Introduction
Original AGauge control
AGauge
is a gauge control for WinForms create by A.J.Bauer using GDI+. The original code was published in "Code Project - A fast and performing gauge" The version that I published here is an improved version of AGauge
which contains the following changes.
Improvements
Dynamic Gauge Label and Gauge Range
Properties for gauge label (previously known as CapText
) and range are grouped into GaugeRanges
and GaugeLabels
which allow us to create any number of range and label as we wish. Range
and label
can be edited either from code or using the collection
editor from the properties window.
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("Gauge Ranges.")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
public AGaugeRangeCollection GaugeRanges { get { return _GaugeRanges; } }
private AGaugeRangeCollection _GaugeRanges;
[System.ComponentModel.Browsable(true),
System.ComponentModel.Category("AGauge"),
System.ComponentModel.Description("Gauge Labels.")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
public AGaugeLabelCollection GaugeLabels { get { return _GaugeLabels; } }
private AGaugeLabelCollection _GaugeLabels;
Besides, each label can use different Font
settings since label
is an instance of AGaugeLabel
.
Added NeedleType Enumeration
AGauge
control has 2 different types of needle design selectable from NeedleType
property. Type of NeedleType
property was changed from Int32
(0
or 1
) to enumeration type (NeedleType.Advance
or NeedleType.Simple
) to avoid invalid entry from user.
Events
Update ValueInRangeChangedEvent
ValueInRangeChangedDelegate
was changed to ValueInRangeChangedEvent
to allow multiple subscriptions. The event is changed to trigger only if value is entering or leaving a defined range. Besides, ValueInRangeChangedEventArgs
was updated to hold current range and gauge value.
[Description("This event is raised if the value is entering or leaving
defined range.")]
public event EventHandler<ValueInRangeChangedEventArgs> ValueInRangeChanged;
private void OnValueInRangeChanged(AGaugeRange range, Single value)
{
EventHandler<ValueInRangeChangedEventArgs> e = ValueInRangeChanged;
if (e != null) e(this, new ValueInRangeChangedEventArgs(range, value,
range.InRange));
}
public class ValueInRangeChangedEventArgs : EventArgs
{
public AGaugeRange Range { get; private set; }
public Single Value { get; private set; }
public bool InRange { get; private set; }
public ValueInRangeChangedEventArgs(AGaugeRange range, Single value,
bool inRange)
{
this.Range = range;
this.Value = value;
this.InRange = inRange;
}
}
Added ValueChangedEvent
ValueChanged
event is added to notify user whenever gauge value is updated. Note that attempting to set gauge value out of defined gauge range will not trigger this event.
[Description("This event is raised when gauge value changed.")]
public event EventHandler ValueChanged;
private void OnValueChanged()
{
EventHandler e = ValueChanged;
if (e != null) e(this, null);
}
License
This article, along with any associated source code and files, is licensed under The zlib/libpng License
History
- 28/08/2012: Initial release (Version 2.0.0)