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uMain.pas
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uMain.pas
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unit uMain;
interface
uses
System.Classes
, System.Skia
, System.SysUtils
, System.Types
, System.UITypes
, System.Variants
, FMX.Ani
, FMX.Controls
, FMX.Controls.Presentation
, FMX.Dialogs
, FMX.Forms
, FMX.Graphics
, FMX.Layouts
, FMX.MediaLibrary
, FMX.MultiView
, FMX.Objects
, FMX.StdCtrls
, FMX.Skia
, FMX.Types
;
type
TfrmMain = class(TForm)
layoutRoot: TLayout;
barTop: TToolBar;
mviewMenu: TMultiView;
bookImpressiveDark: TStyleBook;
lblTopTitle: TLabel;
svgMVFileOpen: TSkSvg;
lblMVFileOpenCaption: TLabel;
svgMVFileSave: TSkSvg;
lblMVFileSaveCaption: TLabel;
circleMVFileSaveCircle: TCircle;
aniMVFileSaveEffect: TFloatAnimation;
circleMVFileOpenCircle: TCircle;
aniMVFileOpenEffect: TFloatAnimation;
svgTopClose: TSkSvg;
svgTopOpen: TSkSvg;
svgMVOpEraser: TSkSvg;
lblMVOpEraser: TLabel;
svgMVOpMove: TSkSvg;
lblMVOpMove: TLabel;
btnTopMV: TButton;
dlgOpen: TOpenDialog;
rectWaiterBase: TRectangle;
aniWaitor: TAniIndicator;
pnlOpBase: TPanel;
layoutOpEraserBase: TLayout;
layoutOpMoveBase: TLayout;
svgZoomIn: TSkSvg;
svgZoomOut: TSkSvg;
layoutOpZoomBase: TLayout;
layoutOpZoomUpBase: TLayout;
layoutOpZoomDownBase: TLayout;
lblOpZoomBy: TLabel;
scrollHBar: TScrollBar;
layoutScrollBase: TLayout;
scrollVBar: TScrollBar;
rectSelector: TRectangle;
imgImage: TImage;
layoutImageBase: TLayout;
trackDiameter: TTrackBar;
pnlTopBase: TPanel;
dlgSave: TSaveDialog;
procedure FormCreate(Sender: TObject);
procedure btnTopMVApplyStyleLookup(Sender: TObject);
procedure FormKeyDown(Sender: TObject; var Key: Word; var KeyChar: WideChar;
Shift: TShiftState);
procedure FormKeyUp(Sender: TObject; var Key: Word; var KeyChar: WideChar;
Shift: TShiftState);
procedure scrollVBarChange(Sender: TObject);
procedure scrollHBarChange(Sender: TObject);
procedure layoutScrollBaseResize(Sender: TObject);
procedure layoutImageBaseMouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Single);
procedure layoutImageBaseMouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Single);
procedure FormDestroy(Sender: TObject);
procedure layoutImageBaseGesture(Sender: TObject;
const EventInfo: TGestureEventInfo; var Handled: Boolean);
procedure mviewMenuStartShowing(Sender: TObject);
procedure mviewMenuHidden(Sender: TObject);
private type
TToolType = (Move, Eraser);
private var
FIsDesktop: Boolean;
FTool: TToolType;
FLastDistance: Single;
FScreenScale: Single;
FZoomScale: Single;
FSetImageSizeProcessing: Boolean;
FSpacePressed: Boolean;
FHScrollbarValue: Single;
FVScrollbarValue: Single;
FOldPos: TPointF;
FDiameter: Single;
FAlphaBitmap: TBitmap;
private
procedure ShowWaiter;
procedure HideWaiter;
function CalcPos(const AX, AY: Single): TPointF;
procedure InitScrollBar;
procedure SetImageSize;
procedure SetZoomScale(const AZoomScale: Single);
procedure SetTool(const ALayout: TLayout; const ATool: TToolType);
procedure SetMVButtonVisible(const AOpened: Boolean);
procedure TakePhotoFinishHandler(AImage: TBitmap);
procedure FileOpenClickHandler(Sender: TObject);
procedure FileSaveClickHandler(Sender: TObject);
procedure OpMoveClickHandler(Sender: TObject);
procedure OpEraserClickHandler(Sender: TObject);
procedure ZoomOutClickHandler(Sender: TObject);
procedure ZoomInClickHandler(sender: TObject);
public
end;
var
frmMain: TfrmMain;
implementation
{$R *.fmx}
uses
System.Math
, FMX.Platform
, PK.Graphic.BitmapCodecManagerHelper
, PK.Storage.Utils
, PK.Storage.Permission
, PK.Utils.Dialogs
, uSVGButton
{$IFDEF ANDROID}
, Androidapi.Helpers
, Androidapi.Jni.App
{$ENDIF}
;
procedure TfrmMain.btnTopMVApplyStyleLookup(Sender: TObject);
begin
// ボタンの押下エフェクトを消す
for var C in btnTopMV.Children do
if C is TEllipse then
begin
TEllipse(C).Visible := False;
Break;
end
end;
function TfrmMain.CalcPos(const AX, AY: Single): TPointF;
begin
// Desktop は仮想解像度なので座標の計算にスクリーンスケールは不要
var S := {$IF defined(ANDROID) or defined(IOS)}FScreenScale{$ELSE}1{$ENDIF};
Result.X := (FHScrollbarValue + AX) * S / FZoomScale;
Result.Y := (FVScrollbarValue + AY) * S / FZoomScale;
end;
procedure TfrmMain.FileOpenClickHandler(Sender: TObject);
begin
var Service: IFMXTakenImageService;
if
TPlatformServices.Current.SupportsPlatformService(
IFMXTakenImageService,
Service
)
then
begin
// モバイル環境では IFMXTakenImageService を使って画像を取得
var P: TParamsPhotoQuery;
P.RequiredResolution := TSize.Create($ffff, $ffff);
P.Editable := True;
P.NeedSaveToAlbum := False;
P.PickerPresentation := TPickerPresentation.Latest;
P.OnDidFinishTaking := TakePhotoFinishHandler;
P.OnDidCancelTaking := nil;
P.OnDidFailTaking := nil;
ShowWaiter;
try
mviewMenu.HideMaster;
Service.TakeImageFromLibrary(nil, P);
InitScrollBar;
finally
HideWaiter;
end;
end
else
begin
// デスクトップ環境ではファイルダイアログで画像を取得
if FIsDesktop and dlgOpen.Execute then
begin
ShowWaiter;
TThread.CreateAnonymousThread(
procedure
begin
try
imgImage.Bitmap.LoadFromFile(dlgOpen.FileName);
finally
TThread.Synchronize(
nil,
procedure
begin
InitScrollBar;
mviewMenu.HideMaster;
HideWaiter;
end
);
end;
end
).Start;
end;
end;
end;
procedure TfrmMain.FileSaveClickHandler(Sender: TObject);
begin
if not imgImage.Bitmap.IsEmpty then
begin
ShowWaiter;
if FIsDesktop then
begin
// デスクトップ環境では保存ダイアログで保存先を選択
if dlgSave.Execute then
TThread.CreateAnonymousThread(
procedure
begin
try
imgImage.Bitmap.SaveToFile(dlgSave.FileName);
finally
TThread.Synchronize(
nil,
procedure
begin
mviewMenu.HideMaster;
HideWaiter;
end
);
end;
end
).Start
else
HideWaiter;
end
else
begin
// モバイル環境では Shared Pictures に保存
TThread.CreateAnonymousThread(
procedure
begin
try
SaveBitmapToSharedFolder(
imgImage.Bitmap,
'MagicEraser'
);
finally
TThread.Synchronize(
nil,
procedure
begin
mviewMenu.HideMaster;
HideWaiter;
end
);
end;
end
).Start;
end;
end;
end;
procedure TfrmMain.FormCreate(Sender: TObject);
type
TAlphaColorArray = array [0.. 0] of TAlphaColor;
PAlphaColorArray = ^TAlphaColorArray;
const
TRANS_COLORS: array [0.. 1] of TAlphaColor = ($ff_ff_ff_ff, $ff_cc_cc_cc);
begin
// Permission の取得 (Android 11 未満の場合)
RequestStorageAccess(
'画像ファイルの読み書き用に権限が必要です',
procedure(const ASuccess: Boolean)
begin
if not ASuccess then
begin
ShowErrorDialog(
'終了します',
procedure
begin
Close;
end
);
end;
end
);
// ダイアログのフィルター設定
// Open と Save で同じフィルターを使う手抜き実装のため保存出来ない拡張子を削除
dlgOpen.Filter := TBitmapCodecManager.GetDialogFilter(['ico', 'wbmp', 'hdp']);
dlgSave.Filter := dlgOpen.Filter;
layoutImageBase.AutoCapture := True;
// 市松模様画像を作成
FAlphaBitmap := TBitmap.Create(16, 16);
var Data: TBitmapData;
FAlphaBitmap.Map(TMapAccess.Write, Data);
try
for var Y := 0 to Data.Height - 1 do
begin
var Line := PAlphaColorArray(Data.GetScanline(Y));
{$R-}
for var X := 0 to Data.Width - 1 do
Line[X] := TRANS_COLORS[((X xor Y) and %0000_1000) shr 3];
end;
finally
FAlphaBitmap.Unmap(Data);
end;
// TSkSVG をボタンぽく振る舞わせる TSVGButton を生成
TSVGButton.Create(svgMVFileOpen, FileOpenClickHandler);
TSVGButton.Create(svgMVFileSave, FileSaveClickHandler);
TSVGButton.Create(svgMVOpMove, OpMoveClickHandler);
TSVGButton.Create(svgMVOpEraser, OpEraserClickHandler);
TSVGButton.Create(svgZoomOut, ZoomOutClickHandler);
TSVGButton.Create(svgZoomIn, ZoomInClickHandler);
// GUI を初期状態にする
SetMVButtonVisible(mviewMenu.Presenter.Opened);
SetTool(layoutOpMoveBase, TToolType.Move);
InitScrollBar;
// デスクトップかどうかを示すフラグ
FIsDesktop :=
TOSVersion.Platform in
[
TOSVersion.TPlatform.pfWindows,
TOSVersion.TPlatform.pfMacOS,
TOSVersion.TPlatform.pfLinux
];
{ // ドッキングビューにしたい場合はコメントアウト
if FIsDesktop then
mviewMenu.Mode := TMultiViewMode.Panel;
}
// iOS だけ Trackbar コントロールの外観が違うため補正
{$IFDEF IOS}
trackDiameter.Margins.Left := -24;
{$ENDIF}
HideWaiter;
end;
procedure TfrmMain.FormDestroy(Sender: TObject);
begin
// 講師画像を解放
FAlphaBitmap.Free;
end;
procedure TfrmMain.FormKeyDown(
Sender: TObject;
var Key: Word;
var KeyChar: WideChar;
Shift: TShiftState);
begin
// デスクトップ環境ではスペースキーを押しながらドラッグすると
// キャンバスを移動できる
FSpacePressed := FIsDesktop and (KeyChar = #32);
if FSpacePressed then
layoutImageBase.Cursor := crHandPoint;
end;
procedure TfrmMain.FormKeyUp(
Sender: TObject;
var Key: Word;
var KeyChar: WideChar;
Shift: TShiftState);
begin
// スペースキーの解除
FSpacePressed := False;
if layoutImageBase.Cursor = crHandPoint then
layoutImageBase.Cursor := crDefault;
// バックキーが押された時の動作
{$IFDEF ANDROID}
if Key = vkHardwareBack then
begin
Key := 0;
KeyChar := #0;
if mviewMenu.Presenter.Opened then
// ドロワーが開いていたら閉じる
mviewMenu.HideMaster
else
begin
// アプリを裏に回す
TAndroidHelper.Activity.MoveTaskToBack(True);
end;
end;
{$ENDIF}
end;
procedure TfrmMain.HideWaiter;
begin
// 待機グルグルを非表示
rectWaiterBase.Visible := False;
aniWaitor.Enabled := False;
end;
procedure TfrmMain.InitScrollBar;
begin
// スクロールバーを初期化
scrollHBar.Value := 0;
scrollVBar.Value := 0;
SetZoomScale(1);
end;
procedure TfrmMain.layoutImageBaseGesture(
Sender: TObject;
const EventInfo: TGestureEventInfo;
var Handled: Boolean);
begin
// ピンチイン・アウトでズームイン・アウト
if EventInfo.GestureID = igiZoom then
begin
if
(not (TInteractiveGestureFlag.gfBegin in EventInfo.Flags))and
(not (TInteractiveGestureFlag.gfEnd in EventInfo.Flags))
then
begin
var WH := Max(imgImage.Width, imgImage.Height);
var D := Max(WH + (EventInfo.Distance - FLastDistance), 10);
SetZoomScale(FZoomScale * D / WH);
end;
FLastDistance := EventInfo.Distance;
end;
end;
procedure TfrmMain.layoutImageBaseMouseDown(
Sender: TObject;
Button: TMouseButton;
Shift: TShiftState;
X, Y: Single);
begin
// マウスダウンで移動・消しゴムの準備
FHScrollbarValue := scrollHBar.Value;
FVScrollbarValue := scrollVBar.Value;
FScreenScale := Screen.DisplayFromForm(Self).Scale;
FOldPos := CalcPos(X, Y);
FDiameter := trackDiameter.Value;
end;
procedure TfrmMain.layoutImageBaseMouseMove(
Sender: TObject;
Shift: TShiftState;
X, Y: Single);
procedure DragImage;
begin
var Pos := layoutImageBase.PressedPosition;
var DX := (X - Pos.X) / FScreenScale;
var DY := (Y - Pos.Y) / FScreenScale;
scrollHBar.Value := FHScrollbarValue - DX;
scrollVBar.Value := FVScrollbarValue - DY;
end;
begin
if not layoutImageBase.Pressed then
Exit;
var Pos := CalcPos(X, Y);;
// スペースキーが押されていたらモード関係なく移動
if FSpacePressed then
DragImage
else
case FTool of
// 移動モードなら移動
Move:
DragImage;
// 消しゴムモードなら市松模様を描く
Eraser:
if not imgImage.Bitmap.IsEmpty then
with imgImage.Bitmap.Canvas do
begin
BeginScene;
try
Fill.Kind := TBrushKind.None;
Stroke.Thickness := FDiameter;
Stroke.Cap := TStrokeCap.Round;
Stroke.Join := TStrokeJoin.Round;
Stroke.Kind := TBrushKind.Bitmap;
Stroke.Bitmap.Bitmap := FAlphaBitmap;
DrawLine(FOldPos, Pos, 1);
finally
EndScene;
end;
end;
end;
FOldPos := Pos;
end;
procedure TfrmMain.layoutScrollBaseResize(Sender: TObject);
begin
// キャンバスの大きさが変わったとき、スクロールバーの領域を変更
scrollHBar.ViewportSize := layoutScrollBase.Width;
scrollVBar.ViewportSize := layoutScrollBase.Height;
SetImageSize;
end;
procedure TfrmMain.mviewMenuHidden(Sender: TObject);
begin
// ドロワーを開く画像に
SetMVButtonVisible(False);
end;
procedure TfrmMain.mviewMenuStartShowing(Sender: TObject);
begin
// ドロワーを閉じる画像に
SetMVButtonVisible(True);
end;
procedure TfrmMain.OpEraserClickHandler(Sender: TObject);
begin
// 消しゴムに設定
SetTool(layoutOpEraserBase, TToolType.Eraser);
end;
procedure TfrmMain.OpMoveClickHandler(Sender: TObject);
begin
// 移動に設定
SetTool(layoutOpMoveBase, TToolType.Move);
end;
procedure TfrmMain.scrollHBarChange(Sender: TObject);
begin
// スクロールバーの移動に合せてイメージの位置を変更する
SetImageSize;
end;
procedure TfrmMain.scrollVBarChange(Sender: TObject);
begin
// スクロールバーの移動に合せてイメージの位置を変更する
SetImageSize;
end;
procedure TfrmMain.SetImageSize;
begin
if FSetImageSizeProcessing then
Exit;
// 拡大率とスクロールバーの位置に基づいて画像の位置・サイズを設定する
FSetImageSizeProcessing := True;
try
var S := imgImage.Scene.GetSceneScale;
var W := FZoomScale * imgImage.Bitmap.Width / S;
var H := FZoomScale * imgImage.Bitmap.Height / S;
scrollHBar.Max := W;
scrollVBar.Max := H;
scrollHBar.Visible := scrollHBar.ViewportSize < W;
scrollVBar.Visible := scrollVBar.ViewportSize < H;
if not scrollHBar.Visible then
scrollHBar.Value := 0;
if not scrollVBar.Visible then
scrollVBar.Value := 0;
imgImage.SetBounds(-scrollHBar.Value, -scrollVBar.Value, W, H);
finally
FSetImageSizeProcessing := False;
end;
end;
procedure TfrmMain.SetMVButtonVisible(const AOpened: Boolean);
begin
// ドロワーの開閉でアイコンを変更する
svgTopClose.Visible := AOpened;
svgTopOpen.Visible := not AOpened;
end;
procedure TfrmMain.SetTool(const ALayout: TLayout; const ATool: TToolType);
begin
// 移動・消しゴムの選択と選択枠を移動
FTool := ATool;
rectSelector.Parent := ALayout;
end;
procedure TfrmMain.SetZoomScale(const AZoomScale: Single);
begin
// 拡大率を変更
FZoomScale := AZoomScale;
SetImageSize;
lblOpZoomBy.Text := Format('%.1f%%', [FZoomScale * 100]);
end;
procedure TfrmMain.ShowWaiter;
begin
// 待機グルグルの表示
rectWaiterBase.Visible := True;
rectWaiterBase.Align := TAlignLayout.Contents;
rectWaiterBase.BringToFront;
aniWaitor.Enabled := True;
end;
procedure TfrmMain.TakePhotoFinishHandler(AImage: TBitmap);
begin
// 画像取得ハンドラ
imgImage.Bitmap.Assign(AImage);
InitScrollBar;
mviewMenu.HideMaster;
end;
procedure TfrmMain.ZoomInClickHandler(sender: TObject);
begin
// 拡大
SetZoomScale(FZoomScale * 2);
end;
procedure TfrmMain.ZoomOutClickHandler(Sender: TObject);
begin
// 縮小
SetZoomScale(FZoomScale / 2);
end;
end.