add setIcon function for Windows (#95 #126)

Author: i10416

examples/java/org/jetbrains/jwm/examples/Example.java

@@ -7,6 +7,8 @@
 import java.util.concurrent.*;
 import java.util.function.*;
 import java.util.stream.*;
+import java.io.File;
+
 
 public class Example implements Consumer<Event> {
     public static int PADDING = 10;
@@ -66,6 +68,7 @@ public Example() {
             case 4 -> window.setWindowPosition(bounds.getLeft() + bounds.getWidth() / 2, bounds.getTop() + bounds.getHeight() / 2);
         }
         window.setTitle("JWM Window #" + count);
+        window.setIcon(new File("sample.ico"));
         window.setMouseCursor(MouseCursor.ARROW);
         window.show();
         window.requestFrame();

linux/java/org/jetbrains/jwm/WindowX11.java

@@ -82,6 +82,12 @@ public Window setMouseCursor(MouseCursor cursor) {
         return this;
     }
 
+    @Override
+    public Window setIcon(File icon) {
+        // TODO #95
+        return this;
+    }
+
     @Override
     public Screen getScreen() {
         assert _onUIThread();

macos/java/org/jetbrains/jwm/WindowMac.java

@@ -72,6 +72,11 @@ public Window setTitle(String title) {
     }
 
     @Override
+    public Window setIcon(File icon) {
+        // TODO #95
+        return this;
+    }
+    
     public Window setMouseCursor(MouseCursor cursor) {
         assert _onUIThread();
         // TODO: impl me!

sample.ico

@@ -4,6 +4,7 @@
 import java.util.function.*;
 import org.jetbrains.annotations.*;
 import org.jetbrains.jwm.impl.*;
+import java.io.File;
 
 public abstract class Window extends RefCounted {
     @ApiStatus.Internal
@@ -54,6 +55,7 @@ public UIRect getContentRectAbsolute() {
     public abstract Window setTitle(String title);
 
     @NotNull @Contract("-> this")
+    public abstract Window setIcon(File icon);
     public abstract Window setMouseCursor(MouseCursor cursor);
 
     public abstract Screen getScreen();

shared/java/org/jetbrains/jwm/Window.java

@@ -68,6 +68,12 @@ void jwm::WindowWin32::setTitle(const std::wstring& title) {
     SetWindowTextW(_hWnd, title.c_str());
 }
 
+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.
+    HICON hicon = (HICON)LoadImage(NULL, iconPath.c_str(), IMAGE_ICON, 0, 0, LR_LOADFROMFILE | LR_DEFAULTSIZE);
+    SendMessage(_hWnd, WM_SETICON, ICON_SMALL, (LPARAM)hicon);
+}
 void jwm::WindowWin32::setMouseCursor(MouseCursor cursor) {
     JWM_VERBOSE("Set window cursor '" << mouseCursorToStr(cursor) << "'");
 
@@ -842,6 +848,14 @@ extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_jwm_WindowWin32__1nSetTitle
     env->ReleaseStringChars(title, titleStr);
 }
 
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_jwm_WindowWin32__1nSetIcon
+        (JNIEnv* env, jobject obj, jstring iconPath) {
+    jwm::WindowWin32* instance = reinterpret_cast<jwm::WindowWin32*>(jwm::classes::Native::fromJava(env, obj));
+    const jchar* iconPathStr = env->GetStringChars(iconPath, nullptr);
+    jsize length = env->GetStringLength(iconPath);
+    instance->setIcon(std::wstring(reinterpret_cast<const wchar_t*>(iconPathStr), length));
+    env->ReleaseStringChars(iconPath, iconPathStr);
+}
 extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_jwm_WindowWin32__1nSetMouseCursor
         (JNIEnv* env, jobject obj, jint cursorId) {
     jwm::WindowWin32* instance = reinterpret_cast<jwm::WindowWin32*>(jwm::classes::Native::fromJava(env, obj));

windows/cc/WindowWin32.cc

@@ -51,6 +51,7 @@ namespace jwm {
         void unmarkText();
         void setImeEnabled(bool enabled);
         void setTitle(const std::wstring& title);
+        void setIcon(const std::wstring& iconPath);
         void setMouseCursor(MouseCursor cursor);
         void show();
         void requestSwap();

windows/cc/WindowWin32.hh

@@ -6,6 +6,7 @@
 import org.jetbrains.annotations.*;
 import org.jetbrains.jwm.*;
 import org.jetbrains.jwm.impl.*;
+import java.io.File;
 
 public class WindowWin32 extends Window {
     @ApiStatus.Internal
@@ -72,6 +73,14 @@ public Window setTitle(String title) {
         return this;
     }
 
+    
+    @Override
+    public Window setIcon(File icon){
+        assert _onUIThread();
+        _nSetIcon(icon.getAbsolutePath().toString());
+        return this;
+    }
+    
     @Override
     public Window setMouseCursor(MouseCursor cursor) {
         assert _onUIThread();
@@ -123,6 +132,7 @@ public void close() {
     @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 _nSetIcon(String iconPath);
     @ApiStatus.Internal public native void _nSetMouseCursor(int cursorId);
     @ApiStatus.Internal public native Screen _nGetScreen();
     @ApiStatus.Internal public native void _nRequestFrame();