/// <summary>
/// Find the ideal size to fit all the commands inside.
/// </summary>
/// <param name="states">Collection of additional state for commands.</param>
/// <param name="details">Lookup interface for calculations.</param>
/// <returns>Bounding rectangle covering all commands.</returns>
public Rectangle FindIdealSize(CommandStateCollection states,
ICommandDetails details)
{
// Peform layout of commands
Rectangle rectLayout = InternalLayoutCommands(states, details, true);
// Track total width or height required
int total = 0;
// Process all commands
for (int i = 0; i < _states.Count; i++)
{
CommandState state = _states[i];
// Add the size it needs for drawing in direction
total += WithFlowLength(state.DrawRect.Size);
}
// Modify the return rectangle with calculated total
if (_details.Direction == LayoutDirection.Horizontal)
{
rectLayout.Width = total;
}
else
{
rectLayout.Height = total;
}
// Clear out any temporary working values
ClearDown();
// Peform layout of commands
return(rectLayout);
}
/// <summary>
/// Perform sizing and positioning of commands.
/// </summary>
/// <param name="states">Collection of additional state for commands.</param>
/// <param name="details">Lookup interface for calculations.</param>
/// <returns>Bounding rectangle covering all commands.</returns>
public Rectangle LayoutCommands(CommandStateCollection states,
ICommandDetails details)
{
// Peform layout of commands
Rectangle rectLayout = InternalLayoutCommands(states, details, false);
// Clear out any temporary working values
ClearDown();
return(rectLayout);
}
private void Prepare(Graphics g,
CommandStateCollection states,
ICommandDetails details,
bool findIdealSize)
{
// Cache useful information
_states = states;
_details = details;
// Initialize simple working values
_maximumTangent = 0;
_finished = false;
// If try to find ideal size then give it unlimited space
if (findIdealSize)
{
_layoutRect = new Rectangle(0, 0, MAXIMUM, MAXIMUM);
}
else
{
_layoutRect = _details.LayoutRect;
}
// Starting position depends on orientation
if (_details.Direction == LayoutDirection.Horizontal)
{
_leftSpace = _layoutRect.Left;
}
else
{
_leftSpace = _layoutRect.Top;
}
// Amount of free space to use depends on orientation
_freeSpace = WithFlowLength(_layoutRect);
// Ask each command for its requested raw size
CalculateRawCommandSize(g);
// Adjust size of button commands to reflect detail properties
AdjustButtonSizes();
}
private void InternalConstruct()
{
// Create internal state objects
_details = new CommandDetails(this);
_engine = new SingleLayoutEngine();
_states = new CommandStateCollection();
_padding = new Padding();
// Define state
_initCount = 0;
_layoutRequired = false;
_mouseDownButton = MouseButtons.None;
_mouseCapture = false;
_currentCmdState = null;
_tooltipCmdState = null;
// Hook into padding changed events
_padding.PaddingChanged += new EventHandler(OnPaddingChanged);
// Create exposed/internal collections of commands
_externals = new CommandBaseCollection();
_internals = new CommandBaseCollection();
// Hook into command collection modifications
_externals.Clearing += new CollectionClear(OnCommandsClearing);
_externals.Cleared += new CollectionClear(OnCommandsCleared);
_externals.Inserted += new CollectionChange(OnCommandInserted);
_externals.Removed += new CollectionChange(OnCommandRemoved);
_internals.Clearing += new CollectionClear(OnCommandsClearing);
_internals.Cleared += new CollectionClear(OnCommandsCleared);
_internals.Inserted += new CollectionChange(OnCommandInserted);
_internals.Removed += new CollectionChange(OnCommandRemoved);
// Need a timer so that when the mouse hovers we can show tooltips
_hoverTimer = new Timer();
_hoverTimer.Tick += new EventHandler(OnMouseHoverTick);
// Need a timer so that we can send updates to top level commands
_updateTimer = new Timer();
_updateTimer.Tick += new EventHandler(OnUpdateTick);
}
private Rectangle InternalLayoutCommands(CommandStateCollection states,
ICommandDetails details,
bool findIdealSize)
{
Rectangle returnRect = Rectangle.Empty;
using (Graphics g = details.HostControl.CreateGraphics())
{
// Prepare state for processing
Prepare(g, states, details, findIdealSize);
// Position the most important 'System' commands first, followed by
// the less important 'Near' commands and lastly the 'Far' commands
// which have the lowest priority of all.
CalculateByPosition(g, Position.System, false);
CalculateByPosition(g, Position.Near, true);
CalculateByPosition(g, Position.Far, false);
// Calculate the final positions depending on maximum values encountered
CalculateFinalPositions();
returnRect = _layoutRect;
// Calculate the actual area we have decided to use
if (_details.Direction == LayoutDirection.Horizontal)
{
returnRect.Height = _maximumTangent;
}
else
{
returnRect.Width = _maximumTangent;
}
}
return(returnRect);
}
private void ClearDown()
{
_states = null;
_details = null;
}
