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-rw-r--r--src/display/control/canvas-page.cpp176
1 files changed, 176 insertions, 0 deletions
diff --git a/src/display/control/canvas-page.cpp b/src/display/control/canvas-page.cpp
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+// 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 :