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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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TAChart: source code for chart background tutorial
git-svn-id: trunk@46154 -
This commit is contained in:
wp
parent
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commit
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4
.gitattributes
vendored
4
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vendored
@ -3745,6 +3745,10 @@ components/tachart/test/SourcesTest.pas svneol=native#text/pascal
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components/tachart/test/UtilsTest.pas svneol=native#text/pascal
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components/tachart/test/UtilsTest.pas svneol=native#text/pascal
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components/tachart/test/test.lpi svneol=native#text/plain
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components/tachart/test/test.lpi svneol=native#text/plain
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components/tachart/test/test.lpr svneol=native#text/pascal
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components/tachart/test/test.lpr svneol=native#text/pascal
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components/tachart/tutorials/background/backimage.lpi svneol=native#text/plain
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components/tachart/tutorials/background/backimage.lpr svneol=native#text/plain
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components/tachart/tutorials/background/main.lfm svneol=native#text/plain
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components/tachart/tutorials/background/main.pas svneol=native#text/plain
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components/tachart/tutorials/bar_series/horizontal_bars/project1.lpi svneol=native#text/pascal
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components/tachart/tutorials/bar_series/horizontal_bars/project1.lpi svneol=native#text/pascal
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components/tachart/tutorials/bar_series/horizontal_bars/project1.lpr svneol=native#text/pascal
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components/tachart/tutorials/bar_series/horizontal_bars/project1.lpr svneol=native#text/pascal
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components/tachart/tutorials/bar_series/horizontal_bars/unit1.lfm svneol=native#text/pascal
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components/tachart/tutorials/bar_series/horizontal_bars/unit1.lfm svneol=native#text/pascal
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113
components/tachart/tutorials/background/backimage.lpi
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components/tachart/tutorials/background/backimage.lpi
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<?xml version="1.0" encoding="UTF-8"?>
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<CONFIG>
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<ProjectOptions>
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<Version Value="9"/>
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<PathDelim Value="\"/>
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<General>
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<SessionStorage Value="InProjectDir"/>
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<MainUnit Value="0"/>
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<Title Value="backimage"/>
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<ResourceType Value="res"/>
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<UseXPManifest Value="True"/>
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</General>
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<i18n>
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<EnableI18N LFM="False"/>
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</i18n>
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<VersionInfo>
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<StringTable ProductVersion=""/>
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</VersionInfo>
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<BuildModes Count="2">
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<Item1 Name="Debug" Default="True"/>
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<Item2 Name="Release">
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<CompilerOptions>
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<Version Value="11"/>
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<PathDelim Value="\"/>
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<Target>
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<Filename Value="backimage"/>
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</Target>
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<SearchPaths>
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<IncludeFiles Value="$(ProjOutDir)"/>
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</SearchPaths>
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<CodeGeneration>
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<SmartLinkUnit Value="True"/>
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</CodeGeneration>
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<Linking>
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<Debugging>
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<StripSymbols Value="True"/>
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</Debugging>
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<LinkSmart Value="True"/>
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<Options>
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<Win32>
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<GraphicApplication Value="True"/>
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</Win32>
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</Options>
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</Linking>
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</CompilerOptions>
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</Item2>
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</BuildModes>
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<PublishOptions>
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<Version Value="2"/>
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</PublishOptions>
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<RunParams>
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<local>
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<FormatVersion Value="1"/>
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</local>
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</RunParams>
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<RequiredPackages Count="2">
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<Item1>
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<PackageName Value="TAChartLazarusPkg"/>
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</Item1>
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<Item2>
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<PackageName Value="LCL"/>
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</Item2>
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</RequiredPackages>
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<Units Count="2">
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<Unit0>
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<Filename Value="backimage.lpr"/>
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<IsPartOfProject Value="True"/>
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<UnitName Value="backimage"/>
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</Unit0>
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<Unit1>
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<Filename Value="main.pas"/>
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<IsPartOfProject Value="True"/>
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<ComponentName Value="Form1"/>
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<HasResources Value="True"/>
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<ResourceBaseClass Value="Form"/>
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<UnitName Value="main"/>
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</Unit1>
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</Units>
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</ProjectOptions>
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<CompilerOptions>
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<Version Value="11"/>
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<PathDelim Value="\"/>
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<SearchPaths>
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<IncludeFiles Value="$(ProjOutDir)"/>
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</SearchPaths>
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<CodeGeneration>
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<SmartLinkUnit Value="True"/>
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</CodeGeneration>
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<Linking>
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<Debugging>
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<DebugInfoType Value="dsDwarf2Set"/>
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</Debugging>
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<Options>
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<Win32>
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<GraphicApplication Value="True"/>
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</Win32>
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</Options>
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</Linking>
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</CompilerOptions>
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<Debugging>
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<Exceptions Count="3">
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<Item1>
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<Name Value="EAbort"/>
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</Item1>
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<Item2>
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<Name Value="ECodetoolError"/>
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</Item2>
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<Item3>
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<Name Value="EFOpenError"/>
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</Item3>
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</Exceptions>
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</Debugging>
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</CONFIG>
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21
components/tachart/tutorials/background/backimage.lpr
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21
components/tachart/tutorials/background/backimage.lpr
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program backimage;
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{$mode objfpc}{$H+}
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uses
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{$IFDEF UNIX}{$IFDEF UseCThreads}
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cthreads,
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{$ENDIF}{$ENDIF}
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Interfaces, // this includes the LCL widgetset
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Forms, main, tachartlazaruspkg
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{ you can add units after this };
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{$R *.res}
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begin
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RequireDerivedFormResource := True;
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Application.Initialize;
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Application.CreateForm(TForm1, Form1);
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Application.Run;
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end.
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76
components/tachart/tutorials/background/main.lfm
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76
components/tachart/tutorials/background/main.lfm
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object Form1: TForm1
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Left = 340
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Height = 300
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Top = 154
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Width = 400
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Caption = 'Form1'
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ClientHeight = 300
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ClientWidth = 400
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OnCreate = FormCreate
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OnDestroy = FormDestroy
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LCLVersion = '1.3'
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object Chart1: TChart
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Left = 0
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Height = 300
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Top = 0
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Width = 400
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AxisList = <
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item
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Grid.Color = clSkyBlue
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Grid.Visible = False
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Marks.Format = '%.0n'
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Marks.Style = smsCustom
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Minors = <>
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Title.LabelFont.Height = -16
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Title.LabelFont.Orientation = 900
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Title.LabelFont.Style = [fsBold]
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Title.Visible = True
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Title.Caption = 'Downloads per year'
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end
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item
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Grid.Visible = False
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Alignment = calBottom
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Minors = <>
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Title.LabelFont.Height = -16
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Title.LabelFont.Style = [fsBold]
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Title.Visible = True
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Title.Caption = 'Year'
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end>
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Foot.Brush.Color = clBtnFace
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Foot.Font.Color = clBlue
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Title.Brush.Color = clBtnFace
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Title.Brush.Style = bsClear
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Title.Font.Color = clNavy
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Title.Font.Height = -17
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Title.Font.Style = [fsBold]
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Title.Text.Strings = (
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'Lazarus Downloads'
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)
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Title.Visible = True
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OnBeforeDrawBackground = Chart1BeforeDrawBackground
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OnBeforeDrawBackWall = Chart1BeforeDrawBackWall
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Align = alClient
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ParentColor = False
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object Chart1BarSeries1: TBarSeries
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Shadow.Color = clNavy
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Shadow.OffsetX = 4
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BarBrush.Color = clSkyBlue
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Source = ListChartSource1
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end
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end
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object ListChartSource1: TListChartSource
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DataPoints.Strings = (
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'2005|53299|?|'
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'2006|119613|?|'
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'2007|158060|?|'
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'2008|218915|?|'
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'2009|190567|?|'
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'2010|230108|?|'
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'2011|267858|?|'
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'2012|298335|?|'
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'2013|280586|?|'
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)
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left = 120
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top = 56
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end
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end
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73
components/tachart/tutorials/background/main.pas
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73
components/tachart/tutorials/background/main.pas
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unit main;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, FileUtil, TAGraph, TASeries, TASources, Forms, Controls,
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Graphics, Dialogs;
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type
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{ TForm1 }
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TForm1 = class(TForm)
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Chart1: TChart;
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Chart1BarSeries1: TBarSeries;
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ListChartSource1: TListChartSource;
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procedure Chart1BeforeDrawBackground(ASender: TChart; ACanvas: TCanvas;
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const ARect: TRect; var ADoDefaultDrawing: Boolean);
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procedure Chart1BeforeDrawBackWall(ASender: TChart; ACanvas: TCanvas;
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const ARect: TRect; var ADoDefaultDrawing: Boolean);
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procedure FormCreate(Sender: TObject);
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procedure FormDestroy(Sender: TObject);
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private
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{ private declarations }
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FBackImage: TPicture;
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public
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{ public declarations }
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end;
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var
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Form1: TForm1;
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implementation
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{$R *.lfm}
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//{$R splash_logo.res}
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{ TForm1 }
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procedure TForm1.FormCreate(Sender: TObject);
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begin
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FBackImage := TPicture.Create;
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FBackImage.LoadFromFile('..\..\..\..\images\splash_logo.png');
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// above path assumes standard Lazarus installation
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// or, use resources:
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//FBackImage.LoadFromResourceName(HInstance, 'splash_logo');
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// Don't forget to active the "{$R" directive above.
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end;
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procedure TForm1.Chart1BeforeDrawBackWall(ASender: TChart; ACanvas: TCanvas;
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const ARect: TRect; var ADoDefaultDrawing: Boolean);
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begin
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ACanvas.StretchDraw(ARect, FBackImage.Graphic);
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ADoDefaultDrawing := false;
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end;
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procedure TForm1.Chart1BeforeDrawBackground(ASender: TChart; ACanvas: TCanvas;
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const ARect: TRect; var ADoDefaultDrawing: Boolean);
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begin
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ACanvas.GradientFill(ARect, clSkyBlue, clWhite, gdVertical);
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ADoDefaultDrawing := false;
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end;
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procedure TForm1.FormDestroy(Sender: TObject);
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begin
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FBackImage.Free;
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end;
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end.
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@ -50,9 +50,24 @@ topics:
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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folder "bar_series"
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folder "bar_series"
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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tutorial
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tutorials
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http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_BarSeries
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http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_BarSeries
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http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_Stacked_BarSeries
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topics
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topics
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- multiple bar series arranged side-by-side
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- multiple bar series arranged side-by-side
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- stacked bar series
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- TChartStyle
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- TRandomChartSource
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- TRandomChartSource
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--------------------------------------------------------------------------------
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folder "background"
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--------------------------------------------------------------------------------
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tutorial
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http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_Background_design
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topics
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- events used by TChart
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- user-drawn chart backgrounds: entire background, chart area ("back wall") only
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- transparency of bar series
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- enter data at design-time
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