delphi – 如何创建一个对话框,如组件允许drop其他控件里面？

这是一个Firemonkey组件，但我可以看到大部分的组件基地是相同的VCL和FMX，所以如果你知道如何你在VCL分享你的知识，它可以最终的解决方案为我的情况。

我使用TPopup作为祖先。它对我来说很方便，因为它保持在窗体/框架上，我可以使用与父类相同的上下文/结构与LiveBindings连线，这对我非常方便。

我需要它的行为正是它的TPopup，作为一个容器。但我需要它看起来更好，有我的具体按钮(我已经创建了一些属性和自动化为我的软件里面)

问题是，我创建一些内部控件，如TLayouts，Tpanels和Tbuttons，使外观如下：(空)

其中的黑色区域是我想要放置的控件，如TEdit和其他人。

我已将所有内部创建的控件设置为Store = false，因此它不会存储在流系统上。这样做，当我放一个TEdit，例如，我得到的是这个(Tedit与aligned = top我需要这个)：

但我期待这：

如果我改变Store = true我可以得到正确的效果，但所有的内部控件暴露在结构面板上，每次我保存窗体和重新打开一切都重复。暴露的内部组件对我来说不是问题，但是重复是，如果我关闭并打开组件10次，我将获得整个内部结构复制10次。

我将尝试显示一些与组件设计相关的代码：

类声明：

[ComponentPlatformsAttribute(pidWin32 or pidWin64 or pidOSX32 or pidioSSimulator or pidioSDevice or pidAndroid)]
  TNaharFMXPopup = class(TPopup,INaharControlAdapter,INaharControl)
  private
  protected
    FpnlMain       : TPanel;
    FlytToolBar    : TLayout;
    FbtnClose      : TButton;
    FbtnSave       : TButton;
    FbtnEdit       : TButton;
    FpnlClientArea : TPanel;
    FlblTitle      : TLabel;
    procedure   Loaded; override;
    procedure   Notification(AComponent: TComponent; Operation: TOperation); override;

constructor Create:

    constructor TNaharFMXPopup.Create(AOwner: TComponent);
    begin
      inherited;

      FpnlMain         := TPanel.Create(Self);
      FlblTitle        := TLabel.Create(Self);
      FlytToolBar      := TLayout.Create(Self);
      FbtnEdit         := TButton.Create(Self);
      FpnlClientArea   := TPanel.Create(Self);
      FbtnClose         := TButton.Create(FlytToolBar);
      FbtnSave          := TButton.Create(FlytToolBar);

      Height         := 382;
      Placement      := TPlacement.Center;
      StyleLookup    := 'combopopupstyle';
      Width          := 300;

      ApplyControlsProp;

    end;

设置内部控件的属性：

procedure TNaharFMXPopup.ApplyControlsProp;
begin
  with FpnlMain do
  begin
    Parent         := Self;
    Align          := TAlignLayout.Client;
    StyleLookup    := 'grouppanel';
    TabOrder       := 0;
    Margins.Bottom := 10;
    Margins.Left   := 10;
    Margins.Right  := 10;
    Margins.Top    := 10;
    Stored         := false;
  end;
  with FlblTitle do
  begin
    Parent         := FpnlMain;
    Text           := 'Título';
    Align          := TAlignLayout.Top;
    Height         := 36;
    StyleLookup    := 'flyouttitlelabel';
    Stored         := false;
  end;
  with FpnlClientArea do
  begin
    Parent         := FpnlMain;
    Align          := TAlignLayout.Client;
    StyleLookup    := 'gridpanel';
    TabOrder       := 0;
    Margins.Bottom := 5;
    Margins.Left   := 5;
    Margins.Right  := 5;
    Margins.Top    := 5;
    Stored         := false;
  end;
  with FlytToolBar do
  begin
    Parent         := FpnlMain;
    Align          := TAlignLayout.Bottom;
    Height         := 50;
    Stored         := false;
  end;
  with FbtnClose do
  begin
    Parent         := FlytToolBar;
    Text           := 'Fecha';
    Align          := TAlignLayout.Left;
    Height         := 50;
    StyleLookup    := 'tilebutton';
    TabOrder       := 0;
    Width          := 70;
    ModalResult    := mrClose;
    Stored         := false;
  end;
  with FbtnEdit do
  begin
    Parent         := FlytToolBar;
    Text           := '';//'Edita';
    Align          := TAlignLayout.Left;
    Height         := 50;
    StyleLookup    := 'tilebutton';
    TabOrder       := 1;
    Width          := 70;
    ModalResult    := mrContinue;
    Stored         := false;
    Enabled        := false;
  end;
  with FbtnSave do
  begin
    Parent         := FlytToolBar;
    Text           := 'Salva';
    Align          := TAlignLayout.Left;
    Height         := 50;
    StyleLookup    := 'tilebutton';
    TabOrder       := 2;
    Width          := 70;
    ModalResult    := mrOk;
    Stored         := false;
  end;
end;

加载：

procedure TNaharFMXPopup.Loaded;
begin
  inherited;

  ApplyControlsProp;
  SetEvents;
end;

我试过以下与通知，试图使插入控件为我的intenal“clientarea”

procedure TNaharFMXPopup.Notification(AComponent: TComponent; Operation: TOperation);
begin
  inherited;
  if (Operation = opInsert) and (csDesigning in ComponentState) then
  begin
    if AComponent.Owner = self then
      if AComponent is TFmxObject then
      begin
        (AComponent as TFmxObject).Parent := FpnlClientArea;
      end;
  end;

end;

但这没有改变。

我曾经问过类似的问题，但我不知道有很多事情创建这样的组件和答案我给了很少帮助，我缺少每个内部组件的父。

现在我试图真正显示我的需要在哪里：我需要放置在我的TPopup对话框中的控件，将是其中的ClientArea的父母。

解决方法

仔细看看单元FMX.TabControl中的TTabControl / TTabItem。这是你完美的例子，因为它基本上需要解决同样的问题。

以下函数是您需要覆盖的：

procedure DoAddObject(const AObject: TFmxObject); override;

当控件添加到控件时调用。覆盖此函数，以便您的控件被添加到FpnlClientArea控件。你会得到类似的东西：

procedure TNaharFMXPopup.DoAddObject(const AObject: TFmxObject);
// ...
begin
  if (FpnlClientArea <> nil) and not AObject.Equals(FpnlClientArea) and not AObject.Equals(ResourceLink) then
  begin
    FpnlClientArea.AddObject(AObject);
  end
  else
    inherited;
end;

确保AObject.Equals也排除了您的其他“未存储”控件。

如果没有DoAddObject覆盖，FMX TabControl将显示与您的组件当前相同的问题。

TPopup不打算接受控制。所以这需要更多的技巧。
这是一个修改版本的单位，为我工作。我添加了几条评论：

unit NaharFMXPopup;

interface

uses
  System.UITypes,System.Variants,System.SysUtils,System.Classes,FMX.Types,FMX.Controls,FMX.Layouts,FMX.StdCtrls;

type
  [ComponentPlatformsAttribute(pidWin32 or pidWin64 or pidOSX32 or pidioSSimulator or pidioSDevice or pidAndroid)]
  TNaharFMXPopup = class(TPopup)
  private
    procedure   ApplyControlsProp;
  protected
    FpnlMain       : TPanel;
    FlytToolBar    : TLayout;
    FbtnClose      : TButton;
    FbtnSave       : TButton;
    FbtnEdit       : TButton;
    FpnlClientArea : TContent; // change to TContent. 
    // For TPanel we'd have to call SetAcceptControls(False),// but that is not easily possible because that is protected
    FlblTitle      : TLabel;
    procedure   Loaded; override;
    procedure   Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure   DoAddObject(const AObject: TFmxObject); override;
  public
    procedure   InternalOnClose(Sender: TObject);
    procedure   InternalOnSave(Sender: TObject);
    procedure   InternalOnEdit(Sender: TObject);
    constructor Create(AOwner: TComponent); override;
    destructor  Destroy; override;
    procedure   SetEvents;
  published
  end;

implementation


{ TNaharFMXPopup }

constructor TNaharFMXPopup.Create(AOwner: TComponent);
begin
  inherited;

  FpnlMain         := TPanel.Create(Self);
  FlblTitle        := TLabel.Create(Self);
  FlytToolBar      := TLayout.Create(Self);
  FbtnEdit         := TButton.Create(Self);
  FpnlClientArea   := TContent.Create(Self); // change to TContent
  FbtnClose         := TButton.Create(FlytToolBar);
  FbtnSave          := TButton.Create(FlytToolBar);

  Height         := 382;
  Placement      := TPlacement.Center;
  StyleLookup    := 'combopopupstyle';
  Width          := 300;

  // A TPopup is not intended to accept controls
  // so we have to undo those restrictions:
  Visible := True;
  SetAcceptsControls(True);

  ApplyControlsProp;
end;

destructor TNaharFMXPopup.Destroy;
begin

  inherited;
end;

procedure TNaharFMXPopup.ApplyControlsProp;
begin
  with FpnlMain do
  begin
    Parent         := Self;
    Align          := TAlignLayout.Bottom;
    StyleLookup    := 'grouppanel';
    TabOrder       := 0;
    Height         := 50;
    Margins.Bottom := 10;
    Margins.Left   := 10;
    Margins.Right  := 10;
    Margins.Top    := 10;
    Stored         := false;
  end;
  with FpnlClientArea do
  begin
    Parent         := Self; // we have to change this to Self (it refuses working if the parent is FPnlMain)
    Align          := TAlignLayout.Client;
    Margins.Left   := 3;
    Margins.Right  := 3;
    Margins.Top    := 3;
    Margins.Bottom := 3;
    Stored         := false;
  end;
  with FlytToolBar do
  begin
    Parent         := FpnlMain;
    Align          := TAlignLayout.Bottom;
    Height         := 50;
    Stored         := false;
  end;
  with FbtnClose do
  begin
    Parent         := FlytToolBar;
    Text           := 'Close';
    Align          := TAlignLayout.Left;
    Height         := 50;
    StyleLookup    := 'tilebutton';
    TabOrder       := 0;
    Width          := 70;
    ModalResult    := mrClose;
    Stored         := false;
  end;
  with FbtnEdit do
  begin
    Parent         := FlytToolBar;
    Text           := '';//'Edita';
    Align          := TAlignLayout.Left;
    Height         := 50;
    StyleLookup    := 'tilebutton';
    TabOrder       := 1;
    Width          := 70;
    ModalResult    := mrContinue;
    Stored         := false;
    Enabled        := false;
  end;
  with FbtnSave do
  begin
    Parent         := FlytToolBar;
    Text           := 'Save';
    Align          := TAlignLayout.Left;
    Height         := 50;
    StyleLookup    := 'tilebutton';
    TabOrder       := 2;
    Width          := 70;
    ModalResult    := mrOk;
    Stored         := false;
  end;
end;

procedure TNaharFMXPopup.Loaded;
begin
  inherited;

  ApplyControlsProp;
//  SetEvents;

end;

procedure TNaharFMXPopup.Notification(AComponent: TComponent;
  Operation: TOperation);
begin
  inherited;

end;

procedure TNaharFMXPopup.InternalOnClose(Sender: TObject);
begin
end;

procedure TNaharFMXPopup.InternalOnEdit(Sender: TObject);
begin
end;

procedure TNaharFMXPopup.InternalOnSave(Sender: TObject);
begin
end;

procedure TNaharFMXPopup.SetEvents;
begin
  FbtnClose.OnClick := InternalOnClose;
  FbtnSave.OnClick := InternalOnSave;
  FbtnEdit.OnClick := InternalOnEdit;
end;


procedure TNaharFMXPopup.DoAddObject(const AObject: TFmxObject);
begin
//inherited; try commenting the block bellow and uncommenting this one
//Exit;

  if (FpnlClientArea <> nil)
    and not AObject.Equals(FpnlClientArea)
    and not AObject.Equals(ResourceLink)
    and not AObject.Equals(FpnlMain)
    and not AObject.Equals(FlblTitle)
    and not AObject.Equals(FlytToolBar)
    and not AObject.Equals(FbtnEdit)
    and not AObject.Equals(FpnlClientArea)
    and not AObject.Equals(FbtnClose)
    and not AObject.Equals(FbtnSave) then

  begin
    FpnlClientArea.AddObject(AObject);
  end
  else
    inherited;
end;

end.

delphi – 如何创建一个对话框,如组件允许drop其他控件里面？

解决方法

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