Вот что у нас получится. Левая и правая панельки нужны для листания вправо и влево. Листание происходит за счет смещения на 1 плитку в ту или иную сторону.
Стартовое размещение плиток при загрузке.
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procedure TGoodsOfMonth.PositionElements; var k: integer; canvasWidth: integer; elementWidth: Integer; maxN_X: integer; leftDist: integer; rightDist: integer; x: integer; canvasMiddle: Int64; y: Integer; j: integer; elementsCenter: Integer; shiftDist: Integer; begin if FOL.Count = 0 then exit; canvasWidth := FBrowserWidth - pLeft.Width - pRight.Width; //pContent.Width; elementWidth := FOL[0].Width; leftDist := 10; rightDist := 10; k := 0; // put everything on pContent x := -FOL[0].Width + pLeft.Width; y := 10; FLeftIndex := 0; // make all invisible for j := k to FOL.Count - 1 do FOL[j].Visible := false; // repeat x := x + FOL[k].Width + leftDist; if (x + elementWidth) > CanvasWidth then begin FRightIndex := k - 1; if FRightIndex < 0 then FRightIndex := 0; // for j := k to FOL.Count - 1 do // FOL[j].Visible := false; break; end; FOL[k].Left := x; FOL[k].Top := y; FOL[k].Visible := true; inc(k); until k = FOL.Count; //shift to center canvasMiddle := trunc((canvasWidth - 40) / 2); elementsCenter := trunc(((FOL[FRightIndex].Left + FOL[FRightIndex].Width) - (FOL[FLeftIndex].Left)) / 2); shiftDist := canvasMiddle - elementsCenter; for j := FLeftIndex to FRightIndex do FOL[j].Left := FOL[j].Left + shiftDist; // How much elements will be on visible part of Canvas // maxN_X := Math.Floor(canvasWidth / (elementWidth + leftDist + rightDist)); end; |
Смещение на 1 плитку вправо
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procedure TGoodsOfMonth.iRightClick(Sender: TObject); var i, k: Integer; count: integer; leftIndex, rightIndex: integer; x: integer; leftDist: Integer; y: integer; elementWidth: integer; canvasWidth: integer; j: integer; canvasMiddle: integer; elementsCenter: integer; shiftDist: integer; newLeftIndex: integer; newRightIndex: Integer; begin // move right to 1 panel if FRightIndex < FOL.Count - 1 then begin // new index borders newLeftIndex := FLeftIndex + 1; newRightIndex := FRightIndex + 1; if newLeftIndex > FOL.Count - 1 then newLeftIndex := FOL.Count - 1; if newRightIndex > FOL.Count - 1 then newRightIndex := FOL.Count - 1; // for i := FLeftIndex to FRightIndex do begin FOL[i].Visible := false; end; // k := newLeftIndex - 1; x := -FOL[k].Width + pLeft.Width; y := 10; elementWidth := FOL[k].Width; canvasWidth := FBrowserWidth - pLeft.Width - pRight.Width; leftDist := 10; repeat inc(k); x := x + FOL[k].Width + leftDist; FOL[k].Left := x; FOL[k].Top := y; FOL[k].Visible := true; until k >= newRightIndex; FLeftIndex := newLeftIndex; FRightIndex := newRightIndex; // // centering canvasMiddle := trunc((canvasWidth - 40) / 2); elementsCenter := trunc(((FOL[FRightIndex].Left + FOL[FRightIndex].Width) - (FOL[FLeftIndex].Left)) / 2); shiftDist := canvasMiddle - elementsCenter; for j := FLeftIndex to FRightIndex do FOL[j].Left := FOL[j].Left + shiftDist; end; end; |
Смещение на 1 плитку влево
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procedure TGoodsOfMonth.iLeftClick(Sender: TObject); var i, k: Integer; count: integer; leftIndex, rightIndex: integer; x: integer; leftDist: Integer; y: integer; elementWidth: integer; canvasWidth: integer; j: integer; canvasMiddle: integer; elementsCenter: integer; shiftDist: integer; newLeftIndex: integer; newRightIndex: Integer; begin // move right to 1 panel if FLeftIndex > 0 then begin // new index borders newLeftIndex := FLeftIndex - 1; newRightIndex := FRightIndex - 1; if newLeftIndex < 0 then newLeftIndex := 0; if newRightIndex < 0 then newRightIndex := 0; // for i := FLeftIndex to FRightIndex do begin FOL[i].Visible := false; end; // k := newLeftIndex - 1; x := -FOL[0].Width + pLeft.Width; y := 10; elementWidth := FOL[0].Width; canvasWidth := FBrowserWidth - pLeft.Width - pRight.Width; leftDist := 10; repeat inc(k); x := x + FOL[k].Width + leftDist; FOL[k].Left := x; FOL[k].Top := y; FOL[k].Visible := true; until k >= newRightIndex; FLeftIndex := newLeftIndex; FRightIndex := newRightIndex; // centering canvasMiddle := trunc((canvasWidth - 40) / 2); elementsCenter := trunc(((FOL[FRightIndex].Left + FOL[FRightIndex].Width) - (FOL[FLeftIndex].Left)) / 2); shiftDist := canvasMiddle - elementsCenter; for j := FLeftIndex to FRightIndex do FOL[j].Left := FOL[j].Left + shiftDist; end; end; |
Полный код модуля
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unit uGoodsOfMonth; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, uniGUITypes, uniGUIAbstractClasses, uniGUIClasses, uniGUIFrame, uCommon, uniGUIBaseClasses, uniPanel, uGoodsOfMonthElement, System.Generics.Collections, uniImage; type TGoodsOfMonth = class(TUniFrame) pTop: TUniPanel; pContent: TUniPanel; pLeft: TUniPanel; pRight: TUniPanel; iRight: TUniImage; iLeft: TUniImage; procedure UniFrameCreate(Sender: TObject); procedure UniFrameDestroy(Sender: TObject); procedure iRightClick(Sender: TObject); procedure iLeftClick(Sender: TObject); private FBrowserWidth: Integer; FBrowserHeight: Integer; FOL: TObjectList<TGoodsOfMonthElement>; FNameCount: integer; FLeftIndex: integer; FRightIndex: integer; procedure PositionElements; procedure resizeView(aBrowserWidth: integer); procedure setView(aView: TView); procedure SetOL(const Value: TObjectList<TGoodsOfMonthElement>); { Private declarations } public { Public declarations } procedure OnBrowserResize(aWidth, aHeight, aOldWidth, aOldHeight: integer); procedure OnAfterRender(aWidth, aHeight: integer); property OL: TObjectList<TGoodsOfMonthElement> read FOL write SetOL; end; implementation {$R *.dfm} uses Math; procedure TGoodsOfMonth.iLeftClick(Sender: TObject); var i, k: Integer; count: integer; leftIndex, rightIndex: integer; x: integer; leftDist: Integer; y: integer; elementWidth: integer; canvasWidth: integer; j: integer; canvasMiddle: integer; elementsCenter: integer; shiftDist: integer; newLeftIndex: integer; newRightIndex: Integer; begin // move right to 1 panel if FLeftIndex > 0 then begin // new index borders newLeftIndex := FLeftIndex - 1; newRightIndex := FRightIndex - 1; if newLeftIndex < 0 then newLeftIndex := 0; if newRightIndex < 0 then newRightIndex := 0; // for i := FLeftIndex to FRightIndex do begin FOL[i].Visible := false; end; // k := newLeftIndex - 1; x := -FOL[0].Width + pLeft.Width; y := 10; elementWidth := FOL[0].Width; canvasWidth := FBrowserWidth - pLeft.Width - pRight.Width; leftDist := 10; repeat inc(k); x := x + FOL[k].Width + leftDist; FOL[k].Left := x; FOL[k].Top := y; FOL[k].Visible := true; until k >= newRightIndex; FLeftIndex := newLeftIndex; FRightIndex := newRightIndex; // centering canvasMiddle := trunc((canvasWidth - 40) / 2); elementsCenter := trunc(((FOL[FRightIndex].Left + FOL[FRightIndex].Width) - (FOL[FLeftIndex].Left)) / 2); shiftDist := canvasMiddle - elementsCenter; for j := FLeftIndex to FRightIndex do FOL[j].Left := FOL[j].Left + shiftDist; end; end; procedure TGoodsOfMonth.iRightClick(Sender: TObject); var i, k: Integer; count: integer; leftIndex, rightIndex: integer; x: integer; leftDist: Integer; y: integer; elementWidth: integer; canvasWidth: integer; j: integer; canvasMiddle: integer; elementsCenter: integer; shiftDist: integer; newLeftIndex: integer; newRightIndex: Integer; begin // move right to 1 panel if FRightIndex < FOL.Count - 1 then begin // new index borders newLeftIndex := FLeftIndex + 1; newRightIndex := FRightIndex + 1; if newLeftIndex > FOL.Count - 1 then newLeftIndex := FOL.Count - 1; if newRightIndex > FOL.Count - 1 then newRightIndex := FOL.Count - 1; // for i := FLeftIndex to FRightIndex do begin FOL[i].Visible := false; end; // k := newLeftIndex - 1; x := -FOL[k].Width + pLeft.Width; y := 10; elementWidth := FOL[k].Width; canvasWidth := FBrowserWidth - pLeft.Width - pRight.Width; leftDist := 10; repeat inc(k); x := x + FOL[k].Width + leftDist; FOL[k].Left := x; FOL[k].Top := y; FOL[k].Visible := true; until k >= newRightIndex; FLeftIndex := newLeftIndex; FRightIndex := newRightIndex; // // centering canvasMiddle := trunc((canvasWidth - 40) / 2); elementsCenter := trunc(((FOL[FRightIndex].Left + FOL[FRightIndex].Width) - (FOL[FLeftIndex].Left)) / 2); shiftDist := canvasMiddle - elementsCenter; for j := FLeftIndex to FRightIndex do FOL[j].Left := FOL[j].Left + shiftDist; end; end; procedure TGoodsOfMonth.OnAfterRender(aWidth, aHeight: integer); begin FBrowserWidth := aWidth; FBrowserHeight := aHeight; // resizeView(FBrowserWidth); end; procedure TGoodsOfMonth.OnBrowserResize(aWidth, aHeight, aOldWidth, aOldHeight: integer); begin FBrowserWidth := aWidth; FBrowserHeight := aHeight; resizeView(FBrowserWidth); end; procedure TGoodsOfMonth.PositionElements; var k: integer; canvasWidth: integer; elementWidth: Integer; maxN_X: integer; leftDist: integer; rightDist: integer; x: integer; canvasMiddle: Int64; y: Integer; j: integer; elementsCenter: Integer; shiftDist: Integer; begin if FOL.Count = 0 then exit; canvasWidth := FBrowserWidth - pLeft.Width - pRight.Width; //pContent.Width; elementWidth := FOL[0].Width; leftDist := 10; rightDist := 10; k := 0; // put everything on pContent x := -FOL[0].Width + pLeft.Width; y := 10; FLeftIndex := 0; // make all invisible for j := k to FOL.Count - 1 do FOL[j].Visible := false; // repeat x := x + FOL[k].Width + leftDist; if (x + elementWidth) > CanvasWidth then begin FRightIndex := k - 1; if FRightIndex < 0 then FRightIndex := 0; // for j := k to FOL.Count - 1 do // FOL[j].Visible := false; break; end; FOL[k].Left := x; FOL[k].Top := y; FOL[k].Visible := true; inc(k); until k = FOL.Count; //shift to center canvasMiddle := trunc((canvasWidth - 40) / 2); elementsCenter := trunc(((FOL[FRightIndex].Left + FOL[FRightIndex].Width) - (FOL[FLeftIndex].Left)) / 2); shiftDist := canvasMiddle - elementsCenter; for j := FLeftIndex to FRightIndex do FOL[j].Left := FOL[j].Left + shiftDist; // How much elements will be on visible part of Canvas // maxN_X := Math.Floor(canvasWidth / (elementWidth + leftDist + rightDist)); end; procedure TGoodsOfMonth.resizeView(aBrowserWidth: integer); begin if aBrowserWidth > rightWidthBorder then begin setView(bigView); end else if (aBrowserWidth > leftWidthBorder) and (aBrowserWidth <= rightWidthBorder) then begin setView(middleView); end else if aBrowserWidth < leftWidthBorder then begin setView(smallView); end; end; procedure TGoodsOfMonth.SetOL(const Value: TObjectList<TGoodsOfMonthElement>); begin FOL := Value; end; procedure TGoodsOfMonth.setView(aView: TView); begin if aView = smallView then begin PositionElements; end; if aView = middleView then begin PositionElements; end; if aView = bigView then begin PositionElements; end; end; procedure TGoodsOfMonth.UniFrameCreate(Sender: TObject); procedure addElement(); var i: integer; begin i := FOL.Add(TGoodsOfMonthElement.Create(Self)); FOL[i].Parent := pContent; FOL[i].Name := FOL[i].Name + FNameCount.ToString; FOL[i].pGoodOfMonth.Caption := FNameCount.ToString; inc(FNameCount); end; var i: Integer; begin FLeftIndex := 0; FOL := TObjectList<TGoodsOfMonthElement>.create(true); for i := 0 to 10 do addElement(); end; procedure TGoodsOfMonth.UniFrameDestroy(Sender: TObject); begin FOL.Free; end; end. |
Код модуля плитки
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unit uGoodsOfMonthElement; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, uniGUITypes, uniGUIAbstractClasses, uniGUIClasses, uniGUIFrame, uniGUIBaseClasses, uniPanel; type TGoodsOfMonthElement = class(TUniFrame) pGoodOfMonth: TUniPanel; private { Private declarations } public { Public declarations } end; implementation {$R *.dfm} end. |