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https://github.com/salvadordf/CEF4Delphi.git
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140 lines
4.1 KiB
ObjectPascal
140 lines
4.1 KiB
ObjectPascal
unit uCEFScrollView;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$I cef.inc}
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{$IFNDEF TARGET_64BITS}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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System.Classes, System.SysUtils,
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{$ELSE}
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Classes, SysUtils,
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{$ENDIF}
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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes, uCEFView;
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type
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/// <summary>
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/// A ScrollView will show horizontal and/or vertical scrollbars when necessary
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/// based on the size of the attached content view. Methods must be called on
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/// the browser process UI thread unless otherwise indicated.
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/// </summary>
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/// <remarks>
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/// <para><see href="https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/views/cef_scroll_view_capi.h">CEF source file: /include/capi/views/cef_scroll_view_capi.h (cef_scroll_view_t)</see></para>
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/// </remarks>
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TCefScrollViewRef = class(TCefViewRef, ICefScrollView)
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protected
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/// <summary>
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/// Set the content View. The content View must have a specified size (e.g.
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/// via ICefView.SetBounds or ICefViewDelegate.GetPreferredSize).
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/// </summary>
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procedure SetContentView(const view: ICefView);
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/// <summary>
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/// Returns the content View.
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/// </summary>
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function GetContentView : ICefView;
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/// <summary>
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/// Returns the visible region of the content View.
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/// </summary>
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function GetVisibleContentRect : TCefRect;
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/// <summary>
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/// Returns true (1) if the horizontal scrollbar is currently showing.
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/// </summary>
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function HasHorizontalScrollbar : boolean;
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/// <summary>
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/// Returns the height of the horizontal scrollbar.
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/// </summary>
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function GetHorizontalScrollbarHeight : Integer;
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/// <summary>
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/// Returns true (1) if the vertical scrollbar is currently showing.
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/// </summary>
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function HasVerticalScrollbar : boolean;
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/// <summary>
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/// Returns the width of the vertical scrollbar.
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/// </summary>
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function GetVerticalScrollbarWidth : Integer;
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public
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/// <summary>
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/// Returns a ICefScrollView instance using a PCefScrollView data pointer.
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/// </summary>
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class function UnWrap(data: Pointer): ICefScrollView;
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/// <summary>
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/// Create a new ScrollView.
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/// </summary>
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class function CreateScrollView(const delegate: ICefViewDelegate): ICefScrollView;
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end;
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implementation
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uses
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uCEFLibFunctions, uCEFMiscFunctions;
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procedure TCefScrollViewRef.SetContentView(const view: ICefView);
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begin
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PCefScrollView(FData)^.set_content_view(PCefScrollView(FData),
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CefGetData(view));
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end;
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function TCefScrollViewRef.GetContentView : ICefView;
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begin
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Result := TCefViewRef.UnWrap(PCefScrollView(FData)^.get_content_view(PCefScrollView(FData)));
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end;
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function TCefScrollViewRef.GetVisibleContentRect : TCefRect;
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begin
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Result := PCefScrollView(FData)^.get_visible_content_rect(PCefScrollView(FData));
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end;
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function TCefScrollViewRef.HasHorizontalScrollbar : boolean;
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begin
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Result := (PCefScrollView(FData)^.has_horizontal_scrollbar(PCefScrollView(FData)) <> 0);
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end;
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function TCefScrollViewRef.GetHorizontalScrollbarHeight : Integer;
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begin
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Result := PCefScrollView(FData)^.get_horizontal_scrollbar_height(PCefScrollView(FData));
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end;
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function TCefScrollViewRef.HasVerticalScrollbar : boolean;
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begin
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Result := (PCefScrollView(FData)^.has_vertical_scrollbar(PCefScrollView(FData)) <> 0);
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end;
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function TCefScrollViewRef.GetVerticalScrollbarWidth : Integer;
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begin
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Result := PCefScrollView(FData)^.get_vertical_scrollbar_width(PCefScrollView(FData));
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end;
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class function TCefScrollViewRef.UnWrap(data: Pointer): ICefScrollView;
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begin
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if (data <> nil) then
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Result := Create(data) as ICefScrollView
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else
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Result := nil;
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end;
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class function TCefScrollViewRef.CreateScrollView(const delegate: ICefViewDelegate): ICefScrollView;
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var
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TempScrollView : PCefScrollView;
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begin
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Result := nil;
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if (delegate <> nil) then
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begin
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TempScrollView := cef_scroll_view_create(CefGetData(delegate));
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if (TempScrollView <> nil) then
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Result := Create(TempScrollView) as ICefScrollView;
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end;
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end;
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end.
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