rework grid layout

Fractional expand is now supported like Qt, and also per row/column
instead of as a widget attribute.

Instead of margins, you're now supposed to use empty rows/columns instead.
Spacer is also gone, use empty rows/columns with minimum size.

Layout engine is prepared to directly calculate edit, button, etc.
sizes without subclassing these controls

1 files changed, 29 insertions, 20 deletions

diff --git a/alf/alflayout.h b/alf/alflayout.h
index e326490..10fa09d 100644
--- a/alf/alflayout.h
+++ b/alf/alflayout.h
@@ -6,22 +6,35 @@
 typedef struct {
     ALFListHeader list;
     HWND hwnd;
-    UINT x;
-    UINT y;
-    UINT cptWidth;
-    UINT cptHeight;
-    UINT cptMarginTop;
-    UINT cptMarginRight;
-    UINT cptMarginBottom;
-    UINT cptMarginLeft;
+    int x;
+    int y;
+    int width;
+    int height;
     DWORD flags;
 } ALFWidgetPriv;
 
 typedef struct {
-    int minWidth;
+    HWND hwnd;
+    int x;
+    int y;
+    int width;
+    int height;
+    DWORD flags;
+} ALFAddWidgetParams;
+
+typedef struct {
+    // properties set by user
+    int requestedMinWidth;
+    int requestedExpandNumerator;
+    int requestedFlags;
+
+    // calculated properties
+    int calculatedMinWidth;
+    int calculatedExpandNumerator;
+
+    // allocated size for layout application
     int allocatedWidth;
     int allocatedPosition;
-    int expand : 1;
 } ALFLayoutRowOrColumn;
 
 #define ALF_LAYOUT_NEED_RECALC   ((DWORD)1)
@@ -35,8 +48,10 @@ typedef struct {
     int                   nRows;
     int                   totalMinWidth;
     int                   totalMinHeight;
-    int                   expandoColumnCount;
-    int                   expandoRowCount;
+    int                   columnExpandDenominator;
+    int                   rowExpandDenominator;
+    int                   biggestColumnNo;
+    int                   biggestRowNo;
     DWORD                 layoutValididityFlags;
 } ALFLayout;
 
@@ -53,22 +68,16 @@ void
 ALF_Layout_Apply(ALFLayout *layout, HWND window);
 
 void
-ALF_Layout_AddWidget(ALFLayout *layout, HWND window, const ALFWidgetLayoutParams *params);
+ALF_Layout_AddWidget(ALFLayout *layout, HWND window, const ALFAddWidgetParams *params);
 
 BOOL
 ALF_Layout_RemoveWidget(ALFLayout *layout, HWND window, HWND widget, BOOL destroy);
 
 BOOL
-ALF_Layout_SetWidgetParams(ALFLayout *layout, HWND window, const ALFWidgetLayoutParams *params, HWND widget);
-
-BOOL
-ALF_Layout_GetWidgetParams(ALFLayout *layout, ALFWidgetLayoutParams *params, HWND widget);
-
-BOOL
 ALF_Layout_HandleMessage(ALFLayout *layout, HWND window, UINT msg, WPARAM wparam, LPARAM lparam, LRESULT *ret);
 
 HWND
-ALF_Layout_WidgetAtPos(ALFLayout *layout, UINT x, UINT y);
+ALF_Layout_WidgetAtPos(ALFLayout *layout, int x, int y);
 
 void
 ALF_Layout_Invalidate(ALFLayout *layout, HWND window);