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Diffstat (limited to '')
| -rw-r--r-- | src/display/control/canvas-page.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/display/control/canvas-page.cpp b/src/display/control/canvas-page.cpp new file mode 100644 index 0000000..d6b363f --- /dev/null +++ b/src/display/control/canvas-page.cpp @@ -0,0 +1,176 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Inkscape pages implementation + * + * Authors: + * Martin Owens <doctormo@geek-2.com> + * + * Copyright (C) 2021 Martin Owens + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "canvas-page.h" +#include "canvas-item-rect.h" +#include "canvas-item-text.h" + +namespace Inkscape { + +CanvasPage::~CanvasPage() +{ + for (auto item : canvas_items) { + delete item; + } + canvas_items.clear(); +} + +/** + * Add the page canvas to the given canvas item groups (canvas view is implicit) + */ +void CanvasPage::add(Geom::Rect size, CanvasItemGroup *background_group, CanvasItemGroup *border_group) +{ + // Foreground 'border' + if (auto item = new CanvasItemRect(border_group, size)) { + item->set_name("foreground"); + canvas_items.push_back(item); + } + + // Background rectangle 'fill' + if (auto item = new CanvasItemRect(background_group, size)) { + item->set_name("background"); + item->set_dashed(false); + item->set_inverted(false); + item->set_stroke(0x00000000); + canvas_items.push_back(item); + } + + if (auto label = new CanvasItemText(border_group, Geom::Point(0, 0), "{Page Label}")) { + label->set_fontsize(10.0); + label->set_fill(0xffffffff); + label->set_background(0x00000099); + label->set_bg_radius(0.2); + label->set_anchor(Geom::Point(0.0, 1.0)); + label->set_fixed_line(true); + canvas_items.push_back(label); + } +} +/** + * Hide the page in the given canvas widget. + */ +void CanvasPage::remove(UI::Widget::Canvas *canvas) +{ + g_assert(canvas != nullptr); + for (auto it = canvas_items.begin(); it != canvas_items.end();) { + if (canvas == (*it)->get_canvas()) { + delete (*it); + it = canvas_items.erase(it); + } else { + ++it; + } + } +} + +void CanvasPage::show() +{ + for (auto item : canvas_items) { + item->show(); + } +} + +void CanvasPage::hide() +{ + for (auto item : canvas_items) { + item->hide(); + } +} + +/** + * Update the visual representation of a page on screen. + * + * @param size - The size of the page in desktop units + * @param txt - An optional label for the page + * @param outline - Disable normal rendering and show as an outline. + */ +void CanvasPage::update(Geom::Rect size, const char *txt, bool outline) +{ + // Put these in the preferences? + bool border_on_top = _border_on_top; + guint32 shadow_color = _border_color; // there's no separate shadow color in the UI, border color is used + guint32 select_color = 0xff0000cc; + guint32 border_color = _border_color; + + // This is used when showing the viewport as *not a page* it's mostly + // never used as the first page is normally the viewport too. + if (outline) { + border_on_top = false; + _shadow_size = 0; + border_color = select_color; + } + + for (auto item : canvas_items) { + if (auto rect = dynamic_cast<CanvasItemRect *>(item)) { + rect->set_rect(size); + + bool is_foreground = (rect->get_name() == "foreground"); + // This will put the border on the background OR foreground layer as needed. + if (is_foreground == border_on_top) { + rect->show(); + rect->set_shadow(shadow_color, _shadow_size); + rect->set_stroke(is_selected ? select_color : border_color); + } else { + rect->hide(); + rect->set_shadow(0x0, 0); + rect->set_stroke(0x0); + } + // This undoes the hide for the background rect, but that's ok + if (!is_foreground) { + rect->show(); + if (_checkerboard) { + rect->set_background_checkerboard(_background_color, true); + } + else { + // TODO: This ignores the requested transparency to paint the background. + // there is disagreement between developers about this feature. + rect->set_background(_background_color | 0xff); + } + } + } + if (auto label = dynamic_cast<CanvasItemText *>(item)) { + if (txt) { + auto corner = size.corner(0); + label->set_coord(corner); + label->set_text(txt); + label->show(); + } else { + label->set_text(""); + label->hide(); + } + } + } +} + +bool CanvasPage::setAttributes(bool on_top, guint32 border, guint32 bg, int shadow, bool checkerboard) +{ + if (on_top != _border_on_top || border != _border_color || bg != _background_color || shadow != _shadow_size || checkerboard != _checkerboard) { + this->_border_on_top = on_top; + this->_border_color = border; + this->_background_color = bg; + _shadow_size = shadow; + _checkerboard = checkerboard; + return true; + } + return false; +} + +}; + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 : |