Delphi: sliding (animated) panel
Try NLDSideBar, a container component written by myself that is collapsable and aligned along the left or right side of its parent.
Interface:
property Align: TSideBarAlign default alLeft;
property AutoHide: Boolean default False;
property Hint: String;
property MinWidth: Integer default DefWidth;
property OnAutoHideChanged: TNotifyEvent;
property OnHide: TNotifyEvent;
property PinButtonDownHint: String;
property PinButtonUpHint: String;
property PinButtonVisible: Boolean default True;
property Resizable: Boolean default True;
property SideButtonWidth: Integer default DefSideButtonWidth;
property Caption;
property Color default clBtnFace;
property Font;
property ParentColor default False;
property ParentFont;
property ParentShowHint;
property PopupMenu;
property TabOrder;
property TabStop;
Or maybe this older version which is animated. Free to use, free to modify.
Sorry for being self-promotive, but I think it's an answer to the question.
The new Delphi version will include such kind of sliding panels ( trough the integration of FireMonkey, formely vgScene/dxScene ). You'll just have to click on height or position props and an option will allow to create a animation for this, with various option ( interpolation kind, duration etc).
Since version 2009, there is a TCategoryPanelGroup where you add TCategoryPanel.
We ended up building our own control. We could not find anything that worked quite how we wanted. It ended up not being that hard. I'm sure there are situations we are not handling correctly, but so for this is working good for us.
The code below is using cxGroupBox because we needed that look to match the rest of our application. That can be switched out for a normal GroupBox.
We are using this in two places. In one case we have a number of these panels inside a standard Delphi Flow Panel (I'm not sure what version that was added). When our DynPanel collapses everything automatically moves up and fills the space.
In the other case we have a window that is split between a main section and a toolbox. The two are separated by a standard splitter. The main window is set to align to client. When our panel collapses or expands. the splitter automatically moves and expands the main section.
We never did quite get the "container" control stuff to work so items you add to the panel can be moved outside the bounds you would normally expect in a group box. But that does not cause us any major problems so we just left it. This also does not account for DPI changes in relation to the button size. The caption will get bigger but the button will not.
unit DynPanel;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ExtCtrls, cxGroupBox;
const
DEFAULTBUTTONWIDTH = 16;
DEFAULTWIDTH = 161;
DEFAULTHEIGHT = 81;
cButtonPadding = 8;
cCollapsePadding = 3;
cCaptionPadding = ' ';
cCollapsedSize = DEFAULTBUTTONWIDTH + cCollapsePadding;
cAutoCollapseSize = DEFAULTBUTTONWIDTH + cButtonPadding;
type
TCollapseDirection = (cdUp, cdRight, cdLeft);
TMinDemension = cAutoCollapseSize..High(Integer);
TDynPanel = class(TPanel)
private
FGroupBox: TcxGroupBox;
FButtonPanel: TPanel;
FButtonImage: TImage;
FExpand: Boolean;
FOldHeight: Integer;
FOldWidth: Integer;
FCollapseDirection: TCollapseDirection;
FOrigGroupBoxCaption: String;
FAutoCollapseHeight: TMinDemension;
FAutoCollapseWidth: TMinDemension;
FButtonPadding: integer;
FCollapsePadding: integer;
FCollapsedSize: integer;
procedure SetExpand(Value: Boolean);
procedure SetGroupBoxCaption(Value: string);
procedure ButtonMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure CMShowingChanged(var Message: TMessage); message CM_SHOWINGCHANGED;
procedure EnableControls(Value: Boolean);
procedure SetCollapseDirection(Value: TCollapseDirection);
procedure ConfigurePanel;
procedure SetMinHeight(Value: TMinDemension);
procedure SetMinWidth(Value: TMinDemension);
procedure UpdateImage();
protected
procedure Resize; override;
procedure ChangeScale(M, D: Integer); override;
public
constructor Create(AOwner: TComponent); override;
property OldHeight: Integer read FOldHeight write FOldHeight;
property OldWidth: Integer read FOldWidth write FOldWidth;
property GroupBox: TcxGroupBox read FGroupBox;
published
property Caption: string read FOrigGroupBoxCaption write SetGroupBoxCaption;
property Expand: Boolean read FExpand write SetExpand;
property BevelOuter default bvNone;
property CollapseDirection: TCollapseDirection read FCollapseDirection write SetCollapseDirection default cdUp;
property AutoCollapseHeight: TMinDemension read FAutoCollapseHeight write SetMinHeight default cAutoCollapseSize;
property AutoCollapseWidth: TMinDemension read FAutoCollapseWidth write SetMinWidth default cAutoCollapseSize;
end;
procedure Register;
implementation
{$R 'ButtonImages\ButtonImages.res' 'ButtonImages\ButtonImages.rc'}
uses cxEdit;
procedure Register;
begin
RegisterComponents('AgWare', [TDynPanel]);
end;
{ TDynPanel }
{
TDynPanel.Create
---------------------------------------------------------------------------
}
constructor TDynPanel.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
Self.ControlStyle := ControlStyle - [csSetCaption];
Self.Width := DEFAULTWIDTH;
Self.Height := DEFAULTHEIGHT;
BevelOuter := bvNone;
FExpand := True;
FOldHeight := Self.Height;
FOldWidth := Self.Width;
FOrigGroupBoxCaption := 'AgDynPanel';
FCollapseDirection := cdUp;
FAutoCollapseHeight := cAutoCollapseSize;
FAutoCollapseWidth := cAutoCollapseSize;
FGroupBox := TcxGroupBox.Create(Self);
FGroupBox.Parent := Self;
FGroupBox.Align := alClient;
FGroupBox.Alignment := alTopLeft;
FButtonPanel := TPanel.Create(Self);
FButtonPanel.Parent := Self;
FButtonPanel.Top := 0;
FButtonPanel.Width := DEFAULTBUTTONWIDTH;
FButtonPanel.Height := DEFAULTBUTTONWIDTH;
FButtonPanel.Left := Width - DEFAULTBUTTONWIDTH - FButtonPadding;
FButtonPanel.OnMouseDown := ButtonMouseDown;
FButtonImage := TImage.Create(Self);
FButtonImage.Parent := FButtonPanel;
FButtonImage.Align := alClient;
FButtonImage.Stretch := false;
FButtonImage.Center := true;
FButtonImage.OnMouseDown := ButtonMouseDown;
UpdateImage;
// The click should also work for the entire top of the group box.
FGroupBox.OnMouseDown := ButtonMouseDown;
FGroupBox.Caption := FOrigGroupBoxCaption;
FGroupBox.Style.Font.Style := FGroupBox.Style.Font.Style + [fsBold];
FButtonPadding := cButtonPadding;
FCollapsePadding := cCollapsePadding;
FCollapsedSize := cCollapsedSize;
end;
{
TDynPanel.SetGroupBoxCaption
---------------------------------------------------------------------------
}
procedure TDynPanel.SetGroupBoxCaption(Value: String);
begin
FOrigGroupBoxCaption := Value;
ConfigurePanel;
end;
{
TDynPanel.SetMinHeight
---------------------------------------------------------------------------
}
procedure TDynPanel.SetMinHeight(Value: TMinDemension);
begin
if Value = FAutoCollapseHeight then
Exit; // >>----->
FAutoCollapseHeight := Value;
if Showing then
Resize;
end;
{
TDynPanel.SetMinWidth
---------------------------------------------------------------------------
}
procedure TDynPanel.SetMinWidth(Value: TMinDemension);
begin
if Value = FAutoCollapseWidth then
Exit; // >>----->
FAutoCollapseWidth := Value;
if Showing then
Resize;
end;
{
TDynPanel.ButtonMouseDown
---------------------------------------------------------------------------
}
procedure TDynPanel.ButtonMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
if Button mbLeft then
Exit; // >>----->
if ((FExpand = True) and (Y FCollapsePadding)) or
((FExpand = False) and (FCollapseDirection = cdLeft) and (X >----->
FExpand := Value;
//ConfigurePanel;
//--------------------------------------------------------------------------
// Set the group box size
//--------------------------------------------------------------------------
//
// I chose to do the resizing of the control here rather than in
// ConfigurePanel because if you do it there the SetBounds will call ReSize
// which will call ConfigurePanel again so that you would need to keep track
// of a boolean variable to determine if you are making recursive calls into
// ConfigurePanel. That is one reason. Another is that when the dfm values
// are streamed in and the properties get set you will resize the control
// before the actual Height and Width properties are set. This will cause
// bogus default values to be stored for FOldHeight and FOldWidth and when
// the control is displayed the dimensions will be wrong. If you size the
// control here then, on creation, Resize will not get called and the
// FOldHeight and FOldWidth values will not get saved off until
// CMShowingChanged will explicitly call ReSize after the dimensions are
// properly set. If you move this code into ConfigurePanel then when the
// caption is streamed in and set from the dfm then ConfigurePanel would get
// called, we would SetBounds there and then Resize would fire storing off the
// default invalid values for the FOld variables as mentioned above.
// Hope this makes sense. Leave the SetBounds calls here and make your life
// easier. :)
//--------------------------------------------------------------------------
// Changing to Expanded
if FExpand = True then
begin
// Up
if FCollapseDirection = cdUp then
SetBounds(Left, Top, Width, FOldHeight)
// Right
else if FCollapseDirection = cdRight then
SetBounds((Left + Width) - FOldWidth, Top, FOldWidth, Height)
// Left
else if FCollapseDirection = cdLeft then
SetBounds(Left, Top, FOldWidth, Height);
end
// Changing to Collapsed
else
begin
// Up
if FCollapseDirection = cdUp then
begin
// Reset the AutoCollapseHeight just to make sure we don't try to
// recollapse on resize.
if FAutoCollapseHeight FGroupBox) and
(Self.Controls[i] FButtonPanel) then
begin
Self.Controls[i].Enabled := Value;
Self.Controls[i].Visible := Value;
end;
end;
end;
{
TDynPanel.CMShowingChanged
---------------------------------------------------------------------------
}
procedure TDynPanel.CMShowingChanged(var Message: TMessage);
begin
inherited;
if Showing then
Resize;
end;
{
TDynPanel.Resize
---------------------------------------------------------------------------
}
procedure TDynPanel.Resize;
begin
if FExpand = True then
begin
if (FCollapseDirection = cdUp) and (Height FAutoCollapseHeight then
begin
FOldHeight := Height;
Expand := True;
end
else
Height := FCollapsedSize;
end
else if (FCollapseDirection = cdLeft) or (FCollapseDirection = cdRight) then
begin
if (Width > FAutoCollapseWidth) then
begin
FOldWidth := Width;
Expand := True;
end
else
Width := FCollapsedSize;
end;
end;
ConfigurePanel;
end;
{
TDynPanel.ChangeScale
---------------------------------------------------------------------------
}
procedure TDynPanel.ChangeScale(M, D: Integer);
begin
FAutoCollapseHeight := MulDiv(FAutoCollapseHeight, M, D);
FAutoCollapseWidth := MulDiv(FAutoCollapseWidth, M, D);
FButtonPadding := MulDiv(FButtonPadding, M, D);
FCollapsePadding := MulDiv(FCollapsePadding, M, D);
FCollapsedSize := MulDiv(FCollapsedSize, M, D);
FOldHeight := MulDiv(FOldHeight, M, D);
FOldWidth := MulDiv(FOldWidth, M, D);
// inherited will cause resize to be called. I need to update
// my internal values before that happens, otherwise I will resize based
// on the old values.
inherited;
end;
{
TDynPanel.SetCollapseDirection
---------------------------------------------------------------------------
}
procedure TDynPanel.SetCollapseDirection(Value: TCollapseDirection);
begin
if Value = FCollapseDirection then
Exit; // >>----->
FCollapseDirection := Value;
ConfigurePanel;
end;
{
TDynPanel.ConfigurePanel
---------------------------------------------------------------------------
}
procedure TDynPanel.ConfigurePanel;
begin
//--------------------------------------------------------------------------
// Set the group box style, caption alignment, caption, button position, and
// button image
//--------------------------------------------------------------------------
// Changing to Expanded
if FExpand = True then
begin
FGroupBox.Style.Color := clWhite;
// Up
if FCollapseDirection = cdUp then
begin
FGroupBox.Alignment := alTopLeft;
FGroupBox.Caption := FOrigGroupBoxCaption;
FButtonPanel.Top := 0;
FButtonPanel.Left := Width - FButtonPanel.Width - FButtonPadding;
end
// Right
else if FCollapseDirection = cdRight then
begin
FGroupBox.Alignment := alTopLeft;
FGroupBox.Caption := ' ' + FOrigGroupBoxCaption;
FButtonPanel.Top := 0;
FButtonPanel.Left := FButtonPadding;
end
// Left
else if FCollapseDirection = cdLeft then
begin
FGroupBox.Alignment := alTopLeft;
FGroupBox.Caption := FOrigGroupBoxCaption;
FButtonPanel.Top := 0;
FButtonPanel.Left := Width - FButtonPanel.Width - FButtonPadding;
end;
end
// Changing to Collapsed
else
begin
FGroupBox.Style.Color := clGradientActiveCaption;
// Up
if FCollapseDirection = cdUp then
begin
FGroupBox.Alignment := alTopLeft;
FGroupBox.Caption := FOrigGroupBoxCaption;
FButtonPanel.Top := 0;
FButtonPanel.Left := Width - FButtonPanel.Width - FButtonPadding;
end
// Right
else if FCollapseDirection = cdRight then
begin
FGroupBox.Alignment := alRightTop;
FGroupBox.Caption := ' ' + FOrigGroupBoxCaption;
FButtonPanel.Top := FButtonPadding;
FButtonPanel.Left := FCollapsePadding;
end
// Left
else if FCollapseDirection = cdLeft then
begin
FGroupBox.Alignment := alLeftTop;
FGroupBox.Caption := FOrigGroupBoxCaption + ' ';
FButtonPanel.Top := FButtonPadding;
FButtonPanel.Left := 0;
end;
end;
UpdateImage;
// Now draw the button and invalidate Self
Self.Invalidate;
end;
{
TDynPanel.UpdateImage
---------------------------------------------------------------------------
}
procedure TDynPanel.UpdateImage();
begin
case FCollapseDirection of
cdUp:
begin
if FExpand = true then
FButtonImage.Picture.Bitmap.LoadFromResourceName(HInstance, 'ButtonImageUp')
else
FButtonImage.Picture.Bitmap.LoadFromResourceName(HInstance, 'ButtonImageDown');
end;
cdLeft:
begin
if FExpand = true then
FButtonImage.Picture.Bitmap.LoadFromResourceName(HInstance, 'ButtonImageLeft')
else
FButtonImage.Picture.Bitmap.LoadFromResourceName(HInstance, 'ButtonImageRight');
end;
cdRight:
begin
if FExpand = true then
FButtonImage.Picture.Bitmap.LoadFromResourceName(HInstance, 'ButtonImageRight')
else
FButtonImage.Picture.Bitmap.LoadFromResourceName(HInstance, 'ButtonImageLeft');
end;
end;
end;
end.
Close to the Left
Close to the Top
