Merge pull request #88 from weihsinyeh/active_window

Use different colors for active/inactive titles

Author: jserv

include/twin.h

@@ -425,6 +425,7 @@ struct _twin_window {
     twin_window_style_t style;
     twin_rect_t client;
     twin_rect_t damage;
+    bool active;
     bool client_grab;
     bool want_focus;
     bool draw_queued;

src/screen.c

@@ -151,6 +151,25 @@ static void twin_screen_span_pixmap(twin_screen_t maybe_unused *screen,
         op32(dst, src, p_right - p_left);
 }
 
+static twin_pixmap_t *twin_active_pixmap(twin_screen_t *screen,
+                                         twin_pixmap_t **active_pix)
+{
+    twin_pixmap_t *p = NULL, *prev_active_pix = NULL;
+    /*
+     * Identify the previously active pixel map and the currently active pixel
+     * map, which is on the topmost layer.
+     */
+    for (p = screen->bottom; p; p = p->up) {
+        if (p->window->active == true) {
+            prev_active_pix = p;
+            prev_active_pix->window->active = false;
+        }
+        (*active_pix) = p;
+    }
+    (*active_pix)->window->active = true;
+    return prev_active_pix;
+}
+
 void twin_screen_update(twin_screen_t *screen)
 {
     twin_coord_t left = screen->damage.left;
@@ -170,7 +189,7 @@ void twin_screen_update(twin_screen_t *screen)
 
     if (!screen->disable && left < right && top < bottom) {
         twin_argb32_t *span;
-        twin_pixmap_t *p;
+        twin_pixmap_t *p, *active_pix = NULL, *prev_active_pix = NULL;
         twin_coord_t y;
         twin_coord_t width = right - left;
 
@@ -183,6 +202,24 @@ void twin_screen_update(twin_screen_t *screen)
 
         if (screen->put_begin)
             (*screen->put_begin)(left, top, right, bottom, screen->closure);
+
+        prev_active_pix = twin_active_pixmap(screen, &active_pix);
+
+        /*
+         * Mark the previously active pixel map as damaged to update its
+         * changes.
+         */
+        if (prev_active_pix && active_pix != prev_active_pix) {
+            twin_pixmap_damage(prev_active_pix, 0, 0, prev_active_pix->width,
+                               prev_active_pix->height);
+            twin_window_draw(prev_active_pix->window);
+        }
+
+        /* Mark the active pixel map as damaged to update its changes. */
+        twin_pixmap_damage(active_pix, 0, 0, active_pix->width,
+                           active_pix->height);
+        twin_window_draw(active_pix->window);
+
         for (y = top; y < bottom; y++) {
             if (screen->background) {
                 twin_pointer_t dst;

src/window.c

@@ -9,9 +9,10 @@
 #include "twin_private.h"
 
 #define TWIN_ACTIVE_BG 0xd03b80ae
-#define TWIN_INACTIVE_BG 0xff808080
+#define TWIN_INACTIVE_BG 0xffb0b0b0
 #define TWIN_FRAME_TEXT 0xffffffff
 #define TWIN_ACTIVE_BORDER 0xff606060
+#define TWIN_INACTIVE_BORDER 0xff909090
 #define TWIN_BW 0
 #define TWIN_TITLE_HEIGHT 20
 #define TWIN_RESIZE_SIZE ((TWIN_TITLE_HEIGHT + 4) / 5)
@@ -32,6 +33,7 @@ twin_window_t *twin_window_create(twin_screen_t *screen,
         return NULL;
     window->screen = screen;
     window->style = style;
+    window->active = false;
     switch (window->style) {
     case TwinWindowApplication:
         left = TWIN_BW;
@@ -226,9 +228,13 @@ static void twin_window_frame(twin_window_t *window)
                     c_left, c_top);
     twin_path_close(path);
 
-    twin_paint_path(pixmap, TWIN_ACTIVE_BG, path);
-
-    twin_paint_stroke(pixmap, TWIN_ACTIVE_BORDER, path, bw_2 * 2);
+    if (window->active) {
+        twin_paint_path(pixmap, TWIN_ACTIVE_BG, path);
+        twin_paint_stroke(pixmap, TWIN_ACTIVE_BORDER, path, bw_2 * 2);
+    } else {
+        twin_paint_path(pixmap, TWIN_INACTIVE_BG, path);
+        twin_paint_stroke(pixmap, TWIN_INACTIVE_BORDER, path, bw_2 * 2);
+    }
 
     twin_path_empty(path);