From c218c7323a069eedbb42fbc31b0bcd8a664928c1 Mon Sep 17 00:00:00 2001
From: Jonas Kümmerlin <jonas@kuemmerlin.eu>
Date: Thu, 14 May 2020 17:24:09 +0200
Subject: add radio button

---
 alf/alfradiobutton.cpp | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 alf/alfradiobutton.cpp

(limited to 'alf/alfradiobutton.cpp')

diff --git a/alf/alfradiobutton.cpp b/alf/alfradiobutton.cpp
new file mode 100644
index 0000000..2fe6cb6
--- /dev/null
+++ b/alf/alfradiobutton.cpp
@@ -0,0 +1,96 @@
+#include "alfpriv.h"
+
+typedef struct {
+    ALFColor bgcolor;
+    WNDPROC  origWndProc;
+} ALFRadioPriv;
+
+static ALFRadioPriv *
+ALF_Radio_InitializePriv(void)
+{
+    return ALF_New(ALFRadioPriv, 1);
+}
+
+static void
+ALF_Radio_FreePriv(ALFRadioPriv *priv)
+{
+    ALF_Free(priv);
+}
+
+static LRESULT
+ALF_Radio_HandleCtlColor(HWND window, ALFRadioPriv *priv, HDC hDC)
+{
+    (void)priv; (void)window;
+
+    SetTextColor(hDC, GetSysColor(COLOR_BTNTEXT));
+    SetBkColor(hDC, GetSysColor(COLOR_BTNFACE));
+    SetBkMode(hDC, OPAQUE);
+    return (LRESULT)GetSysColorBrush(COLOR_BTNFACE);
+}
+
+static LRESULT CALLBACK
+ALF_Radio_WindowProc(HWND window, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+    ALFRadioPriv *priv = (ALFRadioPriv *)GetWindowLongPtr(window, GWLP_USERDATA);
+
+    if (!priv) // fuck
+        return DefWindowProc(window, msg, wparam, lparam);
+
+    if (msg == ALF_WM_SETBGCOLOR) {
+        ALFColor newColor = (ALFColor)lparam;
+        if (newColor != priv->bgcolor) {
+            priv->bgcolor = newColor;
+            if (ALF_Compat_IsAppThemed())
+                InvalidateRect(window, NULL, TRUE);
+        }
+        return TRUE;
+    }
+
+    if (msg == 0x2000 + WM_CTLCOLORSTATIC || msg == 0x2000 + WM_CTLCOLORBTN) {
+        return ALF_Radio_HandleCtlColor(window, priv, (HDC)wparam);
+    }
+
+    if (msg == ALF_WM_BACKGROUNDCHANGE) {
+        if (priv->bgcolor == ALF_COLOR_TRANSPARENT && ALF_Compat_IsAppThemed()) {
+            InvalidateRect(window, NULL, TRUE);
+        }
+        return TRUE;
+    }
+
+    if (msg == WM_THEMECHANGED) {
+        InvalidateRect(window, NULL, TRUE);
+    }
+
+    if (msg == WM_DESTROY) {
+        WNDPROC orig = priv->origWndProc;
+        SetWindowLongPtr(window, GWLP_WNDPROC, (LONG_PTR)orig);
+        SetWindowLongPtr(window, GWLP_USERDATA, 0);
+        ALF_Radio_FreePriv(priv);
+        return CallWindowProc(orig, window, msg, wparam, lparam);
+    }
+
+    return CallWindowProc(priv->origWndProc, window, msg, wparam, lparam);
+}
+
+HWND
+ALF_AddRadioButton(HWND parent, WORD id, int x, int y, const TCHAR *text)
+{
+    HWND hwnd  = CreateWindowEx(0,
+                                TEXT("BUTTON"),
+                                text,
+                                WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON,
+                                0, 0, 100, 100,
+                                parent,
+                                (HMENU)(ULONG_PTR)id,
+                                ALF_HINSTANCE,
+                                NULL);
+
+    ALFRadioPriv *priv = ALF_Radio_InitializePriv();
+    SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)priv);
+    priv->origWndProc = (WNDPROC)SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)ALF_Radio_WindowProc);
+
+    ALF_AddWidget(parent, x, y, hwnd, 0, 0, ALF_LAYOUT_SIZE_CHECKBOX | ALF_LAYOUT_INHERITFONT | ALF_LAYOUT_INHERITBGCOLOR | ALF_LAYOUT_SENDBGCHANGE);
+
+    return hwnd;
+}
+
-- 
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