label: allow custom background color

2 files changed, 28 insertions, 5 deletions

diff --git a/alf/alf.h b/alf/alf.h
index 0d336c9..721a2e5 100644
--- a/alf/alf.h
+++ b/alf/alf.h
@@ -217,7 +217,8 @@ ALF_UpdateFonts(HWND win);
 // Only the following widgets have background colors:
 // - Top-Level window
 // - Panel
-// TODO fix label, button
+// - Label
+// TODO: button, ...
 void
 ALF_SetBackgroundColor(HWND win, ALFColor color);
 
diff --git a/alf/alflabel.cpp b/alf/alflabel.cpp
index 8a878a0..dbb6367 100644
--- a/alf/alflabel.cpp
+++ b/alf/alflabel.cpp
@@ -3,8 +3,9 @@
 /* LABEL */
 
 typedef struct {
-    DWORD style;
-    HFONT font;
+    DWORD    style;
+    HFONT    font;
+    ALFColor bgcolor;
 } ALFLabelPriv;
 
 TCHAR *_alf_labelClass;
@@ -90,7 +91,11 @@ ALF__LabelWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
         PAINTSTRUCT ps;
         HDC hdc = BeginPaint(hwnd, &ps);
 
-        ALF_Compat_DrawThemeParentBackground(hwnd, hdc, &ps.rcPaint);
+        if (priv->bgcolor == ALF_COLOR_TRANSPARENT) {
+            ALF_Compat_DrawThemeParentBackground(hwnd, hdc, &ps.rcPaint);
+        } else {
+            ALF_FillRect(hdc, &ps.rcPaint, priv->bgcolor);
+        }
 
         HFONT oldFont = NULL;
         if (priv->font)
@@ -216,6 +221,22 @@ ALF__LabelWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
                 InvalidateRect(hwnd, NULL, TRUE);
             }
         }
+    } else if (uMsg == ALF_WM_BACKGROUNDCHANGE) {
+        if (priv->bgcolor == ALF_COLOR_TRANSPARENT) {
+            InvalidateRect(hwnd, NULL, TRUE);
+        }
+        return TRUE;
+    } else if (uMsg == ALF_WM_SETBGCOLOR) {
+        ALFColor newcolor = (ALFColor)lParam;
+        if (priv->bgcolor == newcolor)
+            return TRUE;
+
+        priv->bgcolor = newcolor;
+        InvalidateRect(hwnd, NULL, TRUE);
+
+        return TRUE;
+    } else if (uMsg == ALF_WM_GETBGCOLOR) {
+        return (LRESULT)priv->bgcolor;
     } else if (uMsg == WM_DESTROY) {
         ALF_Free(priv);
         SetWindowLongPtr(hwnd, 0, 0);
@@ -238,9 +259,10 @@ ALF_AddLabel(HWND win, WORD id, int x, int y, const TCHAR *text)
 
     ALFLabelPriv *priv = ALF_New(ALFLabelPriv, 1);
     priv->style = ALF_LABEL_ALIGN_LEFT | ALF_LABEL_ALIGN_TOP_LIKE_EDIT;
+    priv->bgcolor = ALF_COLOR_SYS(COLOR_BTNFACE);
     SetWindowLongPtr(hwndLabel, 0, (LONG_PTR)priv);
 
-    ALF_AddWidget(win, x, y, hwndLabel, 0, 0, ALF_LAYOUT_SIZE_QUERY | ALF_LAYOUT_INHERITFONT | ALF_LAYOUT_TRANSPARENTBG);
+    ALF_AddWidget(win, x, y, hwndLabel, 0, 0, ALF_LAYOUT_SIZE_QUERY | ALF_LAYOUT_INHERITFONT | ALF_LAYOUT_INHERITBGCOLOR | ALF_LAYOUT_SENDBGCHANGE);
 
     return hwndLabel;
 }