lazarus/components/customdrawn/customdrawn_android.pas

unit customdrawn_android;

{$mode objfpc}{$H+}

interface

uses
  // RTL
  Classes, SysUtils, Types,
  // fpimage
  fpcanvas, fpimgcanv, fpimage,
  // LCL -> Use only TForm, TWinControl, TCanvas and TLazIntfImage
  Graphics, Controls, LCLType, LCLIntf, IntfGraphics, LResources,
  //
  customdrawndrawers, customdrawn_common;

type

  { TCDDrawerAndroid }

  TCDDrawerAndroid = class(TCDDrawerCommon)
  private
    bmpCheckbox, bmpCheckboxChecked: TBitmap;
  public
    procedure CreateResources; override;
    procedure LoadResources; override;
    procedure FreeResources; override;
    //procedure LoadFallbackPaletteColors; override;
    function GetDrawStyle: TCDDrawStyle; override;
    // General
    function GetMeasures(AMeasureID: Integer): Integer; override;
{    function GetMeasuresEx(ADest: TCanvas; AMeasureID: Integer;
      AState: TCDControlState; AStateEx: TCDControlStateEx): Integer; virtual; abstract;
    procedure CalculatePreferredSize(ADest: TCanvas; AControlId: TCDControlID;
      AState: TCDControlState; AStateEx: TCDControlStateEx;
      var PreferredWidth, PreferredHeight: integer; WithThemeSpace: Boolean); virtual; abstract;
    function GetColor(AColorID: Integer): TColor; virtual; abstract;
    function GetClientArea(ADest: TCanvas; ASize: TSize; AControlId: TCDControlID;
      AState: TCDControlState; AStateEx: TCDControlStateEx): TRect; virtual; abstract;}
    // General drawing routines
    {procedure DrawFocusRect(ADest: TCanvas; ADestPos: TPoint; ASize: TSize); override;
    procedure DrawRaisedFrame(ADest: TCanvas; ADestPos: TPoint; ASize: TSize); override;
    procedure DrawSunkenFrame(ADest: TCanvas; ADestPos: TPoint; ASize: TSize); override;
    procedure DrawShallowSunkenFrame(ADest: TCanvas; ADestPos: TPoint; ASize: TSize); override;}
    procedure DrawTickmark(ADest: TCanvas; ADestPos: TPoint); override;
    {procedure DrawSlider(ADest: TCanvas; ADestPos: TPoint; ASize: TSize; AState: TCDControlState); override;
    procedure DrawCompactArrow(ADest: TCanvas; ADestPos: TPoint; ADirection: TCDControlState); override;}
    // ===================================
    // Standard Tab
    // ===================================
    // TCDButton
{    procedure DrawButton(ADest: TCanvas; ADestPos: TPoint; ASize: TSize;
      AState: TCDControlState; AStateEx: TCDControlStateEx); override;
    // TCDEdit
    procedure DrawEditBackground(ADest: TCanvas; ADestPos: TPoint; ASize: TSize;
      AState: TCDControlState; AStateEx: TCDEditStateEx); override;}
    // TCDCheckBox
    procedure DrawCheckBoxSquare(ADest: TCanvas; ADestPos: TPoint; ASize: TSize;
      AState: TCDControlState; AStateEx: TCDControlStateEx); override;
  end;

implementation

const
  ANDROID_DPI = 'vldpi';

{procedure TCDButtonDrawerAndroid.DrawToIntfImage(ADest: TFPImageCanvas;
  CDButton: TCDButton);
begin

end;

procedure TCDButtonDrawerAndroid.DrawToCanvas(ADest: TCanvas; CDButton: TCDButton);
var
  //TmpB: TBitmap;
  Str: string;
begin
  // Button shape -> This crashes in Gtk2
{  TmpB.Canvas.Brush.Color := CDButton.Color;
  TmpB.Canvas.Brush.Style := bsSolid;
  TmpB.Canvas.RoundRect(0, 0, TmpB.Width, TmpB.Height, 8, 8);
  CDButton.SetShape(TmpB);
  ADest.Draw(0, 0, TmpB);
  TmpB.Free;
  }

  ADest.Brush.Color := CDButton.Parent.Color;
  ADest.Brush.Style := bsSolid;
  ADest.Pen.Color := ADest.Brush.Color;
  ADest.RecTangle(0, 0, CDButton.Width, CDButton.Height);

  // Button image
  if CDButton.IsDown then
    DrawCDButtonDown(ADest, CDButton.GetRGBBackgroundColor)
  else if CDButton.Focused then
    DrawAndroidButton(ADest, GetAColor(CDButton.Color, 98))
  else
    DrawAndroidButton(ADest, GetAColor(CDButton.Color, 96));

  // Button text
  ADest.Font.Assign(CDButton.Font);
  ADest.Brush.Style := bsClear;
  ADest.Pen.Style := psSolid;
  Str := CDButton.Caption;
  ADest.TextOut((CDButton.Width - ADest.TextWidth(Str)) div 2,
    (CDButton.Height - ADest.TextHeight(Str)) div 2, Str);
end;

initialization
  RegisterButtonDrawer(TCDButtonDrawerAndroid.Create, dsAndroid);}

{ TCDDrawerAndroid }

procedure TCDDrawerAndroid.CreateResources;
begin
  bmpCheckbox := TBitmap.Create;
  bmpCheckboxChecked := TBitmap.Create;
end;

procedure TCDDrawerAndroid.LoadResources;
begin
  bmpCheckbox.LoadFromLazarusResource('android_checkbox');
  bmpCheckboxChecked.LoadFromLazarusResource('android_checkbox_checked');

  // for now hardcoded to ldpi
  ScaleRasterImage(bmpCheckbox, 160, 96);
  ScaleRasterImage(bmpCheckboxChecked, 160, 96);
end;

procedure TCDDrawerAndroid.FreeResources;
begin
  bmpCheckbox.Free;
  bmpCheckboxChecked.Free;
end;

function TCDDrawerAndroid.GetDrawStyle: TCDDrawStyle;
begin
  Result := dsAndroid;
end;

function TCDDrawerAndroid.GetMeasures(AMeasureID: Integer): Integer;
begin
  case AMeasureID of
{  TCDEDIT_LEFT_TEXT_SPACING: Result := 4;
  TCDEDIT_RIGHT_TEXT_SPACING: Result := 3;
  TCDEDIT_TOP_TEXT_SPACING: Result := 3;
  TCDEDIT_BOTTOM_TEXT_SPACING: Result := 3;}
  //
  TCDCHECKBOX_SQUARE_HALF_HEIGHT: Result := 9;
  TCDCHECKBOX_SQUARE_HEIGHT: Result := 18;
{  //
  TCDRADIOBUTTON_CIRCLE_HEIGHT: Result := 15;
  //
  TCDSCROLLBAR_BUTTON_WIDTH: Result := 17;
  TCDSCROLLBAR_LEFT_SPACING: Result := 17;
  TCDSCROLLBAR_RIGHT_SPACING: Result := 17;
  TCDSCROLLBAR_LEFT_BUTTON_POS: Result := 0;
  TCDSCROLLBAR_RIGHT_BUTTON_POS: Result := -17;
  //
  TCDTRACKBAR_LEFT_SPACING: Result := 9;
  TCDTRACKBAR_RIGHT_SPACING: Result := 9;
  TCDTRACKBAR_TOP_SPACING: Result := 5;
  TCDTRACKBAR_FRAME_HEIGHT: Result := 17;
  //
  TCDLISTVIEW_COLUMN_LEFT_SPACING:  Result := 10;
  TCDLISTVIEW_COLUMN_RIGHT_SPACING: Result := 10;
  TCDLISTVIEW_COLUMN_TEXT_LEFT_SPACING:  Result := 5;
  TCDLISTVIEW_LINE_TOP_SPACING: Result := 3;
  TCDLISTVIEW_LINE_BOTTOM_SPACING: Result := 3;}
  else
    Result := inherited GetMeasures(AMeasureID);
  end;
end;

procedure TCDDrawerAndroid.DrawTickmark(ADest: TCanvas; ADestPos: TPoint);
begin
  // Don't draw anything, tickmarks are impressed into the general images
end;

procedure TCDDrawerAndroid.DrawCheckBoxSquare(ADest: TCanvas; ADestPos: TPoint;
  ASize: TSize; AState: TCDControlState; AStateEx: TCDControlStateEx);
begin
  if csfOn in AState then ADest.Draw(0, 0, bmpCheckboxChecked)
  else ADest.Draw(0, 0, bmpCheckbox);
end;

initialization
  {$I customdrawnimages/android.lrs}

  RegisterDrawer(TCDDrawerAndroid.Create, dsAndroid);
end.