{ fpGUI - Free Pascal GUI Toolkit Copyright (C) 2006 - 2010 See the file AUTHORS.txt, included in this distribution, for details of the copyright. See the file COPYING.modifiedLGPL, included in this distribution, for details about redistributing fpGUI. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Description: This is where all style related types should be defined. The base Style class should also be defined here. This is still work in progress! } unit fpg_style; {$mode objfpc}{$H+} {.$Define DEBUG} interface uses Classes, SysUtils, fpg_base, fpg_main, fpg_widget; type TfpgPrimitiveElement = ( peFocusRectangle, // The focus rectangle pePanel, // Generic bevel of a panel pePanelButton, // Panel are of standard button pePanelButtonBevel, // The bevel of a button pePanelEditBox, // Frame around a text edit box pePanelToolbarButton, // Panel area of a toolbar button pePanelMenuBar, // The menu bar panel pePanelScrollAreaCorner, // Panel at the bottom right corner of the scroll area peFrameMenu, // Frame for popup windows and menus peFrameDefaultButton, // Frame around a default button like in a dialog peFrameToolbarButton, // Frame around a toolbar button peFramePageControl, // Frame for a Page Control peIndicatorArrowUp, // Generic up arrow peIndicatorArrowDown, // Generic down arrow peIndicatorArrowRight, // Generic right arrow peIndicatorArrowLeft, // Generic left arrow peIndicatorCheckBox, // On/off indicator used in a CheckBox peIndicatorRadioButton, // Exclusive on indicator used in a Radio Button peIndicatorHeaderArrow, // Indicator used in List or Tabel header to show sorting peIndicatorMenuCheckMark, // Check mark used in menus peIndicatorProgressBar // Body section of a Progress Bar ); TfpgControlElement = ( cePushButton, // The Bevel, Label and FocusRect cePushButtonBevel, cePushButtonLabel, ceRadioButton, // Indicator, FocusRect and Label ceRadioButtonLabel, ceCheckBox, // Indicator, FocusRect and Label ceCheckBoxLabel, ceMenuItem, ceMenuBarItem, ceMenuBarEmptyArea, ceMenuTearOff, ceMenuHMargin, ceMenuVMargin, ceProgressBar, cePageControlTab, // Both the Shape and Label cePageControlShape, cePageControlLabel ); TfpgStyleOptionEnum = ( soDefault, soFocusRect, soButton, soComboBox, soCheckBox, soMenuItem, soTrackBar, soPanel, soComplex ); TfpgStateItem = ( stNone, stActive, stReadOnly, stSelected, stRaised, stLowered, stHasFocus, stEnabled ); TfpgState = set of TfpgStateItem; TfpgStandardPixmap = ( spMessageBoxInformation, spMessageBoxCritical, spMessageBoxError, spMessageBoxWarning, spMessageBoxQuestion, spDirOpenIcon, spDirCloseIcon, spDirIcon, spDirLinkIcon, spFileIcon, spFileLinkIcon, spFileDialogToParent, // Icon of back to parent dir spFileDialogNewFolder, spDialogOkButton, spDialogCancelButton, spDialogHelpButton, spDialogSaveButton, spDialogOpenButton, spDialogCloseButton, spDialogApplyButton, spDialogResetButton, spDialogDiscardButton, spDialogYesButton, spDialogNoButton ); // Just a data class TfpgStyleOption = class(TObject) private FRect: TfpgRect; FState: TfpgState; FStyleOption: TfpgStyleOptionEnum; public property StyleOption: TfpgStyleOptionEnum read FStyleOption write FStyleOption; property Rect: TfpgRect read FRect write FRect; property State: TfpgState read FState write FState; end; TfpgButtonFeatures = set of (bfNone, bfFlat, bfDefault, bfEmbedded); // Button specific options TfpgButtonStyleOption = class(TfpgStyleOption) private FButtonFeatures: TfpgButtonFeatures; public property ButtonFeatures: TfpgButtonFeatures read FButtonFeatures write FButtonFeatures; end; TfpgBaseStyle = class(TObject) public procedure DrawControl(element: TfpgControlElement; const option: TfpgStyleOption; canvas: TfpgCanvas; widget: TfpgWidget = nil); virtual; abstract; procedure DrawPrimitive(element: TfpgPrimitiveElement; const option: TfpgStyleOption; canvas: TfpgCanvas; widget: TfpgWidget = nil); virtual; abstract; end; //----------------------------------------- // The classes below will be better placed in their own units! // This class encapsulates the common look and feel of the GUI TfpgCommonStyle = class(TfpgBaseStyle) public procedure DrawControl(element: TfpgControlElement; const option: TfpgStyleOption; canvas: TfpgCanvas; widget: TfpgWidget=nil); override; procedure DrawPrimitive(element: TfpgPrimitiveElement; const option: TfpgStyleOption; canvas: TfpgCanvas; widget: TfpgWidget=nil); override; end; // The Windows 2000 look TfpgWin2000Style = class(TfpgCommonStyle) end; TfpgWinXPStyle = class(TfpgCommonStyle) end; // This class provides a widgte style similar to the classic BlueCurve theme // originally created by Red Hat. TfpgBlueCurveStyle = class(TfpgCommonStyle) end; // This class provides a widget style similar to GNOME TfpgClearLookStyle = class(TfpgCommonStyle) end; // For the die-hard unix fans! TfpgMotifStyle = class(TfpgCommonStyle) end; implementation { TfpgCommonStyle } procedure TfpgCommonStyle.DrawControl(element: TfpgControlElement; const option: TfpgStyleOption; canvas: TfpgCanvas; widget: TfpgWidget); var r: TfpgRect; begin // Do common things here case element of cePushButtonBevel: begin {$IFDEF DEBUG} writeln('TfpgCommonStyle.DrawControl: cePushButtonBevel'); {$ENDIF} r.SetRect(option.Rect.Left, option.Rect.Top, option.Rect.Width, option.Rect.Height); if bfDefault in TfpgButtonStyleOption(option).ButtonFeatures then begin Canvas.SetColor(clBlack); Canvas.SetLineStyle(1, lsSolid); Canvas.DrawRectangle(r); InflateRect(r, -1, -1); end; // Canvas.SetColor(clButtonFace); // Canvas.SetLineStyle(1, lsSolid); // Canvas.FillRectangle(r.Left, r.Top, r.Width, r.Height); // Left and Top (outer) if stLowered in option.State then begin if bfEmbedded in TfpgButtonStyleOption(option).ButtonFeatures then Canvas.SetColor(clHilite1) else Canvas.SetColor(clShadow2); end else Canvas.SetColor(clHilite1); Canvas.DrawLine(r.Left, r.Bottom, r.Left, r.Top); // left Canvas.DrawLine(r.Left, r.Top, r.Right, r.Top); // top // Right and Bottom (outer) if stLowered in option.State then begin if bfEmbedded in TfpgButtonStyleOption(option).ButtonFeatures then Canvas.SetColor(clHilite1) else Canvas.SetColor(clShadow2); end else Canvas.SetColor(clShadow2); Canvas.DrawLine(r.Right, r.Top, r.Right, r.Bottom); // right Canvas.DrawLine(r.Right, r.Bottom, r.Left-1, r.Bottom); // bottom // Right and Bottom (inner) if stLowered in option.State then begin if bfEmbedded in TfpgButtonStyleOption(option).ButtonFeatures then Canvas.SetColor(clButtonFace) else Canvas.SetColor(clHilite1); end else Canvas.SetColor(clShadow1); Canvas.DrawLine(r.Right-1, r.Top+1, r.Right-1, r.Bottom-1); // right Canvas.DrawLine(r.Right-1, r.Bottom-1, r.Left, r.Bottom-1); // bottom end { cePushButtonBevel } end; end; procedure TfpgCommonStyle.DrawPrimitive(element: TfpgPrimitiveElement; const option: TfpgStyleOption; canvas: TfpgCanvas; widget: TfpgWidget); var r: TfpgRect; begin // Do common things here. It's going to be a huge case statement. This design // allows us to add new controls or elements without having to instantly // implement them in all descendant classes! case element of peFocusRectangle: begin {$IFDEF DEBUG} writeln('TfpgCommonStyle.DrawPrimitive: peFocusRectangle'); {$ENDIF} if stHasFocus in option.State then begin r.SetRect(option.Rect.Left, option.Rect.Top, option.Rect.Width, option.Rect.Height); InflateRect(r, -3, -3); Canvas.DrawFocusRect(r); end; end; { peFocusRectangle } peIndicatorRadioButton: begin // just an example!!!!!!!! {$IFDEF DEBUG} writeln('TfpgCommonStyle.DrawPrimitive: peIndicatorRadioButton'); {$ENDIF} Canvas.SetColor(clShadow1); Canvas.DrawArc(option.Rect.Left, option.Rect.Top, option.Rect.Width, option.Rect.Height, 0, 180); Canvas.SetColor(clHilite1); Canvas.DrawArc(option.Rect.Left, option.Rect.Top, option.Rect.Width, option.Rect.Height, 180, 0); end; { peIndicatorRadioButton } end; end; end.