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author | Timothy Pearson <[email protected]> | 2012-09-14 10:10:15 -0500 |
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committer | Timothy Pearson <[email protected]> | 2012-09-14 10:10:15 -0500 |
commit | 143c156ed8a46947ba6ddb912f2e7f2965f1908c (patch) | |
tree | c383e4af523e9294fb4c1f6b0fc8b2f2e6f50b29 /tdegtk/gtkroundedbox.c | |
download | gtk3-tqt-engine-143c156ed8a46947ba6ddb912f2e7f2965f1908c.tar.gz gtk3-tqt-engine-143c156ed8a46947ba6ddb912f2e7f2965f1908c.zip |
Initial import of renamed Unico engine, ready for hacking!
Diffstat (limited to 'tdegtk/gtkroundedbox.c')
-rw-r--r-- | tdegtk/gtkroundedbox.c | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/tdegtk/gtkroundedbox.c b/tdegtk/gtkroundedbox.c new file mode 100644 index 0000000..7c5740f --- /dev/null +++ b/tdegtk/gtkroundedbox.c @@ -0,0 +1,421 @@ +/* GTK - The GIMP Toolkit + * Copyright (C) 2011 Benjamin Otte <[email protected]> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#include <string.h> +#include <cairo.h> + +#include "gtkroundedboxprivate.h" + +/** + * _gtk_rounded_box_init_rect: + * @box: box to initialize + * @x: x coordinate of box + * @y: y coordinate of box + * @width: width of box + * @height: height of box + * + * Initializes the given @box to represent the given rectangle. + **/ +void +_gtk_rounded_box_init_rect (GtkRoundedBox *box, + gdouble x, + gdouble y, + gdouble width, + gdouble height) +{ + box->box.x = x; + box->box.y = y; + box->box.width = width; + box->box.height = height; + memset (&box->border_radius, 0, sizeof (GtkCssBorderRadius)); +} + +/* clamp border radius, following CSS specs */ +static void +gtk_rounded_box_clamp_border_radius (GtkRoundedBox *box) +{ + gdouble factor = 1.0; + + /* left */ + if (box->border_radius.top_left.vertical + box->border_radius.bottom_left.vertical > 0 && + box->border_radius.top_left.vertical + box->border_radius.bottom_left.vertical > box->box.height) + factor = MIN (factor, box->box.height / (box->border_radius.top_left.vertical + + box->border_radius.bottom_left.vertical)); + + /* top */ + if (box->border_radius.top_left.horizontal + box->border_radius.top_right.horizontal > 0 && + box->border_radius.top_left.horizontal + box->border_radius.top_right.horizontal > box->box.width) + factor = MIN (factor, box->box.width / (box->border_radius.top_left.horizontal + + box->border_radius.top_right.horizontal)); + + /* right */ + if (box->border_radius.top_right.vertical + box->border_radius.bottom_right.horizontal > 0 && + box->border_radius.top_right.vertical + box->border_radius.bottom_right.horizontal > box->box.height) + factor = MIN (factor, box->box.height / (box->border_radius.top_right.vertical + + box->border_radius.bottom_right.horizontal)); + + /* bottom */ + if (box->border_radius.bottom_right.horizontal + box->border_radius.bottom_left.horizontal > 0 && + box->border_radius.bottom_right.horizontal + box->border_radius.bottom_left.horizontal > box->box.width) + factor = MIN (factor, box->box.width / (box->border_radius.bottom_right.horizontal + + box->border_radius.bottom_left.horizontal)); + + /* scale border radius */ + box->border_radius.top_left.horizontal *= factor; + box->border_radius.top_left.vertical *= factor; + box->border_radius.top_right.horizontal *= factor; + box->border_radius.top_right.vertical *= factor; + box->border_radius.bottom_right.horizontal *= factor; + box->border_radius.bottom_right.vertical *= factor; + box->border_radius.bottom_left.horizontal *= factor; + box->border_radius.bottom_left.vertical *= factor; +} + +void +_gtk_rounded_box_apply_border_radius (GtkRoundedBox *box, + GtkThemingEngine *engine, + GtkStateFlags state, + GtkJunctionSides junction) +{ + GtkCssBorderCornerRadius *top_left_radius, *top_right_radius; + GtkCssBorderCornerRadius *bottom_left_radius, *bottom_right_radius; + + gtk_theming_engine_get (engine, state, + /* Can't use border-radius as it's an int for + * backwards compat */ + "border-top-left-radius", &top_left_radius, + "border-top-right-radius", &top_right_radius, + "border-bottom-right-radius", &bottom_right_radius, + "border-bottom-left-radius", &bottom_left_radius, + NULL); + + if (top_left_radius && (junction & GTK_JUNCTION_CORNER_TOPLEFT) == 0) + box->border_radius.top_left = *top_left_radius; + if (top_right_radius && (junction & GTK_JUNCTION_CORNER_TOPRIGHT) == 0) + box->border_radius.top_right = *top_right_radius; + if (bottom_right_radius && (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT) == 0) + box->border_radius.bottom_right = *bottom_right_radius; + if (bottom_left_radius && (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT) == 0) + box->border_radius.bottom_left = *bottom_left_radius; + + gtk_rounded_box_clamp_border_radius (box); + + g_free (top_left_radius); + g_free (top_right_radius); + g_free (bottom_right_radius); + g_free (bottom_left_radius); +} + +static void +gtk_css_border_radius_grow (GtkCssBorderCornerRadius *corner, + gdouble horizontal, + gdouble vertical) +{ + corner->horizontal += horizontal; + corner->vertical += vertical; + + if (corner->horizontal <= 0 || corner->vertical <= 0) + { + corner->horizontal = 0; + corner->vertical = 0; + } +} + +void +_gtk_rounded_box_grow (GtkRoundedBox *box, + gdouble top, + gdouble right, + gdouble bottom, + gdouble left) +{ + if (box->box.width + left + right < 0) + { + box->box.x -= left * box->box.width / (left + right); + box->box.width = 0; + } + else + { + box->box.x -= left; + box->box.width += left + right; + } + + if (box->box.height + bottom + right < 0) + { + box->box.y -= top * box->box.height / (top + bottom); + box->box.height = 0; + } + else + { + box->box.y -= top; + box->box.height += top + bottom; + } + + gtk_css_border_radius_grow (&box->border_radius.top_left, left, top); + gtk_css_border_radius_grow (&box->border_radius.top_right, right, bottom); + gtk_css_border_radius_grow (&box->border_radius.bottom_right, right, top); + gtk_css_border_radius_grow (&box->border_radius.bottom_left, left, bottom); +} + +void +_gtk_rounded_box_shrink (GtkRoundedBox *box, + gdouble top, + gdouble right, + gdouble bottom, + gdouble left) +{ + _gtk_rounded_box_grow (box, -top, -right, -bottom, -left); +} + +void +_gtk_rounded_box_move (GtkRoundedBox *box, + gdouble dx, + gdouble dy) +{ + box->box.x += dx; + box->box.y += dy; +} + +static void +_cairo_ellipsis (cairo_t *cr, + gdouble xc, + gdouble yc, + gdouble xradius, + gdouble yradius, + gdouble angle1, + gdouble angle2) +{ + if (xradius <= 0.0 || yradius <= 0.0) + { + cairo_line_to (cr, xc, yc); + return; + } + + cairo_save (cr); + cairo_translate (cr, xc, yc); + cairo_scale (cr, xradius, yradius); + cairo_arc (cr, 0, 0, 1.0, angle1, angle2); + cairo_restore (cr); +} + +static void +_cairo_ellipsis_negative (cairo_t *cr, + gdouble xc, + gdouble yc, + gdouble xradius, + gdouble yradius, + gdouble angle1, + gdouble angle2) +{ + if (xradius <= 0.0 || yradius <= 0.0) + { + cairo_line_to (cr, xc, yc); + return; + } + + cairo_save (cr); + cairo_translate (cr, xc, yc); + cairo_scale (cr, xradius, yradius); + cairo_arc_negative (cr, 0, 0, 1.0, angle1, angle2); + cairo_restore (cr); +} + +void +_gtk_rounded_box_path (const GtkRoundedBox *box, + cairo_t *cr) +{ + cairo_new_sub_path (cr); + + _cairo_ellipsis (cr, + box->box.x + box->border_radius.top_left.horizontal, + box->box.y + box->border_radius.top_left.vertical, + box->border_radius.top_left.horizontal, + box->border_radius.top_left.vertical, + G_PI, 3 * G_PI / 2); + _cairo_ellipsis (cr, + box->box.x + box->box.width - box->border_radius.top_right.horizontal, + box->box.y + box->border_radius.top_right.vertical, + box->border_radius.top_right.horizontal, + box->border_radius.top_right.vertical, + - G_PI / 2, 0); + _cairo_ellipsis (cr, + box->box.x + box->box.width - box->border_radius.bottom_right.horizontal, + box->box.y + box->box.height - box->border_radius.bottom_right.vertical, + box->border_radius.bottom_right.horizontal, + box->border_radius.bottom_right.vertical, + 0, G_PI / 2); + _cairo_ellipsis (cr, + box->box.x + box->border_radius.bottom_left.horizontal, + box->box.y + box->box.height - box->border_radius.bottom_left.vertical, + box->border_radius.bottom_left.horizontal, + box->border_radius.bottom_left.vertical, + G_PI / 2, G_PI); +} + +void +_gtk_rounded_box_path_top (const GtkRoundedBox *outer, + const GtkRoundedBox *inner, + cairo_t *cr) +{ + cairo_new_sub_path (cr); + + _cairo_ellipsis (cr, + outer->box.x + outer->border_radius.top_left.horizontal, + outer->box.y + outer->border_radius.top_left.vertical, + outer->border_radius.top_left.horizontal, + outer->border_radius.top_left.vertical, + 5 * G_PI / 4, 3 * G_PI / 2); + _cairo_ellipsis (cr, + outer->box.x + outer->box.width - outer->border_radius.top_right.horizontal, + outer->box.y + outer->border_radius.top_right.vertical, + outer->border_radius.top_right.horizontal, + outer->border_radius.top_right.vertical, + - G_PI / 2, -G_PI / 4); + + _cairo_ellipsis_negative (cr, + inner->box.x + inner->box.width - inner->border_radius.top_right.horizontal, + inner->box.y + inner->border_radius.top_right.vertical, + inner->border_radius.top_right.horizontal, + inner->border_radius.top_right.vertical, + -G_PI / 4, - G_PI / 2); + _cairo_ellipsis_negative (cr, + inner->box.x + inner->border_radius.top_left.horizontal, + inner->box.y + inner->border_radius.top_left.vertical, + inner->border_radius.top_left.horizontal, + inner->border_radius.top_left.vertical, + 3 * G_PI / 2, 5 * G_PI / 4); + + cairo_close_path (cr); +} + +void +_gtk_rounded_box_path_right (const GtkRoundedBox *outer, + const GtkRoundedBox *inner, + cairo_t *cr) +{ + cairo_new_sub_path (cr); + + _cairo_ellipsis (cr, + outer->box.x + outer->box.width - outer->border_radius.top_right.horizontal, + outer->box.y + outer->border_radius.top_right.vertical, + outer->border_radius.top_right.horizontal, + outer->border_radius.top_right.vertical, + - G_PI / 4, 0); + _cairo_ellipsis (cr, + outer->box.x + outer->box.width - outer->border_radius.bottom_right.horizontal, + outer->box.y + outer->box.height - outer->border_radius.bottom_right.vertical, + outer->border_radius.bottom_right.horizontal, + outer->border_radius.bottom_right.vertical, + 0, G_PI / 4); + + _cairo_ellipsis_negative (cr, + inner->box.x + inner->box.width - inner->border_radius.bottom_right.horizontal, + inner->box.y + inner->box.height - inner->border_radius.bottom_right.vertical, + inner->border_radius.bottom_right.horizontal, + inner->border_radius.bottom_right.vertical, + G_PI / 4, 0); + _cairo_ellipsis_negative (cr, + inner->box.x + inner->box.width - inner->border_radius.top_right.horizontal, + inner->box.y + inner->border_radius.top_right.vertical, + inner->border_radius.top_right.horizontal, + inner->border_radius.top_right.vertical, + 0, - G_PI / 4); + + cairo_close_path (cr); +} + +void +_gtk_rounded_box_path_bottom (const GtkRoundedBox *outer, + const GtkRoundedBox *inner, + cairo_t *cr) +{ + cairo_new_sub_path (cr); + + _cairo_ellipsis (cr, + outer->box.x + outer->box.width - outer->border_radius.bottom_right.horizontal, + outer->box.y + outer->box.height - outer->border_radius.bottom_right.vertical, + outer->border_radius.bottom_right.horizontal, + outer->border_radius.bottom_right.vertical, + G_PI / 4, G_PI / 2); + _cairo_ellipsis (cr, + outer->box.x + outer->border_radius.bottom_left.horizontal, + outer->box.y + outer->box.height - outer->border_radius.bottom_left.vertical, + outer->border_radius.bottom_left.horizontal, + outer->border_radius.bottom_left.vertical, + G_PI / 2, 3 * G_PI / 4); + + _cairo_ellipsis_negative (cr, + inner->box.x + inner->border_radius.bottom_left.horizontal, + inner->box.y + inner->box.height - inner->border_radius.bottom_left.vertical, + inner->border_radius.bottom_left.horizontal, + inner->border_radius.bottom_left.vertical, + 3 * G_PI / 4, G_PI / 2); + _cairo_ellipsis_negative (cr, + inner->box.x + inner->box.width - inner->border_radius.bottom_right.horizontal, + inner->box.y + inner->box.height - inner->border_radius.bottom_right.vertical, + inner->border_radius.bottom_right.horizontal, + inner->border_radius.bottom_right.vertical, + G_PI / 2, G_PI / 4); + + cairo_close_path (cr); +} + +void +_gtk_rounded_box_path_left (const GtkRoundedBox *outer, + const GtkRoundedBox *inner, + cairo_t *cr) +{ + cairo_new_sub_path (cr); + + _cairo_ellipsis (cr, + outer->box.x + outer->border_radius.bottom_left.horizontal, + outer->box.y + outer->box.height - outer->border_radius.bottom_left.vertical, + outer->border_radius.bottom_left.horizontal, + outer->border_radius.bottom_left.vertical, + 3 * G_PI / 4, G_PI); + _cairo_ellipsis (cr, + outer->box.x + outer->border_radius.top_left.horizontal, + outer->box.y + outer->border_radius.top_left.vertical, + outer->border_radius.top_left.horizontal, + outer->border_radius.top_left.vertical, + G_PI, 5 * G_PI / 4); + + _cairo_ellipsis_negative (cr, + inner->box.x + inner->border_radius.top_left.horizontal, + inner->box.y + inner->border_radius.top_left.vertical, + inner->border_radius.top_left.horizontal, + inner->border_radius.top_left.vertical, + 5 * G_PI / 4, G_PI); + _cairo_ellipsis_negative (cr, + inner->box.x + inner->border_radius.bottom_left.horizontal, + inner->box.y + inner->box.height - inner->border_radius.bottom_left.vertical, + inner->border_radius.bottom_left.horizontal, + inner->border_radius.bottom_left.vertical, + G_PI, 3 * G_PI / 4); + + cairo_close_path (cr); +} + +void +_gtk_rounded_box_clip_path (const GtkRoundedBox *box, + cairo_t *cr) +{ + cairo_rectangle (cr, + box->box.x, box->box.y, + box->box.width, box->box.height); +} |