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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit UserInterface.Control.Panel.Stack;
interface
uses
Geometry._2d.Integer32.Rectangle,
Geometry._2d.Integer32.Size,
Integer._32,
UserInterface.Control,
UserInterface.Control.Panel;
type
TStackPanel = class(TOpaquePanel)
protected
FInterControlSpace: TInteger32;
procedure BoundsChanged(const OldBounds: TInteger32Rectangle; const NewBounds: TInteger32Rectangle); override;
procedure HasBeenBoundToLayout(); override;
procedure SetInterControlSpace(const Value: TInteger32);
public
function Embellish(): TControl; override;
procedure AddControl(Control: TControl); virtual;
property InterControlSpace: TInteger32 read FInterControlSpace write SetInterControlSpace;
end;
TVerticalStackPanel = class(TStackPanel)
public
procedure LayoutControls(); override;
function GetPreferredSize(AvailableSize: TInteger32Size): TInteger32Size; override;
end;
THorizontalStackPanel = class(TStackPanel)
public
procedure LayoutControls(); override;
function GetPreferredSize(AvailableSize: TInteger32Size): TInteger32Size; override;
end;
implementation
uses
Geometry._2d.Integer32.Point,
Mathematics,
UserInterface.Control.Margin;
{ TStackPanel }
procedure TStackPanel.AddControl(Control: TControl);
begin
ChildControls.Add(Control.Embellish());
LayoutControls();
end;
function TStackPanel.Embellish(): TControl;
var
Margin: TControlMargin;
begin
Margin := TControlMargin.Create();
Margin.Insets := TInteger32Rectangle.New(4, 4, 4, 4);
Margin.Control := Self;
Result := Margin;
end;
procedure TStackPanel.HasBeenBoundToLayout();
begin
inherited HasBeenBoundToLayout();
LayoutControls();
end;
procedure TStackPanel.SetInterControlSpace(const Value: TInteger32);
begin
if Value <> InterControlSpace then
begin
FInterControlSpace := Value;
LayoutControls();
Invalidate();
end;
end;
procedure TStackPanel.BoundsChanged(const OldBounds: TInteger32Rectangle; const NewBounds: TInteger32Rectangle);
begin
inherited BoundsChanged(OldBounds, NewBounds);
if OldBounds.Size <> NewBounds.Size then
LayoutControls();
end;
{ TVerticalStackPanel }
procedure TVerticalStackPanel.LayoutControls();
var
CurrentTop: TInteger32;
ChildControl: TControl;
PreferredSize: TInteger32Size;
begin
if IsBoundToLayout() then
begin
CurrentTop := 0;
for ChildControl in ChildControls do
begin
PreferredSize := ChildControl.ResolveStyleSize(TInteger32Size.New(TInteger32Size.Maximum.Width, Height));
ChildControl.Bounds := TInteger32Rectangle.New(
TInteger32Point.New(0, CurrentTop),
TInteger32Size.New(Width, PreferredSize.Height)
);
Inc(CurrentTop, ChildControl.Height + InterControlSpace);
end;
end;
end;
function TVerticalStackPanel.GetPreferredSize(AvailableSize: TInteger32Size): TInteger32Size;
var
ChildControl: TControl;
AvailableChildSize: TInteger32Size;
PreferredChildSize: TInteger32Size;
begin
AvailableChildSize := TInteger32Size.New(AvailableSize.Width, TInteger32Size.Maximum.Height);
Result := TInteger32Size.New(0, 0);
if ChildControls.Count > 0 then
begin
for ChildControl in ChildControls do
begin
PreferredChildSize := ChildControl.ResolveStyleSize(AvailableChildSize);
Inc(Result.Height, PreferredChildSize.Height);
Result.Width := Maximum(PreferredChildSize.Width, Result.Width);
end;
Inc(Result.Height, (ChildControls.Count - 1) * InterControlSpace);
end;
end;
{ THorizontalStackPanel }
procedure THorizontalStackPanel.LayoutControls();
var
CurrentLeft: TInteger32;
ChildControl: TControl;
PreferredSize: TInteger32Size;
begin
if IsBoundToLayout() then
begin
CurrentLeft := 0;
for ChildControl in ChildControls do
begin
PreferredSize := ChildControl.ResolveStyleSize(TInteger32Size.New(TInteger32Size.Maximum.Width, Height));
ChildControl.Bounds := TInteger32Rectangle.New(
TInteger32Point.New(CurrentLeft, 0),
TInteger32Size.New(PreferredSize.Width, Height)
);
Inc(CurrentLeft, ChildControl.Width + InterControlSpace);
end;
end;
end;
function THorizontalStackPanel.GetPreferredSize(AvailableSize: TInteger32Size): TInteger32Size;
var
ChildControl: TControl;
AvailableChildSize: TInteger32Size;
PreferredChildSize: TInteger32Size;
begin
AvailableChildSize := TInteger32Size.New(TInteger32Size.Maximum.Width, AvailableSize.Height);
Result := TInteger32Size.New(0, 0);
if ChildControls.Count > 0 then
begin
for ChildControl in ChildControls do
begin
PreferredChildSize := ChildControl.ResolveStyleSize(AvailableChildSize);
Inc(Result.Width, PreferredChildSize.Width);
Result.Height := Maximum(PreferredChildSize.Height, Result.Height);
end;
Inc(Result.Width, (ChildControls.Count - 1) * InterControlSpace);
end;
end;
end.
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