From ae3225a4e7ef86d159fdf27834c453ffcd4da76c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Tue, 2 Aug 2022 20:10:35 +0200
Subject: Implement draggable split.

Next step is to allow a double click to reset the split to be
automatically resized.
---
 c/main.cpp | 64 +++++++++++++++++++++++++++-----------------------------------
 1 file changed, 28 insertions(+), 36 deletions(-)

(limited to 'c/main.cpp')

diff --git a/c/main.cpp b/c/main.cpp
index ebce3a6..477e750 100644
--- a/c/main.cpp
+++ b/c/main.cpp
@@ -4,17 +4,22 @@
 #include <uxtheme.h>
 #include <SWI-Prolog.h>
 
+#include "debug.h"
 #include "resource.h"
 #include "common.h"
 #include "datalistview.h"
 #include "episodelistview.h"
-#include "main.h"
+#include "layout.h"
 #include "pl.h"
 
 /* Looked-up constants. */
 int g_bThemes;
 int g_dpi = 96;
 
+/* Cursors. */
+HCURSOR g_hcArrow = LoadCursor(NULL, IDC_ARROW);
+HCURSOR g_hcSizeNs = LoadCursor(NULL, IDC_SIZENS);
+
 /* Fonts. */
 HFONT g_hfNormal;
 HFONT g_hfBold;
@@ -31,6 +36,9 @@ HWND g_hWndStatus;
 DataListView* g_dlv;
 EpisodeListView* g_elv;
 
+/* Layout handlers. */
+Dragger g_dragDlv;
+
 /* View settings. */
 int g_bViewWatched = 1;
 int g_bViewTVOriginal = 1;
@@ -38,8 +46,8 @@ char g_currentScreenwriter[64];
 
 static LRESULT CALLBACK CBTProc(int, WPARAM, LPARAM);
 static LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
-void WndProcMainMenu(const HWND, unsigned short);
-void WndProcContextMenu(const HWND, unsigned short);
+static void HandleMainMenu(HWND, unsigned short);
+static void HandleContextMenu(HWND, unsigned short);
 static void WaitFor(const char*, const char*);
 static INT_PTR CALLBACK AboutDlgProc(HWND, UINT, WPARAM, LPARAM);
 static void UpdateTheme();
@@ -98,7 +106,7 @@ int WINAPI WinMain(const HINSTANCE hInstance, const HINSTANCE, char* const, cons
 	wc.lpfnWndProc	 = WndProc;
 	wc.hInstance	 = hInstance;
 	wc.hIcon	 = LoadIcon(NULL, IDI_APPLICATION);
-	wc.hCursor	 = LoadCursor(NULL, IDC_ARROW);
+	wc.hCursor	 = g_hcArrow;
 	wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
 	wc.lpszMenuName	 = MAKEINTRESOURCE(IDR_MENU);
 	wc.lpszClassName = L"Episode Browser";
@@ -267,10 +275,10 @@ LRESULT CALLBACK WndProc(const HWND hWnd, const UINT uMsg, const WPARAM wParam,
 		const unsigned short command = LOWORD(wParam);
 		switch (ID_GROUP(command)) {
 		case IDG_MENU:
-			WndProcMainMenu(hWnd, command);
+			HandleMainMenu(hWnd, command);
 			break;
 		case IDG_CTX:
-			WndProcContextMenu(hWnd, command);
+			HandleContextMenu(hWnd, command);
 			break;
 		}
 		break;
@@ -327,6 +335,18 @@ LRESULT CALLBACK WndProc(const HWND hWnd, const UINT uMsg, const WPARAM wParam,
 		SendMessage(g_hWndStatus, SB_SETTEXT, MAKEWPARAM(0,0), (LPARAM)tip);
 		break;
 	    }
+	case WM_LBUTTONDOWN:
+		g_dragDlv.HandleDown();
+		break;
+	case WM_SETCURSOR:
+		if (!g_dragDlv.HandleMove()) {
+			/* Use default cursor. */
+			if ((HWND)wParam == hWnd)
+				return DefWindowProc(hWnd, uMsg, wParam, lParam);
+			else
+				return 0;
+		}
+		return 1;
 	default:
 		return DefWindowProc(hWnd, uMsg, wParam, lParam);
 	}
@@ -335,7 +355,7 @@ LRESULT CALLBACK WndProc(const HWND hWnd, const UINT uMsg, const WPARAM wParam,
 }
 
 /* Process main menu commands. */
-void WndProcMainMenu(const HWND hWnd, unsigned short command)
+void HandleMainMenu(const HWND hWnd, unsigned short command)
 {
 	switch (command) {
 	case IDM_FILE_EXIT:
@@ -402,7 +422,7 @@ void WndProcMainMenu(const HWND hWnd, unsigned short command)
 }
 
 /* Process context menu commands. */
-void WndProcContextMenu(const HWND, unsigned short command)
+void HandleContextMenu(const HWND, unsigned short command)
 {
 	int cNotFound = 0;
 
@@ -528,34 +548,6 @@ INT_PTR CALLBACK AboutDlgProc(const HWND hWnd, const UINT uMsg, const WPARAM wPa
 	return TRUE;
 }
 
-void UpdateLayout(int w, int h)
-{
-	if (!g_hWndStatus) return;
-
-	RECT rc, rrStatus;
-	if (w && h) rc = {0, 0, w, h};
-	else require(GetClientRect(g_hWnd, &rc));
-	require(GetRelativeRect(g_hWndStatus, &rrStatus));
-
-	SendMessage(g_hWnd, WM_SETREDRAW, FALSE, 0);
-
-	/* Resize list views. */
-	const long pad = IsThemeActive()? Dpi(6): 0; /* Add padding in modern themes. */
-	const long cyDlv = rrStatus.top-g_dlv->Height()-pad;
-	require(SetWindowRect(g_dlv->hWnd, pad, cyDlv, rc.right-pad, rrStatus.top-pad));
-	require(SetWindowRect(g_elv->hWnd, pad, pad, rc.right-pad, cyDlv-pad));
-	g_dlv->ResizeColumns(rc.right-pad-pad);
-	g_elv->ResizeColumns(rc.right-pad-pad);
-
-	/* Resize status bar parts. */
-	const int aParts[] = {rc.right-Dpi(55), rc.right};
-	SendMessage(g_hWndStatus, SB_SETPARTS, (WPARAM)sizeof(aParts), (LPARAM)aParts);
-
-	SendMessage(g_hWnd, WM_SETREDRAW, TRUE, 0);
-	RedrawWindow(g_hWnd, NULL, NULL,
-	    RDW_ERASE|RDW_FRAME|RDW_INVALIDATE|RDW_ALLCHILDREN);
-}
-
 /* Try to style application according to current Windows theme. */
 void UpdateTheme()
 {
-- 
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