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Diffstat (limited to 'src/display/control/canvas-page.cpp')
| -rw-r--r-- | src/display/control/canvas-page.cpp | 282 |
1 files changed, 282 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..5fa337d --- /dev/null +++ b/src/display/control/canvas-page.cpp @@ -0,0 +1,282 @@ +// 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" +#include "color.h" + +namespace Inkscape { + +CanvasPage::CanvasPage() = default; + +CanvasPage::~CanvasPage() = default; + +/** + * 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"); + item->set_is_page(true); + canvas_items.emplace_back(item); + } + + // Background rectangle 'fill' + if (auto item = new CanvasItemRect(background_group, size)) { + item->set_name("background"); + item->set_is_page(true); + item->set_dashed(false); + item->set_inverted(false); + item->set_stroke(0x00000000); + canvas_items.emplace_back(item); + } + + if (auto item = new CanvasItemRect(border_group, size)) { + item->set_name("margin"); + item->set_dashed(false); + item->set_inverted(false); + item->set_stroke(_margin_color); + canvas_items.emplace_back(item); + } + + if (auto item = new CanvasItemRect(border_group, size)) { + item->set_name("bleed"); + item->set_dashed(false); + item->set_inverted(false); + item->set_stroke(_bleed_color); + canvas_items.emplace_back(item); + } + + if (auto label = new CanvasItemText(border_group, Geom::Point(0, 0), "{Page Label}")) { + label->set_fixed_line(false); + canvas_items.emplace_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()) { + 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(); + } +} + +void CanvasPage::set_guides_visible(bool show) { + for (auto& item: canvas_items) { + if (item->get_name() == "margin" || item->get_name() == "bleed") { + item->set_visible(show); + } + } +} + +/** + * 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, Geom::OptRect margin, Geom::OptRect bleed, 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 = 0x000000cc; + guint32 border_color = _border_color; + guint32 margin_color = _margin_color; + guint32 bleed_color = _bleed_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.get())) { + if (rect->get_name() == "margin") { + rect->set_stroke(margin_color); + bool vis = margin && *margin != size; + rect->set_visible(vis); + if (vis) { + rect->set_rect(*margin); + } + continue; + } + if (rect->get_name() == "bleed") { + rect->set_stroke(bleed_color); + bool vis = bleed && *bleed != size; + rect->set_visible(vis); + if (vis) { + rect->set_rect(*bleed); + } + continue; + } + + 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_stroke(is_selected ? select_color : border_color); + } else { + rect->hide(); + rect->set_stroke(0x0); + } + // This undoes the hide for the background rect, and additionally gives it a fill and shadow. + if (!is_foreground) { + rect->show(); +/* + if (_checkerboard) { + // draw checkerboard pattern, ignore alpha (background color doesn't support it) + rect->set_background_checkerboard(_background_color, false); + } + else { + // Background color does not support transparency; draw opaque pages + rect->set_background(_background_color | 0xff); + } +*/ + rect->set_fill(_background_color); + rect->set_shadow(shadow_color, _shadow_size); + } else { + rect->set_fill(0x0); + rect->set_shadow(0x0, 0); + } + } else if (auto label = dynamic_cast<CanvasItemText *>(item.get())) { + _updateTextItem(label, size, txt ? txt : ""); + } + } +} + +/** + * Update the page's textual label. + */ +void CanvasPage::_updateTextItem(CanvasItemText *label, Geom::Rect page, std::string txt) +{ + // Default style for the label + int fontsize = 10.0; + uint32_t foreground = 0xffffffff; + uint32_t background = 0x00000099; + uint32_t selected = 0x0e5bf199; + Geom::Point anchor(0.0, 1.0); + Geom::Point coord = page.corner(0); + double radius = 0.2; + + // Change the colors for whiter/lighter backgrounds + unsigned char luminance = SP_RGBA32_LUMINANCE(_canvas_color); + if (luminance < 0x88) { + foreground = 0x000000ff; + background = 0xffffff99; + selected = 0x50afe7ff; + } + + if (_label_style == "below") { + radius = 1.0; + fontsize = 14.0; + anchor = Geom::Point(0.5, -0.2); + coord = Geom::Point(page.midpoint()[Geom::X], page.bottom()); + + if (!txt.empty()) { + std::string bullet = is_selected ? " \u2022 " : " "; + txt = bullet + txt + bullet; + } + } + + label->set_fontsize(fontsize); + label->set_fill(foreground); + label->set_background(is_selected ? selected : background); + label->set_bg_radius(radius); + label->set_anchor(anchor); + label->set_coord(coord); + label->set_visible(!txt.empty()); + label->set_text(std::move(txt)); + label->set_border(4.0); +} + +bool CanvasPage::setOnTop(bool on_top) +{ + if (on_top != _border_on_top) { + _border_on_top = on_top; + return true; + } + return false; +} + +bool CanvasPage::setShadow(int shadow) +{ + if (_shadow_size != shadow) { + _shadow_size = shadow; + return true; + } + return false; +} + +bool CanvasPage::setPageColor(uint32_t border, uint32_t bg, uint32_t canvas, uint32_t margin, uint32_t bleed) +{ + if (border != _border_color || bg != _background_color || canvas != _canvas_color) { + _border_color = border; + _background_color = bg; + _canvas_color = canvas; + _margin_color = margin; + _bleed_color = bleed; + return true; + } + return false; +} + +bool CanvasPage::setLabelStyle(const std::string &style) +{ + if (style != _label_style) { + _label_style = style; + return true; + } + return false; +} + +} // namespace Inkscape + +/* + 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 : |