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2026-08-06 07:18:14 +02:00
parent 20b9d3a460
commit 12dfec7330
4 changed files with 92 additions and 8 deletions
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37
webview2/Program.cs
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@@ -34,6 +34,7 @@ class MainForm : Form
StartPosition = FormStartPosition.CenterScreen;
Width = 1280;
Height = 800;
MinimumSize = new System.Drawing.Size(480, 360);
ShowInTaskbar = true;
BackColor = System.Drawing.Color.Black;
// No title bar / border. Close with Alt+F4, minimize via the taskbar button.
@@ -41,7 +42,7 @@ class MainForm : Form
if (startMinimized)
{
// Autostart: sit minimized on the taskbar; maximize on first open.
// Autostart: sit minimized on the taskbar; restore to a normal window on first open.
WindowState = FormWindowState.Minimized;
_pendingMaximize = true;
Resize += (_, _) =>
@@ -49,14 +50,12 @@ class MainForm : Form
if (_pendingMaximize && WindowState != FormWindowState.Minimized)
{
_pendingMaximize = false;
WindowState = FormWindowState.Maximized;
WindowState = FormWindowState.Normal;
}
};
}
else
{
WindowState = FormWindowState.Maximized;
}
// else: leave WindowState at its default (Normal) -> starts as a normal
// 1280x800 window, not maximized/fullscreen.
try
{
@@ -133,6 +132,10 @@ class MainForm : Form
case "window-drag":
StartWindowDrag();
break;
case "window-resize":
if (root.TryGetProperty("edge", out var edgeProp))
StartWindowResize(edgeProp.GetString());
break;
case "window-min":
WindowState = FormWindowState.Minimized;
break;
@@ -224,6 +227,28 @@ class MainForm : Form
SendMessage(Handle, WM_NCLBUTTONDOWN, (IntPtr)HTCAPTION, IntPtr.Zero);
}
// --- Free window resize for the borderless window. The WebView2 control
// fills the entire client area, so the OS never gets a chance to hit-test
// the window's own edges for a resize cursor/drag -- every mouse message
// lands in the browser first. The page (bundle.js) instead watches the
// mouse position itself, and on mousedown within a few px of an edge/
// corner sends "window-resize" with which edge; we hand off to the same
// native resize loop Windows uses for a normal sizable window. ---
private static readonly Dictionary<string, int> ResizeEdges = new()
{
["n"] = 12, ["s"] = 15, ["e"] = 11, ["w"] = 10,
["ne"] = 14, ["nw"] = 13, ["se"] = 17, ["sw"] = 16,
};
private void StartWindowResize(string? edge)
{
// Only a normal (non-maximized, non-minimized) window can be resized this way.
if (WindowState != FormWindowState.Normal) return;
if (edge == null || !ResizeEdges.TryGetValue(edge, out var htCode)) return;
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, (IntPtr)htCode, IntPtr.Zero);
}
private static void OpenExternal(string uri)
{
try