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Diffstat (limited to '')
| -rw-r--r-- | vcl/unx/gtk4/surfacecellrenderer.cxx | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/vcl/unx/gtk4/surfacecellrenderer.cxx b/vcl/unx/gtk4/surfacecellrenderer.cxx new file mode 100644 index 000000000..2ae0782b9 --- /dev/null +++ b/vcl/unx/gtk4/surfacecellrenderer.cxx @@ -0,0 +1,241 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#include <vcl/svapp.hxx> +#include "surfacecellrenderer.hxx" +#include <cairo/cairo-gobject.h> + +namespace +{ +struct _SurfaceCellRendererClass : public GtkCellRendererClass +{ +}; + +enum +{ + PROP_SURFACE = 10000, +}; +} + +G_DEFINE_TYPE(SurfaceCellRenderer, surface_cell_renderer, GTK_TYPE_CELL_RENDERER) + +static void surface_cell_renderer_init(SurfaceCellRenderer* self) +{ + self->surface = nullptr; + // prevent loplugin:unreffun firing on macro generated function + (void)surface_cell_renderer_get_instance_private(self); +} + +static void surface_cell_renderer_get_property(GObject* object, guint param_id, GValue* value, + GParamSpec* pspec) +{ + SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(object); + + switch (param_id) + { + case PROP_SURFACE: + g_value_set_boxed(value, cellsurface->surface); + break; + default: + G_OBJECT_CLASS(surface_cell_renderer_parent_class) + ->get_property(object, param_id, value, pspec); + break; + } +} + +static void surface_cell_renderer_set_property(GObject* object, guint param_id, const GValue* value, + GParamSpec* pspec) +{ + SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(object); + + switch (param_id) + { + case PROP_SURFACE: + if (cellsurface->surface) + cairo_surface_destroy(cellsurface->surface); + cellsurface->surface = static_cast<cairo_surface_t*>(g_value_get_boxed(value)); + if (cellsurface->surface) + cairo_surface_reference(cellsurface->surface); + break; + default: + G_OBJECT_CLASS(surface_cell_renderer_parent_class) + ->set_property(object, param_id, value, pspec); + break; + } +} + +static bool surface_cell_renderer_get_preferred_size(GtkCellRenderer* cell, + GtkOrientation orientation, gint* minimum_size, + gint* natural_size); + +static void surface_cell_renderer_snapshot(GtkCellRenderer* cell, GtkSnapshot* snapshot, + GtkWidget* widget, const GdkRectangle* background_area, + const GdkRectangle* cell_area, + GtkCellRendererState flags); + +static void surface_cell_renderer_render(GtkCellRenderer* cell, cairo_t* cr, GtkWidget* widget, + const GdkRectangle* background_area, + const GdkRectangle* cell_area, GtkCellRendererState flags); + +static void surface_cell_renderer_finalize(GObject* object) +{ + SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(object); + + if (cellsurface->surface) + cairo_surface_destroy(cellsurface->surface); + + G_OBJECT_CLASS(surface_cell_renderer_parent_class)->finalize(object); +} + +static void surface_cell_renderer_get_preferred_width(GtkCellRenderer* cell, GtkWidget* widget, + gint* minimum_size, gint* natural_size) +{ + if (!surface_cell_renderer_get_preferred_size(cell, GTK_ORIENTATION_HORIZONTAL, minimum_size, + natural_size)) + { + // fallback to parent if we're empty + GTK_CELL_RENDERER_CLASS(surface_cell_renderer_parent_class) + ->get_preferred_width(cell, widget, minimum_size, natural_size); + } +} + +static void surface_cell_renderer_get_preferred_height(GtkCellRenderer* cell, GtkWidget* widget, + gint* minimum_size, gint* natural_size) +{ + if (!surface_cell_renderer_get_preferred_size(cell, GTK_ORIENTATION_VERTICAL, minimum_size, + natural_size)) + { + // fallback to parent if we're empty + GTK_CELL_RENDERER_CLASS(surface_cell_renderer_parent_class) + ->get_preferred_height(cell, widget, minimum_size, natural_size); + } +} + +static void surface_cell_renderer_get_preferred_height_for_width(GtkCellRenderer* cell, + GtkWidget* widget, gint /*width*/, + gint* minimum_height, + gint* natural_height) +{ + gtk_cell_renderer_get_preferred_height(cell, widget, minimum_height, natural_height); +} + +static void surface_cell_renderer_get_preferred_width_for_height(GtkCellRenderer* cell, + GtkWidget* widget, gint /*height*/, + gint* minimum_width, + gint* natural_width) +{ + gtk_cell_renderer_get_preferred_width(cell, widget, minimum_width, natural_width); +} + +void surface_cell_renderer_class_init(SurfaceCellRendererClass* klass) +{ + GtkCellRendererClass* cell_class = GTK_CELL_RENDERER_CLASS(klass); + GObjectClass* object_class = G_OBJECT_CLASS(klass); + + /* Hook up functions to set and get our custom cell renderer properties */ + object_class->get_property = surface_cell_renderer_get_property; + object_class->set_property = surface_cell_renderer_set_property; + + surface_cell_renderer_parent_class = g_type_class_peek_parent(klass); + object_class->finalize = surface_cell_renderer_finalize; + + cell_class->get_preferred_width = surface_cell_renderer_get_preferred_width; + cell_class->get_preferred_height = surface_cell_renderer_get_preferred_height; + cell_class->get_preferred_width_for_height + = surface_cell_renderer_get_preferred_width_for_height; + cell_class->get_preferred_height_for_width + = surface_cell_renderer_get_preferred_height_for_width; + + cell_class->snapshot = surface_cell_renderer_snapshot; + + g_object_class_install_property( + object_class, PROP_SURFACE, + g_param_spec_boxed("surface", "Surface", "The cairo surface to render", + CAIRO_GOBJECT_TYPE_SURFACE, G_PARAM_READWRITE)); +} + +GtkCellRenderer* surface_cell_renderer_new() +{ + return GTK_CELL_RENDERER(g_object_new(SURFACE_TYPE_CELL_RENDERER, nullptr)); +} + +static void get_surface_size(cairo_surface_t* pSurface, int& rWidth, int& rHeight) +{ + double x1, x2, y1, y2; + cairo_t* cr = cairo_create(pSurface); + cairo_clip_extents(cr, &x1, &y1, &x2, &y2); + cairo_destroy(cr); + + rWidth = x2 - x1; + rHeight = y2 - y1; +} + +bool surface_cell_renderer_get_preferred_size(GtkCellRenderer* cell, GtkOrientation orientation, + gint* minimum_size, gint* natural_size) +{ + SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(cell); + + int nWidth = 0; + int nHeight = 0; + + if (cellsurface->surface) + get_surface_size(cellsurface->surface, nWidth, nHeight); + + if (orientation == GTK_ORIENTATION_HORIZONTAL) + { + if (minimum_size) + *minimum_size = nWidth; + + if (natural_size) + *natural_size = nWidth; + } + else + { + if (minimum_size) + *minimum_size = nHeight; + + if (natural_size) + *natural_size = nHeight; + } + + return true; +} + +void surface_cell_renderer_render(GtkCellRenderer* cell, cairo_t* cr, GtkWidget* /*widget*/, + const GdkRectangle* /*background_area*/, + const GdkRectangle* cell_area, GtkCellRendererState /*flags*/) +{ + SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(cell); + if (!cellsurface->surface) + return; + + int nWidth, nHeight; + get_surface_size(cellsurface->surface, nWidth, nHeight); + int nXOffset = (cell_area->width - nWidth) / 2; + int nYOffset = (cell_area->height - nHeight) / 2; + + cairo_set_source_surface(cr, cellsurface->surface, cell_area->x + nXOffset, + cell_area->y + nYOffset); + cairo_paint(cr); +} + +static void surface_cell_renderer_snapshot(GtkCellRenderer* cell, GtkSnapshot* snapshot, + GtkWidget* widget, const GdkRectangle* background_area, + const GdkRectangle* cell_area, + GtkCellRendererState flags) +{ + graphene_rect_t rect = GRAPHENE_RECT_INIT( + static_cast<float>(cell_area->x), static_cast<float>(cell_area->y), + static_cast<float>(cell_area->width), static_cast<float>(cell_area->height)); + cairo_t* cr = gtk_snapshot_append_cairo(GTK_SNAPSHOT(snapshot), &rect); + surface_cell_renderer_render(cell, cr, widget, background_area, cell_area, flags); + cairo_destroy(cr); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |