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Labels under my bars in barchart?[SOLVED]
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Topic: Labels under my bars in barchart?[SOLVED] (Read 4845 times)
Robert W.B.
Sr. Member
Posts: 328
Love my Wife, My Kids and Lazarus/Freepascal.
Labels under my bars in barchart?[SOLVED]
«
on:
February 16, 2017, 02:35:44 am »
I have a barchart with bottom labels 1 2 3 4 5 6 7 automaticly created.
How can I set labels like, one two three instead of 1 2 3?
Thanks in advance
«
Last Edit: February 16, 2017, 03:19:00 pm by Bob the Swede
»
Logged
Rob
wp
Hero Member
Posts: 11858
Re: Labels under my bars in barchart?
«
Reply #1 on:
February 16, 2017, 09:46:34 am »
Do you know the related tutorial?
http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_BarSeries#Using_text_labels
The tutorial adds data via the datapoint editor. You probably add data to the series by calling the BarSeries' AddXY method. This method has an optional third parameter for data point labels:
Code: Pascal
[Select]
[+]
[-]
Chart1BarSeries1
.
AddXY
(
1
,
y_value1
,
'one'
)
;
Chart1BarSeries1
.
AddXY
(
2
,
y_value2
,
'two'
)
;
Chart1BarSeries1
.
AddXY
(
3
,
y_value3
,
'three'
)
;
// etc
Then, after adding all data set the Marks.Source of the BottomAxis to the ListSource of the BarSeries (this is where your data are stored), and set Marks.Style to smsLabel (you'll have to add TAChartUtils to "uses" for the compiler to find this identifier, or set the Marks.Style in ObjectInspector):
Code: Pascal
[Select]
[+]
[-]
uses
TAChartUtils
,
...
...
Chart1
.
BottomAxis
.
Marks
.
Source
:
=
Chart1BarSeries1
.
ListSource
;
Chart1
.
BottomAxis
.
Marks
.
Style
:
=
smsLabel
;
Now you should see the labels instead of the x values.
Logged
Robert W.B.
Sr. Member
Posts: 328
Love my Wife, My Kids and Lazarus/Freepascal.
Re: Labels under my bars in barchart?
«
Reply #2 on:
February 16, 2017, 01:49:39 pm »
Hi wp. I was into this solution but, I got External SIGSEGV in tacustomseries.pas
Any idea what might be wrong?
Logged
Rob
wp
Hero Member
Posts: 11858
Re: Labels under my bars in barchart?
«
Reply #3 on:
February 16, 2017, 02:03:54 pm »
No idea. Did you create the series? Double-click on the chart, select "Add" and pick the series type you want to add.
Logged
Robert W.B.
Sr. Member
Posts: 328
Love my Wife, My Kids and Lazarus/Freepascal.
Re: Labels under my bars in barchart?
«
Reply #4 on:
February 16, 2017, 02:24:15 pm »
Yes,the Barchartseries is created.
I try to set 7 string labels and the code is accepted but when in runmode I have got SIGSEGV!
for a:=1 to 7 do begin
Chart1BarSeries1.AddXY(a,a,IntToStr(mylabels[a]));
end;
Logged
Rob
Girlbrush
Jr. Member
Posts: 65
Re: Labels under my bars in barchart?
«
Reply #5 on:
February 16, 2017, 02:41:13 pm »
Code: Pascal
[Select]
[+]
[-]
for
a
:
=
1
to
7
do
begin
Chart1BarSeries1
.
AddXY
(
a
,
a
,
IntToStr
(
mylabels
[
a
]
)
)
;
end
;
My guess:
Substract 1 from a when used in your mylabels array (that runs from 0 to n).
Code: Pascal
[Select]
[+]
[-]
for
a
:
=
1
to
7
do
begin
Chart1BarSeries1
.
AddXY
(
a
,
a
,
IntToStr
(
mylabels
[
a
-
1
]
)
)
;
end
;
Logged
Getting back into programming after 8+ years.
wp
Hero Member
Posts: 11858
Re: Labels under my bars in barchart?
«
Reply #6 on:
February 16, 2017, 02:56:16 pm »
Why do you create the series label from the integer array mylabels? I thought you wanted words as labels.
Code: Pascal
[Select]
[+]
[-]
const
mylabels
:
array
[
1
..
7
]
of
string
=
(
'one'
,
'two'
,
'three'
,
'four'
,
'five'
,
'six'
,
'seven'
)
;
for
a
:
=
1
to
7
do
Chart1BarSeries1
.
AddXY
(
a
,
a
,
mylabels
[
a
]
)
;
«
Last Edit: February 16, 2017, 04:04:37 pm by wp
»
Logged
Robert W.B.
Sr. Member
Posts: 328
Love my Wife, My Kids and Lazarus/Freepascal.
Re: Labels under my bars in barchart?
«
Reply #7 on:
February 16, 2017, 03:18:38 pm »
Many thanks wp and Girlbrush.
Now I get it.
Have a nice weekend.
/Bob
Logged
Rob
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Labels under my bars in barchart?[SOLVED]
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