From bc4cef92d8efbf97a9215122abc2d7247c287f12 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Fri, 2 Sep 2022 20:16:04 +0200
Subject: Improve Window object.

---
 c/drag.cpp | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 c/drag.cpp

(limited to 'c/drag.cpp')

diff --git a/c/drag.cpp b/c/drag.cpp
new file mode 100644
index 0000000..b92429a
--- /dev/null
+++ b/c/drag.cpp
@@ -0,0 +1,97 @@
+#include <windows.h>
+
+#include "datalistview.h"
+#include "drag.h"
+#include "episodelistview.h"
+#include "win32.h"
+#include "window.h"
+
+bool Dragger::IsDouble(const long time, const POINT& pt)
+{
+	const bool dbl = time-m_time0 <= static_cast<long>(GetDoubleClickTime())
+	&& abs(pt.x-m_pt0.x) <= Metric<SM_CXDOUBLECLK>
+	&& abs(pt.y-m_pt0.y) <= Metric<SM_CYDOUBLECLK>;
+	m_time0 = time;
+	m_pt0 = std::move(pt);
+	return dbl;
+}
+
+bool Dragger::IsDown() const
+{
+	return GetKeyState(VK_LBUTTON) & 0x8000;
+}
+
+bool Dragger::HandleLButtonDown()
+{
+	POINT pt;
+	Require(GetRelativeCursorPos(parent.hWnd, &pt));
+	if (!InDragArea(pt.x, pt.y)) return false;
+
+	if (IsDouble(GetMessageTime(), pt)) {
+		m_bActive = false;
+		Reset();
+	} else
+		m_bActive = true;
+
+	return m_bActive;
+}
+
+bool Dragger::HandleSetCursor()
+{
+	POINT pt;
+	Require(GetRelativeCursorPos(parent.hWnd, &pt));
+
+	extern HCURSOR g_hcSizeNs;
+	bool r = true;
+	if (InDragArea(pt.x, pt.y))
+		SetCursor(g_hcSizeNs);
+	else
+		r = false;
+	if (!m_bActive)
+		return r;
+	Drag(pt.x, pt.y);
+	if (!IsDown()) {
+		m_bActive = false;
+		Done();
+	}
+	return r;
+}
+
+bool DlvDragger::InDragArea(const int x, const int y) const
+{
+	RECT rrDlv;
+	Require(GetRelativeRect(parent.dlv.hWnd, &rrDlv));
+
+	const int pad = EBIsThemeActive()? Dpi(6): 0;
+	const int extra = EBIsThemeActive()? 0: Dpi(2);
+	if (x < rrDlv.left || x > rrDlv.right) return false;
+	if (y < rrDlv.top-pad*2-extra*3 || y > rrDlv.top+extra) return false;
+	return true;
+}
+
+void DlvDragger::Drag(const int, const int y) const
+{
+	RECT rrDlv;
+	Require(GetRelativeRect(parent.dlv.hWnd, &rrDlv));
+
+	if (y < Dpi(50) || y > rrDlv.bottom-Dpi(20)) return;
+
+	int h;
+	h = rrDlv.bottom-y;
+	parent.dlv.SetHeight(h);
+	parent.UpdateLayout();
+	RedrawWindow(parent.hWnd, nullptr, nullptr,
+	    RDW_ERASE|RDW_FRAME|RDW_INVALIDATE|RDW_ALLCHILDREN|RDW_UPDATENOW);
+}
+
+void DlvDragger::Reset() const
+{
+	parent.dlv.SetHeight(0);
+	parent.cfg.heightDlv = 0;
+	parent.UpdateLayout();
+}
+
+void DlvDragger::Done() const
+{
+	parent.cfg.heightDlv = parent.dlv.Height();
+}
-- 
cgit v1.2.3