411 lines
14 KiB
C++
411 lines
14 KiB
C++
/*
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* Window Layout Implementation
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* Nana C++ Library(http://www.nanapro.org)
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* Copyright(C) 2003-2016 Jinhao(cnjinhao@hotmail.com)
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* @file: nana/gui/detail/window_layout.hpp
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*
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*/
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#include <nana/gui/detail/window_layout.hpp>
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#include <nana/gui/detail/basic_window.hpp>
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#include <nana/gui/detail/native_window_interface.hpp>
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#include <nana/gui/layout_utility.hpp>
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#include <algorithm>
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namespace nana
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{
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namespace detail
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{
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//class window_layout
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void window_layout::paint(core_window_t* wd, bool is_redraw, bool is_child_refreshed)
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{
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if (is_redraw && wd->flags.refreshing)
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return;
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if (nullptr == wd->effect.bground)
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{
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if (is_redraw && (!wd->drawer.graphics.empty()))
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{
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wd->flags.refreshing = true;
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wd->drawer.refresh();
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wd->flags.refreshing = false;
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}
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maproot(wd, is_redraw, is_child_refreshed);
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}
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else
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_m_paint_glass_window(wd, is_redraw, is_child_refreshed, false, true);
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}
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bool window_layout::maproot(core_window_t* wd, bool have_refreshed, bool is_child_refreshed)
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{
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auto check_opaque = wd->seek_non_lite_widget_ancestor();
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if (check_opaque && check_opaque->flags.refreshing)
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return true;
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nana::rectangle vr;
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if (read_visual_rectangle(wd, vr))
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{
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//get the root graphics
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auto& graph = *(wd->root_graph);
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if (category::flags::lite_widget != wd->other.category)
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graph.bitblt(vr, wd->drawer.graphics, nana::point(vr.x - wd->pos_root.x, vr.y - wd->pos_root.y));
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_m_paste_children(wd, is_child_refreshed, have_refreshed, vr, graph, nana::point());
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if (wd->parent)
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{
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std::vector<wd_rectangle> blocks;
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if (read_overlaps(wd, vr, blocks))
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{
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nana::point p_src;
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for (auto & el : blocks)
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{
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if (category::flags::frame == el.window->other.category)
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{
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native_window_type container = el.window->other.attribute.frame->container;
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native_interface::refresh_window(container);
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graph.bitblt(el.r, container);
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}
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else
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{
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p_src.x = el.r.x - el.window->pos_root.x;
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p_src.y = el.r.y - el.window->pos_root.y;
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graph.bitblt(el.r, (el.window->drawer.graphics), p_src);
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}
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_m_paste_children(el.window, is_child_refreshed, false, el.r, graph, nana::point{});
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}
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}
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}
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_m_notify_glasses(wd, vr);
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return true;
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}
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return false;
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}
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void window_layout::paste_children_to_graphics(core_window_t* wd, nana::paint::graphics& graph)
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{
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_m_paste_children(wd, false, false, rectangle{ wd->pos_root, wd->dimension }, graph, wd->pos_root);
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}
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//read_visual_rectangle
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///@brief Reads the visual rectangle of a window, the visual rectangle's reference frame is to root widget,
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/// the visual rectangle is a rectangular block that a window should be displayed on screen.
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/// The result is a rectangle that is a visible area for its ancesters.
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bool window_layout::read_visual_rectangle(core_window_t* wd, nana::rectangle& visual)
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{
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if (! wd->displayed()) return false;
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visual = rectangle{ wd->pos_root, wd->dimension };
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if (wd->root_widget != wd)
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{
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//Test if the root widget is overlapped the specified widget
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//the pos of root widget is (0, 0)
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if (overlapped(visual, rectangle{ wd->root_widget->pos_owner, wd->root_widget->dimension }) == false)
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return false;
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}
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for (auto* parent = wd->parent; parent; parent = parent->parent)
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{
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overlap(rectangle{ parent->pos_root, parent->dimension }, visual, visual);
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}
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return true;
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}
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//read_overlaps
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// reads the overlaps that are overlapped a rectangular block
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bool window_layout::read_overlaps(core_window_t* wd, const nana::rectangle& vis_rect, std::vector<wd_rectangle>& blocks)
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{
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wd_rectangle block;
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while (wd->parent)
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{
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auto & siblings = wd->parent->children;
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//It should be checked that whether the window is still a chlid of its parent.
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if (siblings.size())
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{
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auto i = &(siblings[0]);
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auto *end = i + siblings.size();
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i = std::find(i, end, wd);
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if (i != end)
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{
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//find the widget that next to wd.
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for (++i; i < end; ++i)
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{
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core_window_t* cover = *i;
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if ((category::flags::root != cover->other.category) && cover->visible && (nullptr == cover->effect.bground))
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{
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if (overlap(vis_rect, rectangle{ cover->pos_root, cover->dimension }, block.r))
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{
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block.window = cover;
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blocks.push_back(block);
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}
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}
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}
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}
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}
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wd = wd->parent;
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}
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return (!blocks.empty());
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}
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bool window_layout::enable_effects_bground(core_window_t * wd, bool enabled)
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{
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if (category::flags::widget != wd->other.category)
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return false;
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if (false == enabled)
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{
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delete wd->effect.bground;
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wd->effect.bground = nullptr;
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wd->effect.bground_fade_rate = 0;
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}
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//Find the window whether it is registered for the bground effects
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auto i = std::find(data_sect.effects_bground_windows.begin(), data_sect.effects_bground_windows.end(), wd);
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if (i != data_sect.effects_bground_windows.end())
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{
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//If it has already registered, do nothing.
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if (enabled)
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return false;
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//Disable the effect.
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data_sect.effects_bground_windows.erase(i);
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wd->other.glass_buffer.release();
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return true;
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}
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//No such effect has registered.
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if (false == enabled)
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return false;
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//Enable the effect.
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data_sect.effects_bground_windows.push_back(wd);
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wd->other.glass_buffer.make(wd->dimension);
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make_bground(wd);
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return true;
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}
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//make_bground
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// update the glass buffer of a glass window.
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void window_layout::make_bground(core_window_t* const wd)
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{
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nana::point rpos{ wd->pos_root };
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auto & glass_buffer = wd->other.glass_buffer;
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if (category::flags::lite_widget == wd->parent->other.category)
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{
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std::vector<core_window_t*> layers;
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core_window_t * beg = wd->parent;
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while (beg && (category::flags::lite_widget == beg->other.category))
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{
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layers.push_back(beg);
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beg = beg->parent;
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}
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glass_buffer.bitblt(::nana::rectangle{ wd->dimension }, beg->drawer.graphics, wd->pos_root - beg->pos_root);
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nana::rectangle r(wd->pos_owner, wd->dimension);
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for (auto i = layers.rbegin(), layers_rend = layers.rend(); i != layers_rend; ++i)
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{
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core_window_t * pre = *i;
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if (false == pre->visible)
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continue;
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core_window_t * term = ((i + 1 != layers_rend) ? *(i + 1) : wd);
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r.x = wd->pos_root.x - pre->pos_root.x;
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r.y = wd->pos_root.y - pre->pos_root.y;
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for (auto child : pre->children)
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{
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if (child->index >= term->index)
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break;
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nana::rectangle ovlp;
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if (child->visible && overlap(r, rectangle(child->pos_owner, child->dimension), ovlp))
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{
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if (category::flags::lite_widget != child->other.category)
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glass_buffer.bitblt(nana::rectangle(ovlp.x - pre->pos_owner.x, ovlp.y - pre->pos_owner.y, ovlp.width, ovlp.height), child->drawer.graphics, nana::point(ovlp.x - child->pos_owner.x, ovlp.y - child->pos_owner.y));
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ovlp.x += pre->pos_root.x;
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ovlp.y += pre->pos_root.y;
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_m_paste_children(child, false, false, ovlp, glass_buffer, rpos);
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}
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}
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}
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}
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else
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glass_buffer.bitblt(::nana::rectangle{ wd->dimension }, wd->parent->drawer.graphics, wd->pos_owner);
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const rectangle r_of_wd{ wd->pos_owner, wd->dimension };
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for (auto child : wd->parent->children)
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{
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if (child->index >= wd->index)
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break;
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nana::rectangle ovlp;
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if (child->visible && overlap(r_of_wd, rectangle{ child->pos_owner, child->dimension }, ovlp))
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{
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if (category::flags::lite_widget != child->other.category)
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glass_buffer.bitblt(nana::rectangle{ ovlp.x - wd->pos_owner.x, ovlp.y - wd->pos_owner.y, ovlp.width, ovlp.height }, child->drawer.graphics, nana::point(ovlp.x - child->pos_owner.x, ovlp.y - child->pos_owner.y));
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ovlp.x += wd->pos_root.x;
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ovlp.y += wd->pos_root.y;
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_m_paste_children(child, false, false, ovlp, glass_buffer, rpos);
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}
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}
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if (wd->effect.bground)
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wd->effect.bground->take_effect(reinterpret_cast<window>(wd), glass_buffer);
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}
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//_m_paste_children
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//@brief:paste children window to the root graphics directly. just paste the visual rectangle
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void window_layout::_m_paste_children(core_window_t* wd, bool is_child_refreshed, bool have_refreshed, const nana::rectangle& parent_rect, nana::paint::graphics& graph, const nana::point& graph_rpos)
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{
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nana::rectangle rect;
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for (auto child : wd->children)
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{
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//it will not past children if no drawer and visible is false.
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if ((false == child->visible) || ((category::flags::lite_widget != child->other.category) && child->drawer.graphics.empty()))
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continue;
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if (category::flags::root == child->other.category)
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{
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paint(child, is_child_refreshed, is_child_refreshed);
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continue;
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}
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if (nullptr == child->effect.bground)
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{
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if (overlap(nana::rectangle{ child->pos_root, child->dimension }, parent_rect, rect))
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{
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bool have_child_refreshed = false;
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if (category::flags::lite_widget != child->other.category)
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{
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if (is_child_refreshed && (false == child->flags.refreshing))
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{
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have_child_refreshed = true;
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child->flags.refreshing = true;
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child->drawer.refresh();
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child->flags.refreshing = false;
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}
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graph.bitblt(nana::rectangle(rect.x - graph_rpos.x, rect.y - graph_rpos.y, rect.width, rect.height),
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child->drawer.graphics, nana::point(rect.x - child->pos_root.x, rect.y - child->pos_root.y));
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}
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_m_paste_children(child, is_child_refreshed, have_child_refreshed, rect, graph, graph_rpos);
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}
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}
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else
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{
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//If have_refreshed, the glass should be notified.
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_m_paint_glass_window(child, false, is_child_refreshed, have_refreshed, false);
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}
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}
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}
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void window_layout::_m_paint_glass_window(core_window_t* wd, bool is_redraw, bool is_child_refreshed, bool called_by_notify, bool notify_other)
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{
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//A window which has an empty graphics(and lite-widget) does not notify
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//glass windows for updating their background.
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if ((wd->flags.refreshing && is_redraw) || wd->drawer.graphics.empty())
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return;
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nana::rectangle vr;
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if (read_visual_rectangle(wd, vr))
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{
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if (is_redraw || called_by_notify)
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{
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//The background is made by more than calling by notification(such as redraw of parent,
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//redraw of siblings which are covered by wd), sometimes it should be remade when an attribute
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//of the wd is changed(such as its background color is changed).
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if (called_by_notify || wd->flags.make_bground_declared)
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{
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make_bground(wd);
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wd->flags.make_bground_declared = false;
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}
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wd->flags.refreshing = true;
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wd->drawer.refresh();
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wd->flags.refreshing = false;
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}
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auto & root_graph = *(wd->root_graph);
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//Map root
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root_graph.bitblt(vr, wd->drawer.graphics, nana::point(vr.x - wd->pos_root.x, vr.y - wd->pos_root.y));
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_m_paste_children(wd, is_child_refreshed, (is_redraw || called_by_notify), vr, root_graph, nana::point());
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if (wd->parent)
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{
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std::vector<wd_rectangle> blocks;
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read_overlaps(wd, vr, blocks);
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for (auto & n : blocks)
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{
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root_graph.bitblt(n.r, (n.window->drawer.graphics), nana::point(n.r.x - n.window->pos_root.x, n.r.y - n.window->pos_root.y));
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}
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}
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if (notify_other)
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_m_notify_glasses(wd, vr);
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}
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}
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//_m_notify_glasses
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//@brief: Notify the glass windows that are overlapped with the specified vis_rect
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void window_layout::_m_notify_glasses(core_window_t* const sigwd, const nana::rectangle& /*r_visual*/)
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{
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typedef category::flags cat_flags;
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nana::rectangle r_of_sigwd(sigwd->pos_root, sigwd->dimension);
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for (auto wd : data_sect.effects_bground_windows)
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{
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if (wd == sigwd || !wd->displayed() ||
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(false == overlapped(nana::rectangle{ wd->pos_root, wd->dimension }, r_of_sigwd)))
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continue;
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if (sigwd->parent == wd->parent)
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{
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if (sigwd->index >= wd->index)
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continue;
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}
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else if (sigwd != wd->parent)
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{
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if (wd->parent && (cat_flags::lite_widget == wd->parent->other.category))
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{
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//Test if sigwd is an ancestor of the glass window, and there are lite widgets
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//between sigwd and glass window.
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auto ancestor = wd->parent->parent;
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while (ancestor && (ancestor != sigwd) && (cat_flags::lite_widget == ancestor->other.category))
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ancestor = ancestor->parent;
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if ((ancestor != sigwd) || (cat_flags::lite_widget == ancestor->other.category))
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continue;
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}
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else
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{
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//test if sigwnd is a parent of glass window x, or a slibing of the glass window, or a child of the slibing of the glass window.
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core_window_t *p = wd->parent, *signode = sigwd;
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while (signode->parent && (signode->parent != p))
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signode = signode->parent;
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if ((!signode->parent) || (signode->index >= wd->index))
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continue;
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}
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}
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else
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continue;
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_m_paint_glass_window(wd, true, false, true, true);
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}
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}
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//end class window_layout
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window_layout::data_section window_layout::data_sect;
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}//end namespace detail
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}//end namespace nana
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