From f7bdf8448c3ea0fcb07a1dffb14c5811d4e91079 Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Mon, 28 Sep 2015 17:47:49 +0200 Subject: Add Layout machanism. --- plugingui/Makefile.am.plugingui | 1 + plugingui/layout.cc | 175 ++++++++++++++++++++++++++++++++++++++++ plugingui/layout.h | 125 ++++++++++++++++++++++++++++ plugingui/widget.h | 3 +- 4 files changed, 303 insertions(+), 1 deletion(-) create mode 100644 plugingui/layout.cc create mode 100644 plugingui/layout.h diff --git a/plugingui/Makefile.am.plugingui b/plugingui/Makefile.am.plugingui index b1698e4..e2969f0 100644 --- a/plugingui/Makefile.am.plugingui +++ b/plugingui/Makefile.am.plugingui @@ -22,6 +22,7 @@ PLUGIN_GUI_SOURCES = \ $(top_srcdir)/plugingui/checkbox.cc \ $(top_srcdir)/plugingui/slider.cc \ $(top_srcdir)/plugingui/scrollbar.cc \ + $(top_srcdir)/plugingui/layout.cc \ $(top_srcdir)/plugingui/listbox.cc \ $(top_srcdir)/plugingui/listboxthin.cc \ $(top_srcdir)/plugingui/listboxbasic.cc \ diff --git a/plugingui/layout.cc b/plugingui/layout.cc new file mode 100644 index 0000000..f12887e --- /dev/null +++ b/plugingui/layout.cc @@ -0,0 +1,175 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * layout.cc + * + * Sat Mar 21 15:12:36 CET 2015 + * Copyright 2015 Bent Bisballe Nyeng + * deva@aasimon.org + ****************************************************************************/ + +/* + * This file is part of DrumGizmo. + * + * DrumGizmo 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 2 of the License, or + * (at your option) any later version. + * + * DrumGizmo 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 DrumGizmo; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#include "layout.h" + +#include "widget.h" + +namespace GUI { + +LayoutItem::LayoutItem() + : parent(nullptr) +{ +} + +LayoutItem::~LayoutItem() +{ + setLayoutParent(nullptr); // Will disconnect from layout if any. +} + +void LayoutItem::setLayoutParent(Layout *p) +{ + if(this->parent) + { + this->parent->removeItem(this); + } + + this->parent = p; +} + +Layout::Layout(LayoutItem *parent) +{ + this->parent = parent; +} + +void Layout::addItem(LayoutItem *item) +{ + items.push_back(item); + item->setLayoutParent(this); + layout(); +} + +void Layout::removeItem(LayoutItem *item) +{ + LayoutItemList::iterator i = items.begin(); + while(i != items.end()) + { + if(*i == item) + { + i = items.erase(i); + continue; + } + ++i; + } + + layout(); +} + +// +// BoxLayout +// + +BoxLayout::BoxLayout(LayoutItem *parent) + : Layout(parent) +{ + resize_children = true; +} + +void BoxLayout::setResizeChildren(bool resize_children) +{ + this->resize_children = resize_children; +} + +// +// VBoxLayout +// + +VBoxLayout::VBoxLayout(LayoutItem *parent) + : BoxLayout(parent), align(HALIGN_CENTER) +{ +} + +void VBoxLayout::layout() +{ + size_t y = 0; + size_t w = parent->width(); + size_t h = parent->height() / items.size(); + + LayoutItemList::iterator i = items.begin(); + while(i != items.end()) + { + LayoutItem *item = *i; + if(resize_children)item->resize(w, h); + item->move(0, y); + y += h; + ++i; + } +} + +// +// HBoxLayout +// + +HBoxLayout::HBoxLayout(LayoutItem *parent) + : BoxLayout(parent) + , align(VALIGN_CENTER) +{ +} + +void HBoxLayout::layout() +{ + size_t w = parent->width() / items.size(); + size_t h = parent->height(); + size_t x = 0; + + LayoutItemList::iterator i = items.begin(); + while(i != items.end()) + { + LayoutItem *item = *i; + if(resize_children) + { + item->resize(w, h); + item->move(x, 0); + } + else + { + size_t y = 0; + switch(align) { + case VALIGN_TOP: + y = 0; + break; + case VALIGN_CENTER: + y = (h / 2) - (item->height() / 2); + break; + case VALIGN_BOTTOM: + y = h - item->height(); + break; + } + + int diff = w - item->width(); + item->move(x + diff / 2, y); + } + x += w; + ++i; + } +} + +void HBoxLayout::setVAlignment(alignment_t alignment) +{ + align = alignment; +} + +} // GUI:: diff --git a/plugingui/layout.h b/plugingui/layout.h new file mode 100644 index 0000000..a81f004 --- /dev/null +++ b/plugingui/layout.h @@ -0,0 +1,125 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * layout.h + * + * Sat Mar 21 15:12:36 CET 2015 + * Copyright 2015 Bent Bisballe Nyeng + * deva@aasimon.org + ****************************************************************************/ + +/* + * This file is part of DrumGizmo. + * + * DrumGizmo 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 2 of the License, or + * (at your option) any later version. + * + * DrumGizmo 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 DrumGizmo; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#pragma once + +#include +#include + +namespace GUI { + +class Layout; + +class LayoutItem { +public: + LayoutItem(); + virtual ~LayoutItem(); + + void setLayoutParent(Layout *parent); + + virtual void resize(int width, int height) = 0; + virtual void move(size_t x, size_t y) = 0; + virtual size_t x() = 0; + virtual size_t y() = 0; + virtual size_t width() = 0; + virtual size_t height() = 0; + +private: + Layout *parent; +}; + +//! \brief Abtract Layout class. +class Layout +{ +public: + Layout(LayoutItem *parent); + virtual ~Layout() {} + + virtual void addItem(LayoutItem *item); + virtual void removeItem(LayoutItem *item); + + //! \brief Reimplement this method to create a new Layout rule. + virtual void layout() = 0; + +protected: + LayoutItem *parent; + typedef std::list LayoutItemList; + LayoutItemList items; +}; + +//! \brief Abstract box layout +class BoxLayout : public Layout { +public: + BoxLayout(LayoutItem *parent); + + //! \brief Set to false to only move the items, not scale them. + void setResizeChildren(bool resize_children); + + virtual void layout() = 0; + +protected: + bool resize_children; +}; + +//! \brief A Layout that lays out its elements vertically. +class VBoxLayout : public BoxLayout { +public: + VBoxLayout(LayoutItem *parent); + + typedef enum { + HALIGN_LEFT, + HALIGN_CENTER, + HALIGN_RIGHT, + } alignment_t; + + void setHAlignment(alignment_t alignment); + + virtual void layout(); + +protected: + alignment_t align; +}; + +//! \brief A Layout that lays out its elements vertically. +class HBoxLayout : public BoxLayout { +public: + HBoxLayout(LayoutItem *parent); + + typedef enum { + VALIGN_TOP, + VALIGN_CENTER, + VALIGN_BOTTOM, + } alignment_t; + + void setVAlignment(alignment_t alignment); + + virtual void layout(); + +protected: + alignment_t align; +}; + +} // GUI:: diff --git a/plugingui/widget.h b/plugingui/widget.h index 10b221a..32acd5c 100644 --- a/plugingui/widget.h +++ b/plugingui/widget.h @@ -29,6 +29,7 @@ #include "guievent.h" #include "pixelbuffer.h" #include "notifier.h" +#include "layout.h" #include @@ -36,7 +37,7 @@ namespace GUI { class Window; -class Widget : public Listener { +class Widget : public Listener, LayoutItem { public: Widget(Widget *parent); virtual ~Widget(); -- cgit v1.2.3