(*
    Copyright 2021, 2022 Anton Krotov

    This file is part of fb2read.

    fb2read is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    fb2read 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.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with fb2read. If not, see <http://www.gnu.org/licenses/>.
*)

MODULE Toolbar;

IMPORT
	Icons, K := SysUtils;

CONST
	max = 14;

    BtnSize* = 26;
    BtnInter = 5;
    DelimSize = 7;
    IconPad = (BtnSize - Icons.SIZE) DIV 2;

TYPE
	tButtonText = ARRAY 4 OF CHAR;

	tButton = RECORD
		btn, icon, x: INTEGER;
		text: tButtonText;
		enabled: BOOLEAN
	END;

	tToolbar* = RECORD
		buttons: ARRAY max OF tButton;
		x, y, cnt, width: INTEGER;
		icons, grayIcons: INTEGER;
		colors: RECORD back, text, disText, light, shadow, window: INTEGER	END
	END;


PROCEDURE drawIcons* (toolbar: tToolbar);
VAR
	i, icons, color: INTEGER;
	button: tButton;
BEGIN
	i := 0;
	WHILE i < toolbar.cnt DO
		button := toolbar.buttons[i];
		IF button.btn # 0 THEN
			IF button.enabled THEN
				icons := toolbar.icons;
				color := toolbar.colors.text
			ELSE
				icons := toolbar.grayIcons;
				color := toolbar.colors.disText
			END;
			IF button.icon # -1 THEN
				Icons.draw(icons, button.icon, button.x + IconPad, toolbar.y + IconPad)
			ELSE
			    K.DrawRect(button.x + 1, toolbar.y + 1, BtnSize - 1, BtnSize - 1, toolbar.colors.back);
    			K.DrawText69(button.x + (BtnSize - LENGTH(button.text)*6) DIV 2, toolbar.y + (BtnSize - 9) DIV 2 + 2, color, button.text)
			END
		END;
		INC(i)
	END
END drawIcons;


PROCEDURE setColors (VAR toolbar: tToolbar);
BEGIN
	toolbar.colors.back    := 0F2EFECH;
	toolbar.colors.text    := 00000FFH;
	toolbar.colors.disText := 0808080H;
	toolbar.colors.light   := 0FEFEFEH;
	toolbar.colors.shadow  := 09F9C9AH;
	toolbar.colors.window  := K.winColor
END setColors;


PROCEDURE draw* (VAR toolbar: tToolbar);
VAR
	i, x, y, btn: INTEGER;
	button: tButton;
BEGIN
	setColors(toolbar);
	Icons.get(toolbar.icons, toolbar.grayIcons, toolbar.colors.back);
	i := 0;
	WHILE i < toolbar.cnt DO
		button := toolbar.buttons[i];
		btn := button.btn;
		IF btn # 0 THEN
			x := button.x;
			y := toolbar.y;
			K.DrawRect(x + 1, y + 1, BtnSize, BtnSize - 1, toolbar.colors.back);
			K.DrawLine(x + 1, y + BtnSize, x + BtnSize - 1, y + BtnSize, toolbar.colors.shadow);
			K.DrawLine(x + 1, y, x + BtnSize  - 1, y, toolbar.colors.light);
			K.DrawLine(x, y + 1, x, y + BtnSize - 1, toolbar.colors.light);
			K.PutPixel(x + BtnSize, y + 1, toolbar.colors.light);
			K.PutPixel(x, y + BtnSize - 1, toolbar.colors.shadow);
			K.PutPixel(x + BtnSize, y + BtnSize - 1, toolbar.colors.shadow);
			K.CreateButton(btn + ORD({30}), x, y, BtnSize, BtnSize, 0, "")
		END;
		INC(i)
	END;
	drawIcons(toolbar)
END draw;


PROCEDURE enable* (VAR toolbar: tToolbar; btn: INTEGER; value: BOOLEAN);
VAR
	i: INTEGER;
BEGIN
	i := 0;
	WHILE (i < toolbar.cnt) & (toolbar.buttons[i].btn # btn) DO
		INC(i)
	END;
	IF i < toolbar.cnt THEN
		toolbar.buttons[i].enabled := value
	END
END enable;


PROCEDURE add* (VAR toolbar: tToolbar; btn, icon: INTEGER; text: tButtonText);
VAR
	button: tButton;
BEGIN
	ASSERT(toolbar.cnt < max);
	button.btn := btn;
	button.icon := icon;
	button.x := toolbar.width + toolbar.x;
	button.text := text;
	button.enabled := TRUE;
	toolbar.buttons[toolbar.cnt] := button;
	INC(toolbar.cnt);
	IF btn # 0 THEN
		INC(toolbar.width, BtnSize + BtnInter)
	ELSE
		INC(toolbar.width, DelimSize)
	END
END add;


PROCEDURE delimiter* (VAR toolbar: tToolbar);
BEGIN
	add(toolbar, 0, 0, "")
END delimiter;


PROCEDURE create* (VAR toolbar: tToolbar; x, y: INTEGER);
BEGIN
	toolbar.x := x;
	toolbar.y := y;
	toolbar.cnt := 0;
	toolbar.width := 0
END create;


END Toolbar.