diff options
Diffstat (limited to 'chrome/browser/gtk')
| -rw-r--r-- | chrome/browser/gtk/gtk_theme_provider.cc | 89 | ||||
| -rw-r--r-- | chrome/browser/gtk/gtk_theme_provider.h | 7 |
2 files changed, 96 insertions, 0 deletions
diff --git a/chrome/browser/gtk/gtk_theme_provider.cc b/chrome/browser/gtk/gtk_theme_provider.cc index c12ec92..4f35110 100644 --- a/chrome/browser/gtk/gtk_theme_provider.cc +++ b/chrome/browser/gtk/gtk_theme_provider.cc @@ -176,6 +176,95 @@ GdkColor GtkThemeProvider::GetBorderColor() const { return color; } +void GtkThemeProvider::GetScrollbarColors(GdkColor* thumb_active_color, + GdkColor* thumb_inactive_color, + GdkColor* track_color, + bool use_gtk_theme) { + if (!use_gtk_theme) { + // If using the default non-GTK colors, pick some reasonable choices of + // different greys. + thumb_active_color->pixel = 0; + thumb_active_color->red = 64250; + thumb_active_color->green = 63736; + thumb_active_color->blue = 62965; + thumb_inactive_color->pixel = 0; + thumb_inactive_color->red = 61680; + thumb_inactive_color->green = 60395; + thumb_inactive_color->blue = 58853; + track_color->pixel = 0; + track_color->red = 58339; + track_color->green = 56797; + track_color->blue = 55512; + return; + } + + // Create window containing scrollbar elements + GtkWidget* window = gtk_window_new(GTK_WINDOW_POPUP); + GtkWidget* fixed = gtk_fixed_new(); + GtkWidget* scrollbar = gtk_hscrollbar_new(NULL); + gtk_container_add(GTK_CONTAINER(window), fixed); + gtk_container_add(GTK_CONTAINER(fixed), scrollbar); + gtk_widget_realize(window); + gtk_widget_realize(scrollbar); + + // Draw scrollbar thumb part and track into offscreen image + int kWidth = 100; + int kHeight = 20; + GtkStyle* style = gtk_rc_get_style(scrollbar); + GdkPixmap* pm = gdk_pixmap_new(window->window, kWidth, kHeight, -1); + GdkRectangle rect = { 0, 0, kWidth, kHeight }; + unsigned char data[3*kWidth*kHeight]; + for (int i = 0; i < 3; ++i) { + if (i < 2) { + // Thumb part + gtk_paint_slider(style, pm, + i == 0 ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL, + GTK_SHADOW_OUT, &rect, scrollbar, "slider", 0, 0, + kWidth, kHeight, GTK_ORIENTATION_HORIZONTAL); + } else { + // Track + gtk_paint_box(style, pm, GTK_STATE_ACTIVE, GTK_SHADOW_IN, &rect, + scrollbar, "trough-upper", 0, 0, kWidth, kHeight); + } + GdkPixbuf* pb = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, + FALSE, 8, kWidth, kHeight, + 3*kWidth, 0, 0); + gdk_pixbuf_get_from_drawable(pb, pm, NULL, 0, 0, 0, 0, kWidth, kHeight); + + // Sample pixels + int components[3] = { 0 }; + for (int y = 2; y < kHeight-2; ++y) { + for (int c = 0; c < 3; ++c) { + // Sample a vertical slice of pixels at about one-thirds from the + // left edge. This allows us to avoid any fixed graphics that might be + // located at the edges or in the center of the scrollbar. + // Each pixel is made up of a red, green, and blue component; taking up + // a total of three bytes. + components[c] += data[3*(kWidth/3 + y*kWidth) + c]; + } + } + GdkColor* color = i == 0 ? thumb_active_color : + i == 1 ? thumb_inactive_color : + track_color; + color->pixel = 0; + // We sampled pixels across the full height of the image, ignoring a two + // pixel border. In some themes, the border has a completely different + // color which we do not want to factor into our average color computation. + // + // We now need to scale the colors from the 0..255 range, to the wider + // 0..65535 range, and we need to actually compute the average color; so, + // we divide by the total number of pixels in the sample. + color->red = components[0] * 65535 / (255*(kHeight-4)); + color->green = components[1] * 65535 / (255*(kHeight-4)); + color->blue = components[2] * 65535 / (255*(kHeight-4)); + + g_object_unref(pb); + } + g_object_unref(pm); + + gtk_widget_destroy(window); +} + CairoCachedSurface* GtkThemeProvider::GetSurfaceNamed( int id, GtkWidget* widget_on_display) { GdkDisplay* display = gtk_widget_get_display(widget_on_display); diff --git a/chrome/browser/gtk/gtk_theme_provider.h b/chrome/browser/gtk/gtk_theme_provider.h index f39902e..60d72e7 100644 --- a/chrome/browser/gtk/gtk_theme_provider.h +++ b/chrome/browser/gtk/gtk_theme_provider.h @@ -65,6 +65,13 @@ class GtkThemeProvider : public BrowserThemeProvider, // label. Used for borders between GTK stuff and the webcontent. GdkColor GetBorderColor() const; + // This method returns averages of the thumb part and of the track colors. + // Used when rendering scrollbars. + static void GetScrollbarColors(GdkColor* thumb_active_color, + GdkColor* thumb_inactive_color, + GdkColor* track_color, + bool use_gtk_theme); + // Expose the inner label. Only used for testing. GtkWidget* fake_label() { return fake_label_.get(); } |