
 

Author Comment

by:jgrant101
ID: 1335249
javiertb,
You asked how I change the DBGrid's color to one of 256. (Admittedly, I did not check all 256 colors).I use a color dialog control and select a color which I then use to set the DBGrid's color property.  It seems that the stringgrid control either uses a different pallette or limits the system pallette.

Thanks for your help
Jerry G.
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 2

Accepted Solution

by:
javiertb earned 300 total points
ID: 1335250
If you want to get 256 colors to chose from for your component, you'll have to deal with the API functions related to palette creation, manipulation and so on.
0
 

Author Comment

by:jgrant101
ID: 1335251
"If you want to get 256 colors to chose from for your component, you'll have to deal with the API functions related to palette creation, manipulation and so on."

I don't agree with this. Why can I set the color of a DBGrid or a DrawGrid to pastel yellow (color := $A8FFFF) for example, but not the StringGrid?  What's different about the stringgrid? I looked at the VCL souce code but could not find the difference.

Thanks for your help,
Jerry G.
0
 
LVL 2

Expert Comment

by:javiertb
ID: 1335252
Here you have the answer, hope this help:

TCustomGrid defines the FixedColor property and assumes that any code draws the fixed areas will use this propery. TDrawGrid and TStringGrid does this. However, TDBGrid (TCustomDBGrid, actually) defines another property called TitleColor and uses this when drawing. Unfortunately this property is defined as protected making it unavailable for component users at both design and run-time.

The solution is to derive your own component and use this instead of TDBGrid.The following unit does this:


unit Dbgridfx;

interface

uses
  SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, Grids, DBGrids;

type
  TDBGridFix = class(TDBGrid)
  private
    { Private declarations }
    procedure SetFixedFixedColor(Value: TColor);
    function  GetFixedFixedColor: TColor;
  published
    { Published declarations }
    property FixedColor: TColor read GetFixedFixedColor write SetFixedFixedColor default clBtnFace;
  end;

procedure Register;

implementation

procedure TDBGridFix.SetFixedFixedColor(Value: TColor);
begin
  inherited TitleColor := Value;
  inherited FixedColor := Value; { Not really needed, just to be on the safe side }
end;

function TDBGridFix.GetFixedFixedColor: TColor;
begin
  Result := inherited TitleColor;
end;

procedure Register;
begin
  RegisterComponents('Data Access', [TDBGridFix]);
end;

end.

Regards,
Javi
0
 

Author Comment

by:jgrant101
ID: 1335253
You are missing my point. I'm having trouble setting StringGrid's colors. DBGrid and DrawGrid colors can be set as expected.  Your response was to create a new component based on TDBGrid.

Moreover, the problem exists with any row or cell, not just the fixed areas.

Any other suggestions?


0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…
Suggested Courses

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question