From 9279dd93c3997a51b227d3380b4da659fcbdff96 Mon Sep 17 00:00:00 2001
From: Jonas Kümmerlin <jonas@kuemmerlin.eu>
Date: Wed, 9 Jan 2019 20:52:10 +0100
Subject: add spacer widget

---
 alf/alf.cpp       |  2 ++
 alf/alf.h         |  4 ++++
 alf/alfpriv.h     |  4 ++++
 alf/alfspacer.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 68 insertions(+)
 create mode 100644 alf/alfspacer.cpp

(limited to 'alf')

diff --git a/alf/alf.cpp b/alf/alf.cpp
index 64b4cc4..6f8d28a 100644
--- a/alf/alf.cpp
+++ b/alf/alf.cpp
@@ -343,6 +343,7 @@ ALF_CreateApplication(HINSTANCE hInstance)
 
     ALF_RegisterComboClass(app);
     ALF_RegisterPanelClass(app);
+    ALF_RegisterSpacerClass(app);
 
     return app;
 }
@@ -352,6 +353,7 @@ ALF_TeardownApplication(ALFAPP app)
 {
     UnregisterClass(app->comboClass, app->hInstance);
     UnregisterClass(app->panelClass, app->hInstance);
+    UnregisterClass(app->spacerClass, app->hInstance);
     HeapFree(GetProcessHeap(), 0, app);
 }
 
diff --git a/alf/alf.h b/alf/alf.h
index 79883be..0c32a20 100644
--- a/alf/alf.h
+++ b/alf/alf.h
@@ -250,6 +250,10 @@ ALF_ComboBoxSetText(HWND combo, const TCHAR *text);
 HWND
 ALF_AddPanel(HWND parent, WORD id, UINT x, UINT y);
 
+// spacer
+HWND
+ALF_AddSpacer(HWND parent, WORD id, UINT x, UINT y, UINT cptWidth, UINT cptHeight, DWORD layoutFlags);
+
 #ifdef __cplusplus
 } // extern C
 #endif
diff --git a/alf/alfpriv.h b/alf/alfpriv.h
index ec7a447..775d421 100644
--- a/alf/alfpriv.h
+++ b/alf/alfpriv.h
@@ -32,6 +32,7 @@ struct ALFAppPriv {
     HINSTANCE           hInstance;
     TCHAR              *comboClass;
     TCHAR              *panelClass;
+    TCHAR              *spacerClass;
 };
 
 int
@@ -49,6 +50,9 @@ ALF_RegisterComboClass(ALFAPP app);
 void
 ALF_RegisterPanelClass(ALFAPP app);
 
+void
+ALF_RegisterSpacerClass(ALFAPP app);
+
 void
 ALF_BuildRandomClassName(const TCHAR *prefix, TCHAR *buf, DWORD cchBuf);
 
diff --git a/alf/alfspacer.cpp b/alf/alfspacer.cpp
new file mode 100644
index 0000000..545dfbc
--- /dev/null
+++ b/alf/alfspacer.cpp
@@ -0,0 +1,58 @@
+#include "alfpriv.h"
+
+void
+ALF_RegisterSpacerClass(ALFAPP app)
+{
+    WNDCLASS cls;
+    ZeroMemory(&cls, sizeof(cls));
+
+    TCHAR  classNameBuf[256];
+    ALF_BuildRandomClassName(TEXT("ALFSpacer"), classNameBuf, 256);
+
+    cls.hInstance = app->hInstance;
+    cls.hCursor = LoadCursor(NULL, (LPTSTR)IDC_ARROW);
+    if (LOBYTE(LOWORD(GetVersion())) >= 4) {
+        cls.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
+    } else {
+        // NT 3.x has white dialog backgrounds
+        cls.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
+    }
+    cls.lpszClassName = classNameBuf;
+    cls.cbWndExtra = sizeof(void*);
+    cls.lpfnWndProc = DefWindowProc;
+
+    ATOM classatom = RegisterClass(&cls);
+    if (!classatom)
+        MessageBox(NULL, TEXT("FATAL: Could not register spacer class"), NULL, MB_OK);
+
+    app->spacerClass = MAKEINTATOM(classatom);
+}
+
+HWND
+ALF_AddSpacer(HWND parent, WORD id, UINT x, UINT y, UINT cptWidth, UINT cptHeight, DWORD layoutFlags)
+{
+    ALFAPP app = ALF_ApplicationFromWindow(parent);
+
+    HWND hwndSpacer = CreateWindowEx(0,
+                                     app->spacerClass,
+                                     TEXT(""),
+                                     WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN,
+                                     0, 0, 0, 0,
+                                     parent,
+                                     (HMENU)(int)id,
+                                     (HINSTANCE)GetWindowLongPtr(parent, GWLP_HINSTANCE),
+                                     (void*)app);
+
+    ALFWidgetLayoutParams p;
+    ZeroMemory(&p, sizeof(p));
+    p.hwnd = hwndSpacer;
+    p.x = x;
+    p.y = y;
+    p.width = cptWidth;
+    p.height = cptHeight;
+    p.flags = layoutFlags;
+
+    ALF_AddWidgetEx(parent, &p);
+
+    return hwndSpacer;
+}
-- 
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