From 65d9985bdcaed63b52bfe8c35c61d8a4a43a8292 Mon Sep 17 00:00:00 2001
From: Jonas Kümmerlin <jonas@kuemmerlin.eu>
Date: Tue, 28 Apr 2020 10:57:22 +0200
Subject: first try at checkbox

The size calculation is really messy and the background stuff does not
work with comctl v5. Probably need to go full owner-drawn, again.
---
 alf/alflayout.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 2 deletions(-)

(limited to 'alf/alflayout.cpp')

diff --git a/alf/alflayout.cpp b/alf/alflayout.cpp
index 2e56886..6c5326d 100644
--- a/alf/alflayout.cpp
+++ b/alf/alflayout.cpp
@@ -101,8 +101,15 @@ ALF_Layout_ForwardFontToWidget(ALFLayout *layout, HWND window, ALFWidgetPriv *wi
     if (widget->flags & ALF_LAYOUT_INHERITFONT) {
         SendMessage(widget->hwnd, WM_SETFONT, (WPARAM)font, redraw);
 
-        if (widget->flags & ALF_LAYOUT_SIZE_EDIT)
-            ALF_Layout_Invalidate(layout, window);
+        switch (widget->flags & ALF_LAYOUT_SIZETYPE_MASK) {
+            case ALF_LAYOUT_SIZE_EDIT:
+            case ALF_LAYOUT_SIZE_CHECKBOX:
+                ALF_Layout_Invalidate(layout, window);
+                break;
+            default:
+                // do nothing
+                break;
+        }
     }
 }
 
@@ -205,6 +212,42 @@ ALF_Layout_CalcEditSize(HWND hwndWindow, ALFLayout *layout, HWND hwndEdit, SIZE
     ReleaseDC(hwndEdit, hDc);
 }
 
+static void
+ALF_Layout_CalcCheckboxSize(HWND hwndWindow, ALFLayout *layout, HWND hwndCheckbox, SIZE *ps)
+{
+    (void)hwndWindow;
+
+    int checkwidth = 12 * layout->dpi / 96 + 1;
+
+    HDC hDC = GetDC(hwndCheckbox);
+    HFONT font = (HFONT)SendMessage(hwndCheckbox, WM_GETFONT, 0, 0);
+    HFONT oldfont = SelectFont(hDC, font);
+
+    RECT r = { 0, 0, 10, 10 };
+
+    TCHAR *textbuf = ALF_Text(hwndCheckbox);
+    DrawText(hDC, textbuf, -1, &r, DT_CALCRECT);
+    ALF_Free(textbuf);
+
+    if (!ps->cx) {
+        // lol
+        int cw = 0;
+        GetCharWidth(hDC, '0', '0', &cw);
+
+        ps->cx = checkwidth + r.right - r.left + cw;
+    }
+
+    if (!ps->cy) {
+        int height = r.bottom - r.top;
+        if (checkwidth > height)
+            height = checkwidth;
+        ps->cy = height;
+    }
+
+    SelectFont(hDC, oldfont);
+    ReleaseDC(hwndCheckbox, hDC);
+}
+
 static void
 ALF_Layout_CalcMinWidgetSize(ALFLayout *layout, ALFWidgetPriv *c, HWND window, SIZE *s)
 {
@@ -225,6 +268,10 @@ ALF_Layout_CalcMinWidgetSize(ALFLayout *layout, ALFWidgetPriv *c, HWND window, S
             break;
         case ALF_LAYOUT_SIZE_EDIT:
             ALF_Layout_CalcEditSize(window, layout, c->hwnd, s);
+            break;
+        case ALF_LAYOUT_SIZE_CHECKBOX:
+            ALF_Layout_CalcCheckboxSize(window, layout, c->hwnd, s);
+            break;
         default:
             // FIXME! unimplemented
             break;
-- 
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