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Diffstat (limited to 'src/CustomComponents.vala')
| -rw-r--r-- | src/CustomComponents.vala | 513 |
1 files changed, 513 insertions, 0 deletions
diff --git a/src/CustomComponents.vala b/src/CustomComponents.vala new file mode 100644 index 0000000..4ace52c --- /dev/null +++ b/src/CustomComponents.vala @@ -0,0 +1,513 @@ +/* Copyright 2009-2014 Yorba Foundation + * + * This software is licensed under the GNU LGPL (version 2.1 or later). + * See the COPYING file in this distribution. + */ + +extern void qsort(void *p, size_t num, size_t size, GLib.CompareFunc func); + +public class ThemeLoader { + private struct LightweightColor { + public uchar red; + public uchar green; + public uchar blue; + + public LightweightColor() { + red = green = blue = 0; + } + } + + private const int NUM_SUPPORTED_INTENSITIES = 6; + private const int THEME_OUTLINE_COLOR = 0; + private const int THEME_BEVEL_DARKER_COLOR = 1; + private const int THEME_BEVEL_DARK_COLOR = 2; + private const int THEME_BASE_COLOR = 3; + private const int THEME_BEVEL_LIGHT_COLOR = 4; + private const int THEME_BEVEL_LIGHTER_COLOR = 5; + + private static LightweightColor[] theme_colors = null; + + private static void populate_theme_params() { + if (theme_colors != null) + return; + + theme_colors = new LightweightColor[NUM_SUPPORTED_INTENSITIES]; + + Gtk.Settings settings = Gtk.Settings.get_default(); + HashTable<string, Gdk.Color?> color_table = settings.color_hash; + Gdk.Color? base_color = color_table.lookup("bg_color"); + if (base_color == null && !Gdk.Color.parse("#fff", out base_color)) + error("can't parse color"); + + RGBAnalyticPixel base_color_analytic_rgb = + RGBAnalyticPixel.from_quantized_components(base_color.red >> 8, + base_color.green >> 8, base_color.blue >> 8); + HSVAnalyticPixel base_color_analytic_hsv = + HSVAnalyticPixel.from_rgb(base_color_analytic_rgb); + + HSVAnalyticPixel bevel_light_analytic_hsv = base_color_analytic_hsv; + bevel_light_analytic_hsv.light_value *= 1.15f; + bevel_light_analytic_hsv.light_value = + bevel_light_analytic_hsv.light_value.clamp(0.0f, 1.0f); + + HSVAnalyticPixel bevel_lighter_analytic_hsv = bevel_light_analytic_hsv; + bevel_lighter_analytic_hsv.light_value *= 1.15f; + bevel_lighter_analytic_hsv.light_value = + bevel_lighter_analytic_hsv.light_value.clamp(0.0f, 1.0f); + + HSVAnalyticPixel bevel_dark_analytic_hsv = base_color_analytic_hsv; + bevel_dark_analytic_hsv.light_value *= 0.85f; + bevel_dark_analytic_hsv.light_value = + bevel_dark_analytic_hsv.light_value.clamp(0.0f, 1.0f); + + HSVAnalyticPixel bevel_darker_analytic_hsv = bevel_dark_analytic_hsv; + bevel_darker_analytic_hsv.light_value *= 0.85f; + bevel_darker_analytic_hsv.light_value = + bevel_darker_analytic_hsv.light_value.clamp(0.0f, 1.0f); + + HSVAnalyticPixel outline_analytic_hsv = bevel_darker_analytic_hsv; + outline_analytic_hsv.light_value *= 0.66f; + outline_analytic_hsv.light_value = + outline_analytic_hsv.light_value.clamp(0.0f, 1.0f); + + RGBAnalyticPixel outline_analytic_rgb = outline_analytic_hsv.to_rgb(); + theme_colors[THEME_OUTLINE_COLOR] = + populate_one_theme_param(outline_analytic_rgb); + + RGBAnalyticPixel bevel_darker_analytic_rgb = bevel_darker_analytic_hsv.to_rgb(); + theme_colors[THEME_BEVEL_DARKER_COLOR] = + populate_one_theme_param(bevel_darker_analytic_rgb); + + RGBAnalyticPixel bevel_dark_analytic_rgb = bevel_dark_analytic_hsv.to_rgb(); + theme_colors[THEME_BEVEL_DARK_COLOR] = + populate_one_theme_param(bevel_dark_analytic_rgb); + + theme_colors[THEME_BASE_COLOR] = + populate_one_theme_param(base_color_analytic_rgb); + + RGBAnalyticPixel bevel_light_analytic_rgb = bevel_light_analytic_hsv.to_rgb(); + theme_colors[THEME_BEVEL_LIGHT_COLOR] = + populate_one_theme_param(bevel_light_analytic_rgb); + + RGBAnalyticPixel bevel_lighter_analytic_rgb = bevel_light_analytic_hsv.to_rgb(); + theme_colors[THEME_BEVEL_LIGHTER_COLOR] = + populate_one_theme_param(bevel_lighter_analytic_rgb); + } + + private static LightweightColor populate_one_theme_param(RGBAnalyticPixel from) { + LightweightColor into = LightweightColor(); + + into.red = (uchar)(from.red * 255.0f); + into.green = (uchar)(from.green * 255.0f); + into.blue = (uchar)(from.blue * 255.0f); + + return into; + } + + public static Gdk.Pixbuf load_icon(string source_basename) { + populate_theme_params(); + + Gdk.Pixbuf loaded_pixbuf = Resources.get_icon(source_basename, 0).copy(); + + /* Sweep through the icon image data loaded from disk and determine how many + unique colors are in it. We do this with the aid of a HashSet. */ + Gee.HashSet<RGBAnalyticPixel?> colors = + new Gee.HashSet<RGBAnalyticPixel?>(rgb_pixel_hash_func, + rgb_pixel_equal_func); + unowned uchar[] pixel_data = loaded_pixbuf.get_pixels(); + for (int j = 0; j < loaded_pixbuf.height; j++) { + for (int i = 0; i < loaded_pixbuf.width; i++) { + int pixel_index = (j * loaded_pixbuf.rowstride) + (i * loaded_pixbuf.n_channels); + + RGBAnalyticPixel pixel_color = RGBAnalyticPixel.from_quantized_components( + pixel_data[pixel_index], pixel_data[pixel_index + 1], + pixel_data[pixel_index + 2]); + colors.add(pixel_color); + } + } + + /* If the image data loaded from disk didn't contain NUM_SUPPORTED_INTENSITIES + colors, then we can't unambiguously map the colors in the loaded image data + to theme colors on the user's system, so propagate an error */ + if (colors.size != NUM_SUPPORTED_INTENSITIES) + error("ThemeLoader: load_icon: pixbuf does not contain the correct number " + + "of unique colors"); + + /* sort the colors in the loaded image data in order of increasing intensity; this + means that we have to convert the loaded colors from RGB to HSV format */ + HSVAnalyticPixel[] hsv_pixels = new HSVAnalyticPixel[6]; + int pixel_ticker = 0; + foreach (RGBAnalyticPixel rgb_pixel in colors) + hsv_pixels[pixel_ticker++] = HSVAnalyticPixel.from_rgb(rgb_pixel); + qsort(hsv_pixels, hsv_pixels.length, sizeof(HSVAnalyticPixel), hsv_pixel_compare_func); + + /* step through each pixel in the image data loaded from disk and map its color + to one of the user's theme colors */ + for (int j = 0; j < loaded_pixbuf.height; j++) { + for (int i = 0; i < loaded_pixbuf.width; i++) { + int pixel_index = (j * loaded_pixbuf.rowstride) + (i * loaded_pixbuf.n_channels); + RGBAnalyticPixel pixel_color = RGBAnalyticPixel.from_quantized_components( + pixel_data[pixel_index], pixel_data[pixel_index + 1], + pixel_data[pixel_index + 2]); + HSVAnalyticPixel pixel_color_hsv = HSVAnalyticPixel.from_rgb(pixel_color); + int this_intensity = 0; + for (int k = 0; k < NUM_SUPPORTED_INTENSITIES; k++) { + if (hsv_pixels[k].light_value == pixel_color_hsv.light_value) { + this_intensity = k; + break; + } + } + pixel_data[pixel_index] = theme_colors[this_intensity].red; + pixel_data[pixel_index + 1] = theme_colors[this_intensity].green; + pixel_data[pixel_index + 2] = theme_colors[this_intensity].blue; + } + } + + return loaded_pixbuf; + } + + private static int hsv_pixel_compare_func(void* pixval1, void* pixval2) { + HSVAnalyticPixel pixel_val_1 = * ((HSVAnalyticPixel*) pixval1); + HSVAnalyticPixel pixel_val_2 = * ((HSVAnalyticPixel*) pixval2); + + return (int) (255.0f * (pixel_val_1.light_value - pixel_val_2.light_value)); + } + + private static bool rgb_pixel_equal_func(RGBAnalyticPixel? p1, RGBAnalyticPixel? p2) { + return (p1.equals(p2)); + } + + private static uint rgb_pixel_hash_func(RGBAnalyticPixel? pixel_val) { + return pixel_val.hash_code(); + } +} + +public class RGBHistogramManipulator : Gtk.DrawingArea { + private enum LocationCode { LEFT_NUB, RIGHT_NUB, LEFT_TROUGH, RIGHT_TROUGH, + INSENSITIVE_AREA } + private const int NUB_SIZE = 13; + private const int NUB_HALF_WIDTH = NUB_SIZE / 2; + private const int NUB_V_NUDGE = 4; + private const int TROUGH_WIDTH = 256 + (2 * NUB_HALF_WIDTH); + private const int TROUGH_HEIGHT = 4; + private const int TROUGH_BOTTOM_OFFSET = 1; + private const int CONTROL_WIDTH = TROUGH_WIDTH + 2; + private const int CONTROL_HEIGHT = 118; + private const int NUB_V_POSITION = CONTROL_HEIGHT - TROUGH_HEIGHT - TROUGH_BOTTOM_OFFSET + - (NUB_SIZE - TROUGH_HEIGHT) / 2 - NUB_V_NUDGE - 2; + private int left_nub_max = 255 - NUB_SIZE - 1; + private int right_nub_min = NUB_SIZE + 1; + + private static Gtk.Widget dummy_slider = null; + private static Gtk.Widget dummy_frame = null; + private static Gtk.WidgetPath slider_draw_path = new Gtk.WidgetPath(); + private static Gtk.WidgetPath frame_draw_path = new Gtk.WidgetPath(); + private static bool paths_setup = false; + + private RGBHistogram histogram = null; + private int left_nub_position = 0; + private int right_nub_position = 255; + private Gdk.Pixbuf nub_pixbuf = ThemeLoader.load_icon("drag_nub.png"); + private bool is_left_nub_tracking = false; + private bool is_right_nub_tracking = false; + private int track_start_x = 0; + private int track_nub_start_position = 0; + + public RGBHistogramManipulator( ) { + set_size_request(CONTROL_WIDTH, CONTROL_HEIGHT); + + if (dummy_slider == null) + dummy_slider = new Gtk.Scale(Gtk.Orientation.HORIZONTAL, null); + + if (dummy_frame == null) + dummy_frame = new Gtk.Frame(null); + + if (!paths_setup) { + slider_draw_path.append_type(typeof(Gtk.Scale)); + slider_draw_path.iter_add_class(0, "scale"); + slider_draw_path.iter_add_class(0, "range"); + + frame_draw_path.append_type(typeof(Gtk.Frame)); + frame_draw_path.iter_add_class(0, "default"); + + paths_setup = true; + } + + add_events(Gdk.EventMask.BUTTON_PRESS_MASK); + add_events(Gdk.EventMask.BUTTON_RELEASE_MASK); + add_events(Gdk.EventMask.BUTTON_MOTION_MASK); + + button_press_event.connect(on_button_press); + button_release_event.connect(on_button_release); + motion_notify_event.connect(on_button_motion); + } + + private LocationCode hit_test_point(int x, int y) { + if (y < NUB_V_POSITION) + return LocationCode.INSENSITIVE_AREA; + + if ((x > left_nub_position) && (x < left_nub_position + NUB_SIZE)) + return LocationCode.LEFT_NUB; + + if ((x > right_nub_position) && (x < right_nub_position + NUB_SIZE)) + return LocationCode.RIGHT_NUB; + + if (y < (NUB_V_POSITION + NUB_V_NUDGE + 1)) + return LocationCode.INSENSITIVE_AREA; + + if ((x - left_nub_position) * (x - left_nub_position) < + (x - right_nub_position) * (x - right_nub_position)) + return LocationCode.LEFT_TROUGH; + else + return LocationCode.RIGHT_TROUGH; + } + + private bool on_button_press(Gdk.EventButton event_record) { + LocationCode loc = hit_test_point((int) event_record.x, (int) event_record.y); + + switch (loc) { + case LocationCode.LEFT_NUB: + track_start_x = ((int) event_record.x); + track_nub_start_position = left_nub_position; + is_left_nub_tracking = true; + return true; + + case LocationCode.RIGHT_NUB: + track_start_x = ((int) event_record.x); + track_nub_start_position = right_nub_position; + is_right_nub_tracking = true; + return true; + + case LocationCode.LEFT_TROUGH: + left_nub_position = ((int) event_record.x) - NUB_HALF_WIDTH; + left_nub_position = left_nub_position.clamp(0, left_nub_max); + force_update(); + nub_position_changed(); + update_nub_extrema(); + return true; + + case LocationCode.RIGHT_TROUGH: + right_nub_position = ((int) event_record.x) - NUB_HALF_WIDTH; + right_nub_position = right_nub_position.clamp(right_nub_min, 255); + force_update(); + nub_position_changed(); + update_nub_extrema(); + return true; + + default: + return false; + } + } + + private bool on_button_release(Gdk.EventButton event_record) { + if (is_left_nub_tracking || is_right_nub_tracking) { + nub_position_changed(); + update_nub_extrema(); + } + + is_left_nub_tracking = false; + is_right_nub_tracking = false; + + return false; + } + + private bool on_button_motion(Gdk.EventMotion event_record) { + if ((!is_left_nub_tracking) && (!is_right_nub_tracking)) + return false; + + if (is_left_nub_tracking) { + int track_x_delta = ((int) event_record.x) - track_start_x; + left_nub_position = (track_nub_start_position + track_x_delta); + left_nub_position = left_nub_position.clamp(0, left_nub_max); + } else { /* right nub is tracking */ + int track_x_delta = ((int) event_record.x) - track_start_x; + right_nub_position = (track_nub_start_position + track_x_delta); + right_nub_position = right_nub_position.clamp(right_nub_min, 255); + } + + force_update(); + return true; + } + + public override bool draw(Cairo.Context ctx) { + Gtk.Border padding = get_style_context().get_padding(Gtk.StateFlags.NORMAL); + + Gdk.Rectangle area = Gdk.Rectangle(); + area.x = padding.left; + area.y = padding.top; + area.width = RGBHistogram.GRAPHIC_WIDTH + padding.right; + area.height = RGBHistogram.GRAPHIC_HEIGHT + padding.bottom; + + draw_histogram_frame(ctx, area); + draw_histogram(ctx, area); + draw_trough(ctx, area); + draw_nub(ctx, area, left_nub_position); + draw_nub(ctx, area, right_nub_position); + + return true; + } + + private void draw_histogram_frame(Cairo.Context ctx, Gdk.Rectangle area) { + // the framed area is inset and slightly smaller than the overall histogram + // control area + Gdk.Rectangle framed_area = area; + framed_area.x += 5; + framed_area.y += 1; + framed_area.width -= 8; + framed_area.height -= 12; + + Gtk.StyleContext stylectx = dummy_frame.get_style_context(); + stylectx.save(); + + stylectx.get_path().append_type(typeof(Gtk.Frame)); + stylectx.get_path().iter_add_class(0, "default"); + stylectx.add_class(Gtk.STYLE_CLASS_TROUGH); + stylectx.set_junction_sides(Gtk.JunctionSides.TOP | Gtk.JunctionSides.BOTTOM | + Gtk.JunctionSides.LEFT | Gtk.JunctionSides.RIGHT); + + stylectx.render_frame(ctx, framed_area.x, framed_area.y, framed_area.width, + framed_area.height); + + stylectx.restore(); + } + + private void draw_histogram(Cairo.Context ctx, Gdk.Rectangle area) { + if (histogram == null) + return; + + Gdk.Pixbuf histogram_graphic = histogram.get_graphic().copy(); + unowned uchar[] pixel_data = histogram_graphic.get_pixels(); + + int edge_blend_red = 0; + int edge_blend_green = 0; + int edge_blend_blue = 0; + int body_blend_red = 20; + int body_blend_green = 20; + int body_blend_blue = 20; + + if (left_nub_position > 0) { + int edge_pixel_index = histogram_graphic.n_channels * left_nub_position; + for (int i = 0; i < histogram_graphic.height; i++) { + int body_pixel_index = i * histogram_graphic.rowstride; + int row_last_pixel = body_pixel_index + histogram_graphic.n_channels * + left_nub_position; + while (body_pixel_index < row_last_pixel) { + pixel_data[body_pixel_index] = + (uchar) ((pixel_data[body_pixel_index] + body_blend_red) / 2); + pixel_data[body_pixel_index + 1] = + (uchar) ((pixel_data[body_pixel_index + 1] + body_blend_green) / 2); + pixel_data[body_pixel_index + 2] = + (uchar) ((pixel_data[body_pixel_index + 2] + body_blend_blue) / 2); + + body_pixel_index += histogram_graphic.n_channels; + } + + pixel_data[edge_pixel_index] = + (uchar) ((pixel_data[edge_pixel_index] + edge_blend_red) / 2); + pixel_data[edge_pixel_index + 1] = + (uchar) ((pixel_data[edge_pixel_index + 1] + edge_blend_green) / 2); + pixel_data[edge_pixel_index + 2] = + (uchar) ((pixel_data[edge_pixel_index + 2] + edge_blend_blue) / 2); + + edge_pixel_index += histogram_graphic.rowstride; + } + } + + edge_blend_red = 250; + edge_blend_green = 250; + edge_blend_blue = 250; + body_blend_red = 200; + body_blend_green = 200; + body_blend_blue = 200; + + if (right_nub_position < 255) { + int edge_pixel_index = histogram_graphic.n_channels * right_nub_position; + for (int i = 0; i < histogram_graphic.height; i++) { + int body_pixel_index = i * histogram_graphic.rowstride + + histogram_graphic.n_channels * 255; + int row_last_pixel = i * histogram_graphic.rowstride + + histogram_graphic.n_channels * right_nub_position; + while (body_pixel_index > row_last_pixel) { + pixel_data[body_pixel_index] = + (uchar) ((pixel_data[body_pixel_index] + body_blend_red) / 2); + pixel_data[body_pixel_index + 1] = + (uchar) ((pixel_data[body_pixel_index + 1] + body_blend_green) / 2); + pixel_data[body_pixel_index + 2] = + (uchar) ((pixel_data[body_pixel_index + 2] + body_blend_blue) / 2); + + body_pixel_index -= histogram_graphic.n_channels; + } + pixel_data[edge_pixel_index] = + (uchar) ((pixel_data[edge_pixel_index] + edge_blend_red) / 2); + pixel_data[edge_pixel_index + 1] = + (uchar) ((pixel_data[edge_pixel_index + 1] + edge_blend_green) / 2); + pixel_data[edge_pixel_index + 2] = + (uchar) ((pixel_data[edge_pixel_index + 2] + edge_blend_blue) / 2); + + edge_pixel_index += histogram_graphic.rowstride; + } + } + + Gdk.cairo_set_source_pixbuf(ctx, histogram_graphic, area.x + NUB_HALF_WIDTH, area.y + 2); + ctx.paint(); + } + + private void draw_trough(Cairo.Context ctx, Gdk.Rectangle area) { + int trough_x = area.x; + int trough_y = area.y + (CONTROL_HEIGHT - TROUGH_HEIGHT - TROUGH_BOTTOM_OFFSET - 3); + + Gtk.StyleContext stylectx = dummy_slider.get_style_context(); + stylectx.save(); + + stylectx.get_path().append_type(typeof(Gtk.Scale)); + stylectx.get_path().iter_add_class(0, "scale"); + stylectx.add_class(Gtk.STYLE_CLASS_TROUGH); + + stylectx.render_activity(ctx, trough_x, trough_y, TROUGH_WIDTH, TROUGH_HEIGHT); + + stylectx.restore(); + } + + private void draw_nub(Cairo.Context ctx, Gdk.Rectangle area, int position) { + Gdk.cairo_set_source_pixbuf(ctx, nub_pixbuf, area.x + position, area.y + NUB_V_POSITION); + ctx.paint(); + } + + private void force_update() { + get_window().invalidate_rect(null, true); + get_window().process_updates(true); + } + + private void update_nub_extrema() { + right_nub_min = left_nub_position + NUB_SIZE + 1; + left_nub_max = right_nub_position - NUB_SIZE - 1; + } + + public signal void nub_position_changed(); + + public void update_histogram(Gdk.Pixbuf source_pixbuf) { + histogram = new RGBHistogram(source_pixbuf); + force_update(); + } + + public int get_left_nub_position() { + return left_nub_position; + } + + public int get_right_nub_position() { + return right_nub_position; + } + + public void set_left_nub_position(int user_nub_pos) { + assert ((user_nub_pos >= 0) && (user_nub_pos <= 255)); + left_nub_position = user_nub_pos.clamp(0, left_nub_max); + update_nub_extrema(); + } + + public void set_right_nub_position(int user_nub_pos) { + assert ((user_nub_pos >= 0) && (user_nub_pos <= 255)); + right_nub_position = user_nub_pos.clamp(right_nub_min, 255); + update_nub_extrema(); + } +} + |