Selecting a Graph Type
Your most important choice about your chart is the type of graph that is used to represent your data. Chapter 6 Chart Types described the various graph and axis types supported by Objective Chart. The Wizard Demo sample application can help you or your end-user select the chart type that is most appropriate for the data.
Chart styles may be chosen by setting two main styles in the m_Style member of the display component. These styles are the graph type using the CX_GRAPH_XXXXX styles and the axis type using the CX_AXIS_XXXXX styles. These styles may be set using the SRGraphStyle::SetGraphStyle() and SRGraphStyle::SetAxisStyle() functions.
For example, the following code segment creates a display component that displays a pie chart that covers the entire screen.
SRGraphDisplay *pD=new SRGraphDisplay;
pD->GetStyle()->SetGraphStyle(CX_GRAPH_PIE);
pD->GetStyle()->SetAxisStyle(CX_AXIS_AUTOMATIC);
pD->SetMeasurement(SRGraphComponent::PERCENT);
pD->SetRect(-1,-1,-1,-1);
m_Graph.AddComponent(pD);
The tables below list the standard graph and axis styles in Objective Chart. The third table shows which axis types are supported for the various graph types.
|
Graph Style |
Description |
|
CX_GRAPH_NONE |
No style defined |
|
CX_GRAPH_LINE |
Simple line plot with wigets |
|
CX_GRAPH_LINEONLY |
Line only (no wigets) |
|
CX_GRAPH_AREA |
Area under a curve |
|
CX_GRAPH_STEP |
Step chart |
|
CX_GRAPH_STEPLO |
Step chart — line only |
|
CX_GRAPH_VBAR |
Simple vertical bar chart |
|
CX_GRAPH_HBAR |
Simple horizontal bar chart |
|
CX_GRAPH_STACK_VBAR |
2D stacked vertical bars (not summed) |
|
CX_GRAPH_STACK_HBAR |
2D stacked horizontal bars (not summed) |
|
CX_GRAPH_EX_VBAR |
Extended VBar (Pseudo 3D) |
|
CX_GRAPH_EX_HBAR |
Extended HBar (pseudo 3D horizontal bars) |
|
CX_GRAPH_STRATA |
Strata graph (summed) |
|
CX_GRAPH_STRATAVBAR |
Strata vertical bar (one index per bar) |
|
CX_GRAPH_STRATAHBAR |
Strata horizontal bar (one index per bar) |
|
CX_GRAPH_STRATAVBARG |
Strata vertical bar (one group per bar) |
|
CX_GRAPH_STRATAHBARG |
Strata horizontal bar (one group per bar) |
|
CX_GRAPH_STOCK |
Highs, lows, and now (or close) |
|
CX_GRAPH_AREASTOCK |
Area style stock quote (hi-low) |
|
CX_GRAPH_CANDLE |
Candle chart style |
|
CX_GRAPH_HILO_OPENCLOSE |
Hi-Low Open Close chart |
|
CX_GRAPH_FREESTYLE |
Classic graph with free style objects |
|
CX_GRAPH_PIE |
Pie chart |
|
CX_GRAPH_ISO_PIE |
3D pie chart |
|
CX_GRAPH_ISO_BAR |
3D Manhattan graph |
|
CX_GRAPH_ISO_AREA |
3D Rooftop graph |
|
CX_GRAPH_RIBBON |
Ribbon graphs are rooftop graphs without sides or ends. |
|
CX_GRAPH_XYSCATTERA |
Scatter plot using alternate X and Y values |
|
CX_GRAPH_XYSCATTERG |
Scatter plot: even groups = Xs and odd groups = Ys |
|
CX_GRAPH_XYSCATTERI |
Scatter plot: even indices = Xs and odd indices = Ys |
|
CX_GRAPH_XYSCATTERA_EX |
Scatter charts with log/linear axis differentiation |
|
CX_GRAPH_XYSCATTERG_EX |
Scatter charts with log/linear axis differentiation |
|
CX_GRAPH_XYSCATTERI_EX |
Scatter charts with log/linear axis differentiation |
|
CX_GRAPH_BUBBLE_R |
Bubble chart, radius proportional to size variable |
|
CX_GRAPH_BUBBLE_A |
Bubble chart, area proportional to size variable |
|
CX_GRAPH_VECTOR_E |
Vector chart, angle+magnitude, tail at x-y position |
|
CX_GRAPH_VECTOR_C |
Vector chart, angle+magnitude, midpoint at x-y position |
|
CX_GRAPH_VECTOR_G |
Vector chart, two end points |
|
CX_GRAPH_GANTT |
Gantt chart |
|
CX_GRAPH_POLAR |
Polar chart with phase and magnitude |
|
CX_GRAPH_AREAPOLAR |
Polar chart with filled areas |
|
CX_GRAPH_WEB |
Web charts are polar or radar graphs |
|
CX_GRAPH_AREAWEB |
Web chart with filled areas |
|
CX_GRAPH_HISTOGRAM |
Histogram or frequency spectrum1 |
|
CX_GRAPH_OSCILLISCOPE |
Dynamic multiple plots1 |
|
CX_GRAPH_TIMESPAN |
Horizontal time-span bars1 |
|
CX_GRAPH_USER |
User styles are in the range 00c00000 to 00ff0000; all other values are .reserved |
