Re-implement Cairo-based rendering.
This commit is contained in:
Daiki Ueno
886
eek/eek-renderer.c
Normal file
886
eek/eek-renderer.c
Normal file
@ -0,0 +1,886 @@
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#include <math.h>
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#include "eek-key.h"
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#include "eek-section.h"
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#include "eek-renderer.h"
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G_DEFINE_TYPE (EekRenderer, eek_renderer, G_TYPE_OBJECT);
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#define EEK_RENDERER_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), EEK_TYPE_RENDERER, EekRendererPrivate))
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struct _EekRendererPrivate
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{
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EekKeyboard *keyboard;
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PangoContext *pcontext;
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EekColor *foreground;
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EekColor *background;
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gdouble border_width;
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gdouble scale;
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PangoFontDescription *font;
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GHashTable *outline_surface_cache;
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cairo_surface_t *keyboard_surface;
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};
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struct {
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gint category;
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gdouble scale;
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} keysym_category_scale_factors[EEK_KEYSYM_CATEGORY_LAST] = {
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{ EEK_KEYSYM_CATEGORY_LETTER, 1.0 },
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{ EEK_KEYSYM_CATEGORY_FUNCTION, 0.5 },
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{ EEK_KEYSYM_CATEGORY_KEYNAME, 0.5 }
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};
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/* eek-keyboard-drawing.c */
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extern void _eek_rounded_polygon (cairo_t *cr,
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gdouble radius,
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EekPoint *points,
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gint num_points);
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static void invalidate (EekRenderer *renderer);
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static void render_key (EekRenderer *self,
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cairo_t *cr,
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EekKey *key);
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struct _CreateKeyboardSurfaceCallbackData {
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cairo_t *cr;
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EekRenderer *renderer;
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};
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typedef struct _CreateKeyboardSurfaceCallbackData CreateKeyboardSurfaceCallbackData;
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static void
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create_keyboard_surface_key_callback (EekElement *element,
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gpointer user_data)
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{
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CreateKeyboardSurfaceCallbackData *data = user_data;
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(data->renderer);
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EekBounds bounds;
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cairo_save (data->cr);
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eek_element_get_bounds (element, &bounds);
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cairo_translate (data->cr, bounds.x * priv->scale, bounds.y * priv->scale);
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cairo_rectangle (data->cr,
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0.0,
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0.0,
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bounds.width * priv->scale,
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bounds.height * priv->scale);
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cairo_clip (data->cr);
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render_key (data->renderer, data->cr, EEK_KEY(element));
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cairo_restore (data->cr);
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}
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static void
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create_keyboard_surface_section_callback (EekElement *element,
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gpointer user_data)
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{
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CreateKeyboardSurfaceCallbackData *data = user_data;
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(data->renderer);
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EekBounds bounds;
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gint angle;
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cairo_save (data->cr);
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eek_element_get_bounds (element, &bounds);
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cairo_translate (data->cr, bounds.x * priv->scale, bounds.y * priv->scale);
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angle = eek_section_get_angle (EEK_SECTION(element));
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cairo_rotate (data->cr, angle * G_PI / 180);
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eek_container_foreach_child (EEK_CONTAINER(element),
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create_keyboard_surface_key_callback,
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data);
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cairo_restore (data->cr);
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}
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static cairo_surface_t *
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create_keyboard_surface (EekRenderer *renderer)
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{
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(renderer);
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EekBounds bounds;
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cairo_surface_t *keyboard_surface;
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CreateKeyboardSurfaceCallbackData data;
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eek_element_get_bounds (EEK_ELEMENT(priv->keyboard), &bounds);
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keyboard_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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bounds.width * priv->scale,
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bounds.height * priv->scale);
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data.cr = cairo_create (keyboard_surface);
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data.renderer = renderer;
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cairo_translate (data.cr, bounds.x * priv->scale, bounds.y * priv->scale);
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/* blank background */
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cairo_set_source_rgba (data.cr, 0, 0, 0, 0);
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cairo_rectangle (data.cr,
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0.0,
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0.0,
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cairo_image_surface_get_width (keyboard_surface),
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cairo_image_surface_get_height (keyboard_surface));
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cairo_fill (data.cr);
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/* draw sections */
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eek_container_foreach_child (EEK_CONTAINER(priv->keyboard),
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create_keyboard_surface_section_callback,
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&data);
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cairo_destroy (data.cr);
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return keyboard_surface;
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}
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static void
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render_key_outline (EekRenderer *renderer,
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cairo_t *cr,
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EekKey *key)
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{
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(renderer);
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EekOutline *outline;
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EekBounds bounds;
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cairo_pattern_t *pat;
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EekPoint *points;
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gdouble scale;
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gint i;
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/* need to rescale so that the border fit inside the clipping
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region */
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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scale = MIN((bounds.width - priv->border_width) / bounds.width,
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(bounds.height - priv->border_width) / bounds.height);
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outline = eek_key_get_outline (key);
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points = g_slice_copy (sizeof (EekPoint) * outline->num_points,
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outline->points);
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for (i = 0; i < outline->num_points; i++) {
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points[i].x *= priv->scale * scale;
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points[i].y *= priv->scale * scale;
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}
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cairo_translate (cr,
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priv->border_width / 2 * priv->scale,
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priv->border_width / 2 * priv->scale);
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/* paint the background with gradient */
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pat = cairo_pattern_create_linear (0.0,
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0.0,
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0.0,
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bounds.height * priv->scale * 5.0);
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cairo_pattern_add_color_stop_rgba (pat,
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1,
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priv->background->red * 0.5,
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priv->background->green * 0.5,
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priv->background->blue * 0.5,
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priv->background->alpha);
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cairo_pattern_add_color_stop_rgba (pat,
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0,
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priv->background->red,
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priv->background->green,
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priv->background->blue,
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priv->background->alpha);
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cairo_set_source (cr, pat);
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_eek_rounded_polygon (cr,
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outline->corner_radius,
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points,
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outline->num_points);
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cairo_fill (cr);
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cairo_pattern_destroy (pat);
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/* paint the border */
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cairo_set_line_width (cr, priv->border_width * priv->scale);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
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cairo_set_source_rgba
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(cr,
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ABS(priv->background->red - priv->foreground->red) * 0.7,
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ABS(priv->background->green - priv->foreground->green) * 0.7,
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ABS(priv->background->blue - priv->foreground->blue) * 0.7,
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priv->foreground->alpha);
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_eek_rounded_polygon (cr,
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outline->corner_radius,
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points,
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outline->num_points);
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cairo_stroke (cr);
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g_slice_free1 (sizeof (EekPoint) * outline->num_points, points);
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}
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struct _CalculateFontSizeCallbackData {
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gdouble size;
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EekRenderer *renderer;
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};
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typedef struct _CalculateFontSizeCallbackData CalculateFontSizeCallbackData;
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static void
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calculate_font_size_key_callback (EekElement *element, gpointer user_data)
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{
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CalculateFontSizeCallbackData *data = user_data;
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(data->renderer);
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gdouble sx, sy;
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PangoFontDescription *font;
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const PangoFontDescription *base_font;
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PangoRectangle extents = { 0, };
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PangoLayout *layout;
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gdouble size;
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guint keysym;
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EekBounds bounds;
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gchar *label;
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keysym = eek_key_get_keysym (EEK_KEY(element));
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if (keysym == EEK_INVALID_KEYSYM ||
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eek_keysym_get_category (keysym) != EEK_KEYSYM_CATEGORY_LETTER)
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return;
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label = eek_keysym_to_string (keysym);
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if (!label)
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return;
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base_font = pango_context_get_font_description (priv->pcontext);
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font = pango_font_description_copy (base_font);
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eek_element_get_bounds (element, &bounds);
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size = eek_bounds_long_side (&bounds) * PANGO_SCALE;
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pango_font_description_set_size (font, size);
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layout = pango_layout_new (priv->pcontext);
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pango_layout_set_font_description (layout, font);
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pango_font_description_free (font);
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pango_layout_set_text (layout, label, -1);
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g_free (label);
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pango_layout_get_extents (layout, NULL, &extents);
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sx = sy = 1.0;
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if (extents.width > bounds.width * PANGO_SCALE)
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sx = bounds.width * PANGO_SCALE / extents.width;
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if (extents.height > bounds.height * PANGO_SCALE)
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sy = bounds.height * PANGO_SCALE / extents.height;
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g_object_unref (layout);
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size *= MIN(sx, sy);
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if (size < data->size &&
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size >= pango_font_description_get_size (base_font))
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data->size = size;
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}
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static void
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calculate_font_size_section_callback (EekElement *element, gpointer user_data)
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{
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eek_container_foreach_child (EEK_CONTAINER(element),
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calculate_font_size_key_callback,
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user_data);
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}
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static gdouble
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calculate_font_size (EekRenderer *renderer)
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{
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(renderer);
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CalculateFontSizeCallbackData data;
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PangoFontDescription *base_font;
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base_font = pango_context_get_font_description (priv->pcontext);
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data.size = pango_font_description_get_size (base_font);
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data.renderer = renderer;
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eek_container_foreach_child (EEK_CONTAINER(priv->keyboard),
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calculate_font_size_section_callback,
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&data);
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return data.size;
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}
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static void
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render_key_label (EekRenderer *renderer,
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cairo_t *cr,
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EekKey *key)
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{
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(renderer);
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guint keysym;
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EekKeysymCategory category;
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gchar *label;
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PangoLayout *layout;
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PangoRectangle extents = { 0, };
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EekBounds bounds;
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PangoFontDescription *font;
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gdouble size, scale;
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gint i;
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keysym = eek_key_get_keysym (key);
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if (keysym == EEK_INVALID_KEYSYM)
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return;
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category = eek_keysym_get_category (keysym);
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if (category == EEK_KEYSYM_CATEGORY_UNKNOWN)
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return;
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label = eek_keysym_to_string (keysym);
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if (!label)
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return;
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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scale = MIN((bounds.width - priv->border_width) / bounds.width,
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(bounds.height - priv->border_width) / bounds.height);
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layout = pango_cairo_create_layout (cr);
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font = pango_font_description_copy (priv->font);
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size = pango_font_description_get_size (font);
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for (i = 0; i < G_N_ELEMENTS(keysym_category_scale_factors); i++)
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if (keysym_category_scale_factors[i].category == category) {
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size *= keysym_category_scale_factors[i].scale;
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break;
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}
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pango_font_description_set_size (font, size * priv->scale * scale);
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pango_layout_set_font_description (layout, font);
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pango_layout_set_text (layout, label, -1);
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g_free (label);
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pango_layout_set_width (layout,
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PANGO_SCALE * bounds.width * priv->scale * scale);
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pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
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pango_layout_get_extents (layout, NULL, &extents);
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cairo_save (cr);
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cairo_move_to
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(cr,
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(bounds.width * priv->scale - extents.width / PANGO_SCALE) / 2,
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(bounds.height * priv->scale - extents.height / PANGO_SCALE) / 2);
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cairo_set_source_rgba (cr,
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priv->foreground->red,
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priv->foreground->green,
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priv->foreground->blue,
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priv->foreground->alpha);
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pango_cairo_show_layout (cr, layout);
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cairo_restore (cr);
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g_object_unref (layout);
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}
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static void
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render_key (EekRenderer *self,
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cairo_t *cr,
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EekKey *key)
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{
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(self);
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EekOutline *outline;
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cairo_surface_t *outline_surface;
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EekBounds bounds;
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outline = eek_key_get_outline (key);
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outline_surface = g_hash_table_lookup (priv->outline_surface_cache,
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outline);
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if (!outline_surface) {
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cairo_t *cr;
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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outline_surface =
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cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
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bounds.width * priv->scale,
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bounds.height * priv->scale);
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cr = cairo_create (outline_surface);
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/* blank background */
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eek_element_get_bounds (EEK_ELEMENT(key), &bounds);
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cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.0);
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cairo_rectangle (cr,
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0.0,
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0.0,
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bounds.width * priv->scale,
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bounds.height * priv->scale);
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cairo_fill (cr);
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render_key_outline (self, cr, key);
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g_hash_table_insert (priv->outline_surface_cache,
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outline,
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outline_surface);
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}
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if (!priv->font) {
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PangoFontDescription *base_font;
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gdouble size;
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size = calculate_font_size (self);
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base_font = pango_context_get_font_description (priv->pcontext);
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priv->font = pango_font_description_copy (base_font);
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pango_font_description_set_size (priv->font, size);
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}
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cairo_set_source_surface (cr, outline_surface, 0.0, 0.0);
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cairo_paint (cr);
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render_key_label (self, cr, key);
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}
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static void
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eek_renderer_real_render_key (EekRenderer *self,
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cairo_t *cr,
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EekKey *key,
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gdouble scale)
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{
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EekElement *section;
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EekBounds bounds, rotated_bounds;
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gint angle;
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gdouble s;
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eek_renderer_get_key_bounds (self, key, &bounds, FALSE);
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eek_renderer_get_key_bounds (self, key, &rotated_bounds, TRUE);
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section = eek_element_get_parent (EEK_ELEMENT(key));
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angle = eek_section_get_angle (EEK_SECTION(section));
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cairo_save (cr);
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cairo_scale (cr, scale, scale);
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#if DEBUG
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cairo_set_source_rgba (cr, 1.0, 0.0, 0.0, 1.0);
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cairo_rectangle (cr, 0, 0,
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rotated_bounds.width, rotated_bounds.height);
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cairo_stroke (cr);
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cairo_set_source_rgba (cr, 0.0, 1.0, 0.0, 1.0);
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#endif /* DEBUG */
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s = sin (angle * G_PI / 180);
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if (s < 0)
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cairo_translate (cr, 0, - bounds.width * s);
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else
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cairo_translate (cr, bounds.height * s, 0);
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cairo_rotate (cr, angle * G_PI / 180);
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#if DEBUG
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cairo_rectangle (cr,
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0,
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0,
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bounds.width, bounds.height);
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cairo_stroke (cr);
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#endif /* DEBUG */
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render_key (self, cr, key);
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cairo_restore (cr);
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}
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static void
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eek_renderer_real_render_keyboard (EekRenderer *self,
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cairo_t *cr)
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||||
{
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EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(self);
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||||
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if (!priv->keyboard_surface)
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priv->keyboard_surface = create_keyboard_surface (self);
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cairo_set_source_surface (cr, priv->keyboard_surface, 0.0, 0.0);
|
||||
cairo_paint (cr);
|
||||
}
|
||||
|
||||
static void
|
||||
eek_renderer_dispose (GObject *object)
|
||||
{
|
||||
EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(object);
|
||||
|
||||
if (priv->keyboard) {
|
||||
if (g_object_is_floating (priv->keyboard))
|
||||
g_object_unref (priv->keyboard);
|
||||
priv->keyboard = NULL;
|
||||
}
|
||||
if (priv->pcontext) {
|
||||
g_object_unref (priv->pcontext);
|
||||
priv->pcontext = NULL;
|
||||
}
|
||||
|
||||
/* this will release all allocated surfaces and font if any */
|
||||
invalidate (EEK_RENDERER(object));
|
||||
|
||||
G_OBJECT_CLASS (eek_renderer_parent_class)->dispose (object);
|
||||
}
|
||||
|
||||
static void
|
||||
eek_renderer_finalize (GObject *object)
|
||||
{
|
||||
EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(object);
|
||||
|
||||
g_hash_table_destroy (priv->outline_surface_cache);
|
||||
G_OBJECT_CLASS (eek_renderer_parent_class)->finalize (object);
|
||||
}
|
||||
|
||||
static void
|
||||
eek_renderer_class_init (EekRendererClass *klass)
|
||||
{
|
||||
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
||||
|
||||
g_type_class_add_private (gobject_class,
|
||||
sizeof (EekRendererPrivate));
|
||||
|
||||
klass->render_key = eek_renderer_real_render_key;
|
||||
klass->render_keyboard = eek_renderer_real_render_keyboard;
|
||||
|
||||
gobject_class->dispose = eek_renderer_dispose;
|
||||
gobject_class->finalize = eek_renderer_finalize;
|
||||
}
|
||||
|
||||
static void
|
||||
free_surface (gpointer data)
|
||||
{
|
||||
cairo_surface_destroy (data);
|
||||
}
|
||||
|
||||
static void
|
||||
eek_renderer_init (EekRenderer *self)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
priv = self->priv = EEK_RENDERER_GET_PRIVATE(self);
|
||||
priv->keyboard = NULL;
|
||||
priv->pcontext = NULL;
|
||||
priv->foreground = eek_color_new (0.3, 0.3, 0.3, 1.0);
|
||||
priv->background = eek_color_new (1.0, 1.0, 1.0, 1.0);
|
||||
priv->border_width = 3.0;
|
||||
priv->scale = 1.0;
|
||||
priv->font = NULL;
|
||||
priv->outline_surface_cache =
|
||||
g_hash_table_new_full (g_direct_hash,
|
||||
g_direct_equal,
|
||||
NULL,
|
||||
free_surface);
|
||||
priv->keyboard_surface = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
invalidate (EekRenderer *renderer)
|
||||
{
|
||||
EekRendererPrivate *priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
|
||||
if (priv->outline_surface_cache)
|
||||
g_hash_table_remove_all (priv->outline_surface_cache);
|
||||
|
||||
if (priv->keyboard_surface) {
|
||||
cairo_surface_destroy (priv->keyboard_surface);
|
||||
priv->keyboard_surface = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
on_keysym_index_changed (EekKeyboard *keyboard,
|
||||
gint group,
|
||||
gint level,
|
||||
gpointer user_data)
|
||||
{
|
||||
EekRenderer *renderer = user_data;
|
||||
invalidate (renderer);
|
||||
}
|
||||
|
||||
EekRenderer *
|
||||
eek_renderer_new (EekKeyboard *keyboard,
|
||||
PangoContext *pcontext)
|
||||
{
|
||||
EekRenderer *renderer;
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
renderer = g_object_new (EEK_TYPE_RENDERER, NULL);
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
priv->keyboard = g_object_ref_sink (keyboard);
|
||||
priv->pcontext = g_object_ref (pcontext);
|
||||
|
||||
g_signal_connect (keyboard, "keysym-index-changed",
|
||||
G_CALLBACK(on_keysym_index_changed),
|
||||
renderer);
|
||||
|
||||
return renderer;
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_set_preferred_size (EekRenderer *renderer,
|
||||
gdouble width,
|
||||
gdouble height)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
EekBounds bounds;
|
||||
gdouble scale;
|
||||
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (width > 0.0 && height > 0.0);
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
|
||||
eek_element_get_bounds (EEK_ELEMENT(priv->keyboard), &bounds);
|
||||
scale = width > height ? height / bounds.height :
|
||||
width / bounds.width;
|
||||
|
||||
if (scale != priv->scale) {
|
||||
priv->scale = scale;
|
||||
invalidate (renderer);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_get_key_bounds (EekRenderer *renderer,
|
||||
EekKey *key,
|
||||
EekBounds *bounds,
|
||||
gboolean rotate)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
EekElement *section;
|
||||
EekBounds section_bounds, keyboard_bounds;
|
||||
gint angle = 0;
|
||||
EekPoint points[4], min, max;
|
||||
gint i;
|
||||
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (EEK_IS_KEY(key));
|
||||
g_return_if_fail (bounds != NULL);
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
|
||||
section = eek_element_get_parent (EEK_ELEMENT(key));
|
||||
|
||||
eek_element_get_bounds (EEK_ELEMENT(key), bounds);
|
||||
eek_element_get_bounds (section, §ion_bounds);
|
||||
eek_element_get_bounds (EEK_ELEMENT(priv->keyboard), &keyboard_bounds);
|
||||
|
||||
if (!rotate) {
|
||||
bounds->x += keyboard_bounds.x + section_bounds.x;
|
||||
bounds->y += keyboard_bounds.y + section_bounds.y;
|
||||
bounds->x *= priv->scale;
|
||||
bounds->y *= priv->scale;
|
||||
bounds->width *= priv->scale;
|
||||
bounds->height *= priv->scale;
|
||||
return;
|
||||
}
|
||||
points[0].x = bounds->x;
|
||||
points[0].y = bounds->y;
|
||||
points[1].x = points[0].x + bounds->width;
|
||||
points[1].y = points[0].y;
|
||||
points[2].x = points[1].x;
|
||||
points[2].y = points[1].y + bounds->height;
|
||||
points[3].x = points[0].x;
|
||||
points[3].y = points[2].y;
|
||||
|
||||
if (rotate)
|
||||
angle = eek_section_get_angle (EEK_SECTION(section));
|
||||
|
||||
min = points[2];
|
||||
max = points[0];
|
||||
for (i = 0; i < G_N_ELEMENTS(points); i++) {
|
||||
eek_point_rotate (&points[i], angle);
|
||||
if (points[i].x < min.x)
|
||||
min.x = points[i].x;
|
||||
if (points[i].x > max.x)
|
||||
max.x = points[i].x;
|
||||
if (points[i].y < min.y)
|
||||
min.y = points[i].y;
|
||||
if (points[i].y > max.y)
|
||||
max.y = points[i].y;
|
||||
}
|
||||
bounds->x = keyboard_bounds.x + section_bounds.x + min.x;
|
||||
bounds->y = keyboard_bounds.y + section_bounds.y + min.y;
|
||||
bounds->width = (max.x - min.x);
|
||||
bounds->height = (max.y - min.y);
|
||||
bounds->x *= priv->scale;
|
||||
bounds->y *= priv->scale;
|
||||
bounds->width *= priv->scale;
|
||||
bounds->height *= priv->scale;
|
||||
}
|
||||
|
||||
gdouble
|
||||
eek_renderer_get_scale (EekRenderer *renderer)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
g_assert (EEK_IS_RENDERER(renderer));
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
|
||||
return priv->scale;
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_render_key (EekRenderer *renderer,
|
||||
cairo_t *cr,
|
||||
EekKey *key,
|
||||
gdouble scale)
|
||||
{
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (scale >= 0.0);
|
||||
|
||||
EEK_RENDERER_GET_CLASS(renderer)->render_key (renderer, cr, key, scale);
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_render_keyboard (EekRenderer *renderer,
|
||||
cairo_t *cr)
|
||||
{
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
EEK_RENDERER_GET_CLASS(renderer)->render_keyboard (renderer, cr);
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_set_foreground (EekRenderer *renderer,
|
||||
EekColor *foreground)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (foreground);
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
priv->foreground = g_boxed_copy (EEK_TYPE_COLOR, foreground);
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_set_background (EekRenderer *renderer,
|
||||
EekColor *background)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (background);
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
priv->background = g_boxed_copy (EEK_TYPE_COLOR, background);
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_get_foreground (EekRenderer *renderer,
|
||||
EekColor *foreground)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (foreground);
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
*foreground = *priv->foreground;
|
||||
}
|
||||
|
||||
void
|
||||
eek_renderer_get_background (EekRenderer *renderer,
|
||||
EekColor *background)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
|
||||
g_return_if_fail (EEK_IS_RENDERER(renderer));
|
||||
g_return_if_fail (background);
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
*background = *priv->background;
|
||||
}
|
||||
|
||||
struct _FindKeyByPositionCallbackData {
|
||||
EekPoint point;
|
||||
EekPoint origin;
|
||||
gint angle;
|
||||
EekKey *key;
|
||||
EekRenderer *renderer;
|
||||
};
|
||||
typedef struct _FindKeyByPositionCallbackData FindKeyByPositionCallbackData;
|
||||
|
||||
static gboolean
|
||||
sign (EekPoint *p1, EekPoint *p2, EekPoint *p3)
|
||||
{
|
||||
return (p1->x - p3->x) * (p2->y - p3->y) -
|
||||
(p2->x - p3->x) * (p1->y - p3->y);
|
||||
}
|
||||
|
||||
static gint
|
||||
find_key_by_position_key_callback (EekElement *element,
|
||||
gpointer user_data)
|
||||
{
|
||||
FindKeyByPositionCallbackData *data = user_data;
|
||||
EekBounds bounds;
|
||||
EekRendererPrivate *priv;
|
||||
EekPoint points[4];
|
||||
gint i;
|
||||
gboolean b1, b2, b3;
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(data->renderer);
|
||||
|
||||
eek_element_get_bounds (element, &bounds);
|
||||
|
||||
points[0].x = bounds.x;
|
||||
points[0].y = bounds.y;
|
||||
points[1].x = points[0].x + bounds.width;
|
||||
points[1].y = points[0].y;
|
||||
points[2].x = points[1].x;
|
||||
points[2].y = points[1].y + bounds.height;
|
||||
points[3].x = points[0].x;
|
||||
points[3].y = points[2].y;
|
||||
|
||||
for (i = 0; i < G_N_ELEMENTS(points); i++) {
|
||||
eek_point_rotate (&points[i], data->angle);
|
||||
points[i].x += data->origin.x;
|
||||
points[i].y += data->origin.y;
|
||||
points[i].x *= priv->scale;
|
||||
points[i].y *= priv->scale;
|
||||
}
|
||||
|
||||
b1 = sign (&data->point, &points[0], &points[1]) < 0.0;
|
||||
b2 = sign (&data->point, &points[1], &points[2]) < 0.0;
|
||||
b3 = sign (&data->point, &points[2], &points[0]) < 0.0;
|
||||
|
||||
if (b1 == b2 && b2 == b3) {
|
||||
data->key = EEK_KEY(element);
|
||||
return 0;
|
||||
}
|
||||
|
||||
b1 = sign (&data->point, &points[2], &points[3]) < 0.0;
|
||||
b2 = sign (&data->point, &points[3], &points[0]) < 0.0;
|
||||
b3 = sign (&data->point, &points[0], &points[2]) < 0.0;
|
||||
|
||||
if (b1 == b2 && b2 == b3) {
|
||||
data->key = EEK_KEY(element);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
static gint
|
||||
find_key_by_position_section_callback (EekElement *element,
|
||||
gpointer user_data)
|
||||
{
|
||||
FindKeyByPositionCallbackData *data = user_data;
|
||||
EekBounds bounds;
|
||||
EekRendererPrivate *priv;
|
||||
EekPoint origin;
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(data->renderer);
|
||||
|
||||
origin = data->origin;
|
||||
eek_element_get_bounds (element, &bounds);
|
||||
data->origin.x += bounds.x;
|
||||
data->origin.y += bounds.y;
|
||||
data->angle = eek_section_get_angle (EEK_SECTION(element));
|
||||
|
||||
eek_container_find (EEK_CONTAINER(element),
|
||||
find_key_by_position_key_callback,
|
||||
data);
|
||||
data->origin = origin;
|
||||
return data->key ? 0 : -1;
|
||||
}
|
||||
|
||||
EekKey *
|
||||
eek_renderer_find_key_by_position (EekRenderer *renderer,
|
||||
gdouble x,
|
||||
gdouble y)
|
||||
{
|
||||
EekRendererPrivate *priv;
|
||||
EekBounds bounds;
|
||||
FindKeyByPositionCallbackData data;
|
||||
|
||||
g_assert (EEK_IS_RENDERER(renderer));
|
||||
|
||||
priv = EEK_RENDERER_GET_PRIVATE(renderer);
|
||||
eek_element_get_bounds (EEK_ELEMENT(priv->keyboard), &bounds);
|
||||
|
||||
g_assert (x >= bounds.x * priv->scale);
|
||||
g_assert (y >= bounds.y * priv->scale);
|
||||
g_assert (x <= bounds.width * priv->scale);
|
||||
g_assert (y <= bounds.height * priv->scale);
|
||||
|
||||
data.point.x = x;
|
||||
data.point.y = y;
|
||||
data.origin.x = bounds.x;
|
||||
data.origin.y = bounds.y;
|
||||
data.key = NULL;
|
||||
data.renderer = renderer;
|
||||
|
||||
eek_container_find (EEK_CONTAINER(priv->keyboard),
|
||||
find_key_by_position_section_callback,
|
||||
&data);
|
||||
return data.key;
|
||||
}
|
||||
Reference in New Issue
Block a user