Add Windows implementation of setTitlebarVisible

JWM demo works with Ctrl+T "Toggle Resize"
Known side-effect/bug of increasing window size on repeated toggles
Update README.md with JWM_DEBUG env instructions

Author: Quezion

README.md

@@ -226,6 +226,18 @@ Run examples without building (use version from the table above):
 ./script/run.py --jwm-version <version>
 ```
 
+### Debugging
+
+Set `JWM_VERBOSE` in process env to see extra log output when running locally.
+
+``` bash
+# Mac / Linux
+export JWM_VERBOSE=true
+
+# Windows
+set JWM_VERBOSE=true
+```
+
 # Contributing
 
 PRs & issue reports are welcome!

examples/dashboard/java/PanelScreens.java

@@ -20,6 +20,8 @@ public PanelScreens(Window window) {
             titleStyles = new Options("Default", "Hidden", "Transparent", "Unified", "Unified Compact", "Unified Transparent", "Unified Compact Transparent");
         } else if (Platform.X11 == Platform.CURRENT) {
             titleStyles = new Options("Default", "Hidden");
+        } else if (Platform.WINDOWS == Platform.CURRENT) {
+            titleStyles = new Options("Default", "Hidden");
         }
     }
 
@@ -66,6 +68,14 @@ public void setTitleStyle(String style) {
             case "Hidden" ->
                 w.setTitlebarVisible(false);
             }
+        } else if (Platform.WINDOWS == Platform.CURRENT) {
+            WindowWin32 w = (WindowWin32) window;
+            switch (style) {
+            case "Default" ->
+                w.setTitlebarVisible(true);
+            case "Hidden" ->
+                w.setTitlebarVisible(false);
+            }
         }
     }
 

windows/cc/WindowWin32.cc

@@ -70,6 +70,19 @@ void jwm::WindowWin32::setTitle(const std::wstring& title) {
     SetWindowTextW(_hWnd, title.c_str());
 }
 
+void jwm::WindowWin32::setTitlebarVisible(bool isVisible) {
+    JWM_VERBOSE("Set titlebar visible=" << isVisible << " for window 0x" << this);
+    if (isVisible == true) {
+        LONG_PTR lStyle = GetWindowLongPtr(_hWnd, GWL_STYLE);
+        lStyle |= (WS_CAPTION | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SYSMENU);
+        SetWindowLongPtr(_hWnd, GWL_STYLE, lStyle);
+    } else {
+        LONG_PTR lStyle = GetWindowLongPtr(_hWnd, GWL_STYLE);
+        lStyle &= ~(WS_CAPTION | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SYSMENU);
+        SetWindowLongPtr(_hWnd, GWL_STYLE, lStyle);
+    }
+}
+
 void jwm::WindowWin32::setIcon(const std::wstring& iconPath) {
     JWM_VERBOSE("Set window icon '" << iconPath << "'");
     // width / height of 0 along with LR_DEFAULTSIZE tells windows to load the default icon size.
@@ -656,6 +669,15 @@ LRESULT jwm::WindowWin32::processEvent(UINT uMsg, WPARAM wParam, LPARAM lParam)
             dispatch(classes::EventWindowFocusOut::kInstance);
             break;
 
+        case WM_STYLECHANGED: {
+            IRect rect = getWindowRect();
+            int windowWidth = rect.getWidth();
+            int windowHeight = rect.getHeight();
+            JWM_VERBOSE("StyleChanged event"
+                        << "window w=" << windowWidth << " h=" << windowHeight);
+            setContentSize(windowWidth, windowHeight);
+            return 0;
+        }
 
         case WM_CLOSE:
             JWM_VERBOSE("Event close");
@@ -1013,6 +1035,12 @@ extern "C" JNIEXPORT void JNICALL Java_io_github_humbleui_jwm_WindowWin32__1nSet
     env->ReleaseStringChars(title, titleStr);
 }
 
+extern "C" JNIEXPORT void JNICALL Java_io_github_humbleui_jwm_WindowWin32__1nSetTitlebarVisible
+(JNIEnv* env, jobject obj, jboolean isVisible) {
+    jwm::WindowWin32* instance = reinterpret_cast<jwm::WindowWin32*>(jwm::classes::Native::fromJava(env, obj));
+    instance->setTitlebarVisible(isVisible);
+}
+
 extern "C" JNIEXPORT void JNICALL Java_io_github_humbleui_jwm_WindowWin32__1nSetIcon
         (JNIEnv* env, jobject obj, jstring iconPath) {
     jwm::WindowWin32* instance = reinterpret_cast<jwm::WindowWin32*>(jwm::classes::Native::fromJava(env, obj));

windows/cc/WindowWin32.hh

@@ -51,6 +51,7 @@ namespace jwm {
         void unmarkText();
         void setImeEnabled(bool enabled);
         void setTitle(const std::wstring& title);
+        void setTitlebarVisible(bool isVisible);
         void setIcon(const std::wstring& iconPath);
         void setOpacity(float opacity);
         float getOpacity();

windows/java/WindowWin32.java

@@ -68,7 +68,6 @@ public Window setTitle(String title) {
         return this;
     }
 
-
     @Override
     public Window setIcon(File icon){
         assert _onUIThread() : "Should be run on UI thread";
@@ -78,7 +77,9 @@ public Window setIcon(File icon){
 
     @Override
     public Window setTitlebarVisible(boolean value) {
-        throw new UnsupportedOperationException("impl me!");
+        assert _onUIThread();
+        _nSetTitlebarVisible(value);
+        return this;
     }
 
     @Override
@@ -225,6 +226,7 @@ public Window winSetParent(long hwnd) {
     @ApiStatus.Internal public native void _nSetWindowSize(int width, int height);
     @ApiStatus.Internal public native void _nSetContentSize(int width, int height);
     @ApiStatus.Internal public native void _nSetTitle(String title);
+    @ApiStatus.Internal public native void _nSetTitlebarVisible(boolean isVisible);
     @ApiStatus.Internal public native void _nSetIcon(String iconPath);
     @ApiStatus.Internal public native void _nSetVisible(boolean isVisible);
     @ApiStatus.Internal public native void _nSetOpacity(float opacity);