Add glowing borders around browser items
The styling is mostly hardcoded for now, need to figure it out.
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112
fastiv-browser.c
112
fastiv-browser.c
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@ -23,6 +23,18 @@
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#include "fastiv-view.h"
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// --- Widget ------------------------------------------------------------------
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// _________________________________
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// │ p a d d i n g
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// │ p ╭───────────────────╮ s ╭┄┄┄┄┄
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// │ a │ glow border ┊ │ p ┊
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// │ d │ ┄ ╔═══════════╗ ┄ │ a ┊
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// │ d │ ║ thumbnail ║ │ c ┊ ...
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// │ i │ ┄ ╚═══════════╝ ┄ │ i ┊
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// │ n │ ┊ glow border │ n ┊
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// │ g ╰───────────────────╯ g ╰┄┄┄┄┄
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// │ s p a c i n g
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// │ ╭┄┄┄┄┄┄┄┄┄┄┄┄╮ ╭┄┄┄┄┄┄┄┄┄┄┄┄
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//
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struct _FastivBrowser {
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GtkWidget parent_instance;
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@ -30,6 +42,8 @@ struct _FastivBrowser {
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GArray *entries; ///< [Entry]
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GArray *layouted_rows; ///< [Row]
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int selected;
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cairo_surface_t *glow; ///< CAIRO_FORMAT_A8 mask
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};
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typedef struct entry Entry;
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@ -41,7 +55,10 @@ static const double g_permitted_width_multiplier = 2;
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// Could be split out to also-idiomatic row-spacing/column-spacing properties.
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// TODO(p): Make a property for this.
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static const int g_item_spacing = 5;
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static const int g_item_spacing = 1;
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// All around, from the primary colour to transparency.
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static const int g_item_border = 10;
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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@ -85,6 +102,7 @@ append_row(FastivBrowser *self, int *y, int x, GArray *items_array)
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if (self->layouted_rows->len)
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*y += g_item_spacing;
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*y += g_item_border;
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g_array_append_val(self->layouted_rows, ((Row) {
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.items = g_array_steal(items_array, NULL),
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.x_offset = x,
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@ -93,6 +111,7 @@ append_row(FastivBrowser *self, int *y, int x, GArray *items_array)
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// Not trying to pack them vertically, but this would be the place to do it.
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*y += g_row_height;
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*y += g_item_border;
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}
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static int
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@ -114,7 +133,8 @@ relayout(FastivBrowser *self, int width)
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if (!entry->thumbnail)
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continue;
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int width = cairo_image_surface_get_width(entry->thumbnail);
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int width =
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cairo_image_surface_get_width(entry->thumbnail) + 2 * g_item_border;
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if (!items->len) {
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// Just insert it, whether or not there's any space.
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} else if (x + g_item_spacing + width <= available_width) {
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@ -125,7 +145,8 @@ relayout(FastivBrowser *self, int width)
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x = 0;
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}
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g_array_append_val(items, ((Item) {.entry = entry, .x_offset = x}));
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g_array_append_val(
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items, ((Item){.entry = entry, .x_offset = x + g_item_border}));
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x += width;
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}
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if (items->len) {
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@ -137,6 +158,57 @@ relayout(FastivBrowser *self, int width)
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return y + padding.bottom;
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}
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static void
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draw_item_border(FastivBrowser *self, cairo_t *cr, int width, int height)
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{
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cairo_set_source_rgb(cr, .75, .75, .75);
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cairo_pattern_t *mask = cairo_pattern_create_for_surface(self->glow);
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cairo_matrix_t matrix;
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cairo_pattern_set_extend(mask, CAIRO_EXTEND_PAD);
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cairo_save(cr);
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cairo_translate(cr, -g_item_border, -g_item_border);
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cairo_rectangle(cr, 0, 0, g_item_border + width, g_item_border + height);
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cairo_clip(cr);
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cairo_mask(cr, mask);
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cairo_restore(cr);
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cairo_save(cr);
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cairo_translate(cr, width + g_item_border, height + g_item_border);
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cairo_rectangle(cr, 0, 0, -g_item_border - width, -g_item_border - height);
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cairo_clip(cr);
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cairo_matrix_init_scale(&matrix, -1, -1);
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cairo_pattern_set_matrix(mask, &matrix);
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cairo_mask(cr, mask);
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cairo_restore(cr);
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cairo_pattern_set_extend(mask, CAIRO_EXTEND_NONE);
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cairo_save(cr);
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cairo_translate(cr, width + g_item_border, -g_item_border);
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cairo_matrix_init_scale(&matrix, -1, 1);
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cairo_pattern_set_matrix(mask, &matrix);
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cairo_mask(cr, mask);
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cairo_restore(cr);
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cairo_save(cr);
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cairo_translate(cr, -g_item_border, height + g_item_border);
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cairo_matrix_init_scale(&matrix, 1, -1);
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cairo_pattern_set_matrix(mask, &matrix);
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cairo_mask(cr, mask);
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cairo_restore(cr);
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// TODO(p): Distinguish between an inner and outer border,
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// don't override part of the glow.
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cairo_rectangle(cr, -.5, -.5, width + 1, height + 1);
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cairo_set_source_rgba(cr, 1, 1, 1, 0.75);
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cairo_set_line_width(cr, 1);
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cairo_stroke(cr);
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cairo_pattern_destroy(mask);
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}
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// --- Boilerplate -------------------------------------------------------------
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// TODO(p): For proper navigation, we need to implement GtkScrollable.
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@ -155,7 +227,11 @@ static guint browser_signals[LAST_SIGNAL];
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static void
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fastiv_browser_finalize(GObject *gobject)
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{
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G_GNUC_UNUSED FastivBrowser *self = FASTIV_BROWSER(gobject);
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FastivBrowser *self = FASTIV_BROWSER(gobject);
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g_array_free(self->entries, TRUE);
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g_array_free(self->layouted_rows, TRUE);
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cairo_surface_destroy(self->glow);
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G_OBJECT_CLASS(fastiv_browser_parent_class)->finalize(gobject);
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}
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@ -173,7 +249,7 @@ fastiv_browser_get_preferred_width(
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GtkStyleContext *context = gtk_widget_get_style_context(widget);
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gtk_style_context_get_padding(context, GTK_STATE_FLAG_NORMAL, &padding);
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*minimum = *natural = g_permitted_width_multiplier * g_row_height +
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padding.left + padding.right;;
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padding.left + 2 * g_item_border + padding.right;
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}
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static void
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@ -227,7 +303,7 @@ fastiv_browser_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
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static gboolean
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fastiv_browser_draw(GtkWidget *widget, cairo_t *cr)
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{
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G_GNUC_UNUSED FastivBrowser *self = FASTIV_BROWSER(widget);
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FastivBrowser *self = FASTIV_BROWSER(widget);
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if (!gtk_cairo_should_draw_window(cr, gtk_widget_get_window(widget)))
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return TRUE;
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@ -249,6 +325,12 @@ fastiv_browser_draw(GtkWidget *widget, cairo_t *cr)
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cairo_save(cr);
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cairo_translate (cr, x, y);
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draw_item_border(self, cr, width, height);
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cairo_rectangle(cr, 0, 0, width, height);
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cairo_set_source_rgb(cr, .25, .25, .25);
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cairo_fill(cr);
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cairo_set_source_surface(cr, thumbnail, 0, 0);
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cairo_paint(cr);
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cairo_restore(cr);
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@ -292,6 +374,24 @@ fastiv_browser_init(FastivBrowser *self)
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g_array_set_clear_func(self->layouted_rows, (GDestroyNotify) row_free);
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self->selected = -1;
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self->glow = cairo_image_surface_create(
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CAIRO_FORMAT_A8, g_item_border, g_item_border);
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unsigned char *data = cairo_image_surface_get_data(self->glow);
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int stride = cairo_image_surface_get_stride(self->glow);
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// Smooth out the curve, so that the edge of the glow doesn't stand out
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const double fade_factor = 1.5;
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const int max = g_item_border - 1;
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for (int y = 0; y <= max; y++)
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for (int x = 0; x <= max; x++) {
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int xn = max - x;
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int yn = max - y;
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double v = MIN(sqrt(xn * xn + yn * yn) / max, 1);
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data[y * stride + x] = round(pow(1 - v, fade_factor) * 255);
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}
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cairo_surface_mark_dirty(self->glow);
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}
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static cairo_surface_t *
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2
fastiv.c
2
fastiv.c
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@ -304,7 +304,7 @@ main(int argc, char *argv[])
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gtk_window_set_default_icon_name(PROJECT_NAME);
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const char *style = "fastiv-view, fastiv-browser { background: black; }"
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const char *style = "fastiv-view, fastiv-browser { background: #222; }"
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"fastiv-browser { padding: 5px; }";
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GtkCssProvider *provider = gtk_css_provider_new();
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gtk_css_provider_load_from_data(provider, style, strlen(style), NULL);
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