The following demonstrates your first ProEssentials VCL Delphi Chart implementation. Though first...
- See the new v8 demo (only 15 meg and uninstalls no problem.)
- Charting Demo with three EXEs based on WPF, WinForm and native DLL.
- Size, Shape, Right Click, Export, Zoom (especially date and log scales), Pan, and Rotate.
- Study the code to discover the ease of use.
- Your company, team, vendors, and end-users deserve the best.
Installing into Delphi is pointing Delphi to the package file gigasoft.dpk.
When running the
ProEssentials setup, the setup program installs the
ProEssentials DLL into system32 or SysWow64 on 64 bit systems. It also
installs the ProEssentials VCL interfaces into C:\ProEssentials8\Delphi.
Your relevant files are:
|ProEssentials Pro DLL|
||Delphi Package |
Constants and Declarations|
||Scientific Graph Object|
||3D Scientific Graph Object|
||Pie Chart Object|
|ProEssentials Standard DLL
After setup completes, use the Delphi menus File / Close All and then File / Open to open
the file "GIGASOFT.DPROJ" found in
the C:\ProEssentials8\Delphi directory. You
will see a project pane as shown to the left. Right click near the top "gigasoft.bpl" and select Install. The PAS interfaces are compiled and ProEssentials components installed
into the "Additional" tab. We provide the PAS source incase you want to tinker with the interfaces.
After the components are
installed into the Delphi IDE, use the File / Close All menu item and save the "Gigasoft"
package when prompted.
Use the File / New
menu item to create a new VCL Forms Application project.
Use the Tools
/ Options... menu to open the "Delphi Options" Dialog as shown
to the left. Add "C:\ProEssentials8\Delphi"
to the "Library path" field and select
Repeat the library path setting for 64-bit Windows Platform if 64 bit is of interest.
the PEGraph control from the Additional ToolBox and then click and
drag a rectangle selection on Form1's canvas. Size the vcl chart control as needed.
The adjacent image shows what you see. This
represents the default state of a ProEssentials Graph.
The default state
has one subset with four data points. In the course of constructing your
own charts, you'll set the properties Subsets
and Points which define the quantity of
data your chart will hold. You'll then pass data via the YData[subset,
point] two dimensional property array. The following section shows
example code of passing data. Note, if we were constructing a Scientific
Graph (PESGraph1), we'd also set XData[subset, point].
ProEssentials uses the
terms Subsets and Points but you can think of these as Rows and Columns.
Passing data is as simple as filling each Subset with Points worth of
Enter the code as shown below. Try to write a few lines that use enums to see Delphi's intellisense. For example typing PEGraph.PlottingMethod : should prompt the ePlottingMethod enum. If this does not work, or Pegvcl and PEGraph1 is not recognized, the Library Path setting set above likely had a mistake.
Object Inspector to add the TForm1 FormShow event handler to the project.
Double clicking OnShow will auto generate this handler.
PEGraph1.MainTitle := 'Hello World';
PEGraph1.SubTitle := '';
PEGraph1.Subsets := 2;
PEGraph1.Points := 6;
PEGraph1.YData[0, 0] := 10; PEGraph1.YData[0, 1] := 30;
PEGraph1.YData[0, 2] := 20; PEGraph1.YData[0, 3] := 40;
PEGraph1.YData[0, 4] := 30; PEGraph1.YData[0, 5] := 50;
PEGraph1.YData[1, 0] := 15; PEGraph1.YData[1, 1] := 63;
PEGraph1.YData[1, 2] := 74; PEGraph1.YData[1, 3] := 54;
PEGraph1.YData[1, 4] := 25; PEGraph1.YData[1, 5] := 34;
PEGraph1.PointLabels := 'Jan'; PEGraph1.PointLabels := 'Feb';
PEGraph1.PointLabels := 'Mar'; PEGraph1.PointLabels := 'Apr';
PEGraph1.PointLabels := 'May'; PEGraph1.PointLabels := 'June';
PEGraph1.SubsetLabels := 'For .Net Framework';
PEGraph1.SubsetLabels := 'or MFC, ActiveX, VCL';
PEGraph1.YAxisLabel := 'Simple Quality Rendering';
PEGraph1.SubsetColors := PEGraph1.PEargb(60, 0, 180, 0);
PEGraph1.SubsetColors := PEGraph1.PEargb(180, 0, 0, 130);
PEGraph1.BitmapGradientMode := false;
PEGraph1.QuickStyle := gLightShadow;
PEGraph1.GraphPlusTable := gGraphPlusTable;
PEGraph1.DataPrecision := gNoDecimals;
PEGraph1.LabelBold := true;
PEGraph1.PlottingMethod := gBar;
PEGraph1.GradientBars := 8;
PEGraph1.BarGlassEffect := true;
PEGraph1.LegendLocation := gLegendLeft;
PEGraph1.DataShadows := gWithThreeD;
PEGraph1.FontSize := gLarge;
PEGraph1.PrepareImages := true;
PEGraph1.CacheBmp := true;
PEGraph1.RenderEngine := gDirect2D;
PEGraph1.AntiAliasGraphics := true;
PEGraph1.AntiAliasText := true;
PEGraph1.AllowDataHotSpots := true;
PEGraph1.PEactions := gReinitAndReset;
MainTitle and SubTitle are set first. Note that setting
SubTitle to an empty string hides the subtitle.Subsets and Points define the amount of data
you'll be passing.
Next, we pass some random data
into the YData[s,p] two dimensional property
PointLabels sets the first data point label located below axis.
SubsetLabels sets the first subset label.
Next, we set various
other properties controlling visual aspects, and enable flicker free updates with PrepareImages.
Finally PEactions is set to gReinitAndReset which tells ProEssentials to initialize and resetimage the image, in other words, you're done setting
Your code window will look similar to below...
Run your project and you'll see the resulting form.
Congratulations, you've just completed your first Delphi / ProEssentials implementation.
Complete online technical reference to the ProEssentials
product. The .NET Reference is the best mechanism
to navigate the large quantity of properties and features.
Walk-Throughs of charting in VB.NET, C#.NET, ASP, VC,
VB6, and Delphi get you started quickly.
more about Delphi Charts, see Chapter 4
Thank you for researching. Call, email and let's talk charting.