tab.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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.
 *
 * 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef GUI_WIDGETS_TAB_H
#define GUI_WIDGETS_TAB_H

#include "gui/widget.h"
#include "common/str.h"
#include "common/array.h"

namespace GUI {

enum {
    kTabForwards = 1,
    kTabBackwards = -1
};

class TabWidget : public Widget {
    struct Tab {
        Common::U32String title;
        Common::String dialogName;
        Widget *firstWidget;
        int _tabWidth;
    };
    typedef Common::Array<Tab> TabList;

protected:
    int _activeTab;
    int _firstVisibleTab;
    int _lastVisibleTab;
    TabList _tabs;
    int _tabHeight;
    int _minTabWidth;
    int _titleSpacing;

    ThemeEngine::TextAlignVertical _alignV;

    int _bodyRP, _bodyTP, _bodyLP, _bodyBP;
    ThemeEngine::DialogBackground _bodyBackgroundType;

    int _titleVPad;

    int _butRP, _butTP, _butW, _butH;

    ButtonWidget *_navLeft, *_navRight;
    bool _navButtonsVisible;
    int _lastRead;

    void recalc();

public:
    TabWidget(GuiObject *boss, int x, int y, int w, int h, ThemeEngine::TextAlignVertical alignV = ThemeEngine::kTextAlignVTop);
    TabWidget(GuiObject *boss, const Common::String &name, ThemeEngine::TextAlignVertical alignV = ThemeEngine::kTextAlignVTop);
    ~TabWidget() override;

    void init();

    int addTab(const Common::U32String &title, const Common::String &dialogName);

    void removeTab(int tabID);

    int getActiveTab() {
        return _activeTab;
    }

    void setActiveTab(int tabID);

    void setTabTitle(int tabID, const Common::U32String &title) {
        assert(0 <= tabID && tabID < (int)_tabs.size());
        _tabs[tabID].title = title;
    }

    void handleMouseDown(int x, int y, int button, int clickCount) override;
    void handleMouseMoved(int x, int y, int button) override;
    void handleMouseLeft(int button) override { _lastRead = -1; };
    bool handleKeyDown(Common::KeyState state) override;
    void handleMouseWheel(int x, int y, int direction) override;
    void handleCommand(CommandSender *sender, uint32 cmd, uint32 data) override;
    virtual int getFirstVisible() const;
    virtual void setFirstVisible(int tabID, bool adjustIfRoom = false);

    bool containsWidget(Widget *) const override;

    void reflowLayout() override;

    void draw() override;
    void markAsDirty() override;

protected:
    // We overload getChildY to make sure child widgets are positioned correctly.
    // Essentially this compensates for the space taken up by the tab title header.
    int16 getChildY() const override;
    uint16 getHeight() const override;

    void drawWidget() override;

    Widget *findWidget(int x, int y) override;

    virtual void adjustTabs(int value);

    virtual void computeLastVisibleTab(bool adjustFirstIfRoom);
};

} // End of namespace GUI

#endif