PlotPanel: what changed

Revision 1 to 2. Removed lines have a minus sign; added lines have a plus sign.

Old	New		Line
1	1		> Warning: Currently, PlotPanel is not in active development and is maintained for compatibility only. Please consider using [[TAChart documentation\|Functional series]] of [[TAChart]] package instead.
2	2
3	3		## Plotpanel
4	4
5	5		PlotPanel is a component for Lazarus to replace (more or less) the TChart component. With some modification it can also be used with Kylix, Delphi 5, 6 or 7.
6	6
7	7		With PlotPanel you can draw line- , dot- and bar-graphs. Animated graphs are also possible.
8	8
9	9		This software is presented as is, without any written warranty. So use the software at your own risk.
10	10
11	11		### Screenshot
12	12
13		-	~~<figure>~~
14		-	~~<img src="Plotpanel2.png" title="Plotpanel2.png" />~~
15		-	~~<figcaption>Plotpanel2.png</figcaption>~~
16		-	~~</figure>~~
	13	+	![](/wiki-images/2/24/Plotpanel2.png)
17	14
18	15		## Installation
19	16
20	17		To Install the PlotPanel component in Lazarus you have to do the following:
21	18
22	19		- Download the PlotPanelpackage (plotpanel.zip) from: <http://science4all.nl/?Programming:MICAM:Lazarus> or from [Lazarus CCR SourceForge site](http://sourceforge.net/project/showfiles.php?group_id=92177&package_id=181065).
23	20		- Unzip plotpanel.zip in a directory of your choice.
24	21		- Start Lazarus
25	22		- Perform the necessairy actions to intall the package (see [[Install Packages]]).
26	23
27	24		After you have done that all, there must be a new Tab in the component palet with the name "Extra". You can use the Plotpanel now
28	25
29	26		Run the PlotPanelDemo to explore the features of PlotPanel. N.B. You can try PlotPanel without installing the component by running TryPlotPanel!
30	27
31	28		'''There was a problem with Plotpanel in Lazarus 0.9.28.x
32	29
33	30		On my website (http://science4all.nl/?Programming:MICAM:Lazarus) you can find the updated version: PlotPanel-0.97
34	31
35	32		## Description of the PlotPanel component
36	33
37	34		This is a very rude description of the component. See the examples for an explanation of how to use the component. The PlotPanel component is derived from the TCustomPanel-component. To this Panel plotting capabilities are added.
38	35
39	36		## Properties inherited from TCustomPanel
40	37
41	38
42	39		Align, Anchors, Autosize, BevelInner / Outer / Width
43	40
44	41		Borderspacing, BorderStyle, Borderwidth
45	42
46	43		Color is the color of the border of the plot
47	44
48	45		Constraints, Cursor, Dragmode, Enabled
49	46
50	47		Font is the font of the title of the plot
51	48
52	49		Height, HelpContext, HelpKeyword, HelpType, Hint
53	50
54	51		Left, Name, ParenColor, Parentfont, ParentShowHint
55	52
56	53		PopupMenu, ShowHint, TabOrder, TabStop
57	54
58	55		Tag, Top, Visible, Width
59	56
60	57		## The following properties are added
61	58
62	59
63	60		BackColorThis is the background color of the plotting area
64	61
65	62		GridColorWhen you make this the same as Backcolor, the grid is invisible
66	63
67	64		LayerOptionFor easy plotting of a single layer this can be set to False. It is not possible to set this to True directly (see methods)
68	65
69	66		Margin The width of the border of the plot in pixels
70	67
71	68		PlotMode Three plotmodes are possible: pmBar, pmLine and pmDot
72	69
73	70		PlotPen Properties of the plotting pen. If LayerOption is False, then all sub-properties can be set. If LayerOption is True, then information about the plotting pen is transferred via the LayerOptions method (methods)
74	71
75	72		Title The Title is at the top center of the plot and uses the Font property
76	73
77	74		PlotBMP This is a bitmap holding the whole graph (see demo for its use)
78	75
79	76		The X-axis properties:
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81	78
82	79		XLabel Label at the X-axis
83	80
84	81		XMarks When True, the X-axis has marks
85	82
86	83		XMarksFont Font used for the XMarks
87	84
88	85		XMarksInterval Interval between to lines in the grid (applies for linear scales only)
89	86
90	87		XMax Maximum value of X that is visible
91	88
92	89		XMinMinimal value of X that is visible
93	90
94	91		XScaleLogWhen TRUE the scale is logarithmic (the interval is determined by the component)
95	92
96	93		For the Y-axis the same applies.
97	94
98	95		## Methods:
99	96
100	97		AddXY(X,Y:Extended)
101	98
102	99		` With this method you can add points (or lines) to the plot`\
103	100		` Example`\
104	101		` for i:= -10 to 10 do`\
105	102		` PlotPanel1.AddXY(i,i*i)`\
106	103		` This plots a parbola .The line is plotted with the PlotPen properties`\
107	104		` Note you can only plot a single layer.`
108	105
109	106		AddXY(X,Y:Extended, Color:Tcolor,Layer:Integer)
110	107
111	108		` With this method it is possible to plot up to 8 lines in different colors,`\
112	109		` plotmodes and penwidths (see LayerOptions how to set linewidth and plotmodes)`
113	110
114	111		LayerOptions(Layer:Integer;PlotMode:TPlotMode;PenWidth:Integer)
115	112
116	113		` Every Layer can use a different Plotmode and PenWidth`\
117	114		` When you call this method LayerOPtion will be set TRUE. When you want`\
118	115		` to use a single Layer again you have to set LayerOption False!`
119	116
120	117		Autoscale(Layer:Integer)
121	118
122	119		` With this method you can adjust the size of the plot automaticly`
123	120
124	121		ClearData
125	122
126	123		` Clears the data on the plot.`
127	124
128	125		ConvertS2W(x,y: Extended; var WX,WY : Extended)
129	126
130	127		` Converts the screen-coordinates in X,Y to the real coordinates WX,WY. When`\
131	128		` X and Y are out of bounds, the function returns False, otherwise True`
132	129
133	130		Freeze(Boolean)
134	131
135	132		` When Freeze(True) is executed all plotting is done on a invisible bitmap.`\
136	133		` After a Freeze(False) the whole plot is displayed. This produces flicker-free`\
137	134		` animations.`
138	135
139	136		HideLayer(Layer:Integer)
140	137
141	138		` Use this to hide a single layer in the plot`
142	139
143	140		UnHideLayer(Layer:Integer)
144	141
145	142		` Shows the hidden layer again`\
146	143		` N.B. When you add points to a hidden layer, the old layer is deleted and the`\
147	144		` new points are the only points in this layer!`
148	145
149	146		Paint
150	147
151	148		` Repaints the whole Graph (is done automaticly by the system when necessairy)`
152	149
153	150		Marien van Westen
154	151
155	152		---
156	153		From the Free Pascal wiki, page "PlotPanel", as it stood on 2016-07-18 after a change by Arent, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).
157	154		Category: Charting
158	155		Category: Components
159	156		Category: Graphics

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