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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
commit | cca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch) | |
tree | 146f39ded1c938019e1ed42d30923c2ac9e86789 /src/display/control/canvas-item-grid.cpp | |
parent | Initial commit. (diff) | |
download | inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.tar.xz inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.zip |
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/display/control/canvas-item-grid.cpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/display/control/canvas-item-grid.cpp b/src/display/control/canvas-item-grid.cpp new file mode 100644 index 0000000..2965b86 --- /dev/null +++ b/src/display/control/canvas-item-grid.cpp @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** + * A class to represent a grid. All the magic happens elsewhere. + */ + +/* + * Author: + * Tavmjong Bah + * + * Copyright (C) 2020 Tavmjong Bah + * + * Rewrite of GridCanvasItem. + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "canvas-item-grid.h" + +#include "canvas-grid.h" + +#include "color.h" // SP_RGBA_x_F + +#include "ui/widget/canvas.h" + +namespace Inkscape { + +/** + * Create an null control grid. + */ +CanvasItemGrid::CanvasItemGrid(CanvasItemGroup *group, CanvasGrid *grid) + : CanvasItem(group) + , _grid(grid) +{ + _name = "CanvasItemGrid:"; + _name += grid->getName(grid->getGridType()); + _pickable = false; // For now, nobody gets events from this class! + _bounds = Geom::Rect(-Geom::infinity(), -Geom::infinity(), Geom::infinity(), Geom::infinity()); + + request_update(); // Update affine +} + +/** + * Destructor: must remove ourself from the CanvasGrid's vector of CanvasItemGrids. + */ +CanvasItemGrid::~CanvasItemGrid() +{ + if (_grid) { + _grid->removeCanvasItem(this); + } +} + +/** + * Returns distance between point in canvas units and nearest point on grid. + */ +double CanvasItemGrid::closest_distance_to(Geom::Point const &p) +{ + double d = Geom::infinity(); + std::cerr << "CanvasItemGrid::closest_distance_to: Not implemented!" << std::endl; + return d; +} + +/** + * Returns true if point p (in canvas units) is within tolerance (canvas units) distance of grid. + */ +bool CanvasItemGrid::contains(Geom::Point const &p, double tolerance) +{ + return false; // We're not pickable! +} + +/** + * Update and redraw control grid. + */ +void CanvasItemGrid::update(Geom::Affine const &affine) +{ + if (_affine == affine && !_need_update) { + // Nothing to do. + return; + } + + _affine = affine; + _grid->Update(affine, 0); // TODO: Remove flag (not used). + _need_update = false; + + // Queue redraw of grid area + request_redraw(); +} + +/** + * Render grid to screen via Cairo. + */ +void CanvasItemGrid::render(Inkscape::CanvasItemBuffer *buf) +{ + if (!buf) { + std::cerr << "CanvasItemGrid::Render: No buffer!" << std::endl; + return; + } + + if (!_visible) { + // Hidden + return; + } + + if (!_grid->isVisible()) { + // Hidden: Grid code doesn't set CanvasItem::visible! + return; + } + + _grid->Render(buf); +} + +} // 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 : |