internal void InvalidatePanel(FlowPanel panel, Rectangle rect)
{
Verify.Argument.IsNotNull(panel, nameof(panel));
Verify.Argument.IsTrue(panel.FlowControl == this, "panel", "Panel is not owned by this FlowLayoutControl.");
var graphics = GraphicsUtility.MeasurementGraphics;
int y = ClientArea.Y - VScrollPos;
int x = ClientArea.X - HScrollPos;
for (int i = 0; i < Panels.Count; ++i)
{
var p = Panels[i];
var size = GetPanelSize(graphics, p);
int maxY = y + size.Height;
if (p == panel)
{
if (maxY >= ClientArea.Y)
{
var bounds = new Rectangle(x + rect.X, y + rect.Y, rect.Width, rect.Height);
var clip = Rectangle.Intersect(bounds, ClientArea);
if (clip.Width > 0 && clip.Height > 0)
{
Invalidate(clip);
}
}
break;
}
if (maxY >= ClientArea.Bottom)
{
break;
}
y = maxY;
}
}
protected override void OnMouseDoubleClick(MouseEventArgs e)
{
int x = e.X;
int y = e.Y;
int panelY = ClientArea.Y - VScrollPos;
_mouseDownPanel = null;
bool found = false;
for (int i = 0; i < Panels.Count; ++i)
{
var panel = Panels[i];
var size = GetPanelSize(panel);
int maxY = panelY + size.Height;
if (maxY >= y)
{
_mouseDownPanel = panel;
_panelHover.Track(i, panel);
OnPanelDoubleClick(panel, x - ClientArea.X + HScrollPos, y - panelY, e.Button);
found = true;
break;
}
if (maxY >= ClientRectangle.Bottom)
{
break;
}
panelY = maxY;
}
if (!found)
{
OnFreeSpaceDoubleClick(x, y, e.Button);
}
Focus();
base.OnMouseDoubleClick(e);
}
private Size GetPanelSize(Graphics graphics, FlowPanel panel, int width)
{
if (!_sizes.TryGetValue(panel, out var size))
{
size = panel.Measure(
new FlowPanelMeasureEventArgs(graphics, width));
_sizes.Add(panel, size);
}
return(size);
}
private Size GetPanelSize(FlowPanel panel)
{
if (!_sizes.TryGetValue(panel, out var size))
{
var graphics = GraphicsUtility.MeasurementGraphics;
size = panel.Measure(
new FlowPanelMeasureEventArgs(graphics, ClientArea.Width));
_sizes.Add(panel, size);
}
return(size);
}
internal void InvalidatePanelSize(FlowPanel panel)
{
if (InvokeRequired)
{
BeginInvoke(new Action <FlowPanel>(InvalidatePanelSize), panel);
}
else
{
_sizes.Remove(panel);
NotifyContentSizeChanged();
}
}
private Size GetPanelSize(Graphics graphics, FlowPanel panel)
{
Size size;
if (!_sizes.TryGetValue(panel, out size))
{
size = panel.Measure(
new FlowPanelMeasureEventArgs(graphics, ClientArea.Width));
_sizes.Add(panel, size);
}
return(size);
}
protected override void OnMouseUp(MouseEventArgs e)
{
if (_mouseDownPanel != null)
{
if (_mouseDownPanel.FlowControl == this)
{
int x = e.X;
int y = e.Y;
var bounds = GetPanelBounds(_mouseDownPanel);
_mouseDownPanel.MouseUp(x - ClientArea.X + HScrollPos, y - bounds.Y + VScrollPos, e.Button);
}
_mouseDownPanel = null;
}
base.OnMouseUp(e);
}
internal void ScrollIntoView(FlowPanel p)
{
int panelY = 0;
for (int i = 0; i < Panels.Count; ++i)
{
var panel = Panels[i];
var size = GetPanelSize(panel);
int maxY = panelY + size.Height;
if (p == panel)
{
if (panelY > MaxVScrollPos)
{
panelY = MaxVScrollPos;
}
VScrollBar.Value = panelY;
break;
}
panelY = maxY;
}
}
internal Rectangle GetPanelBounds(FlowPanel panel)
{
Verify.Argument.IsNotNull(panel, nameof(panel));
Verify.Argument.IsTrue(panel.FlowControl == this, "panel", "Panel is not owned by this FlowLayoutControl.");
var graphics = GraphicsUtility.MeasurementGraphics;
int y = ClientArea.Y;
for (int i = 0; i < Panels.Count; ++i)
{
var p = Panels[i];
var size = GetPanelSize(graphics, p);
int maxY = y + size.Height;
if (p == panel)
{
return(new Rectangle(ClientArea.X, y, size.Width, size.Height));
}
y = maxY;
}
Assert.Fail("Panel not found.");
return(Rectangle.Empty);
}
protected FlowPanelHeader(FlowPanel flowPanel)
{
Verify.Argument.IsNotNull(flowPanel, "flowPanel");
_flowPanel = flowPanel;
}
protected virtual void OnPanelDoubleClick(FlowPanel panel, int x, int y, MouseButtons button)
{
panel.DoubleClick(x, y, button);
}
protected virtual void OnPanelMouseDown(FlowPanel panel, int x, int y, MouseButtons button)
{
panel.MouseDown(x, y, button);
}
protected FlowPanelHeader(FlowPanel flowPanel)
{
Verify.Argument.IsNotNull(flowPanel, "flowPanel");
_flowPanel = flowPanel;
}
