Initial tests to get docking working

src/main.cc

@@ -142,6 +142,7 @@ int main(void)
 	imguiCreate();
 	GuiInputState gui_input_state;
 	gGuiInputState = &gui_input_state;
+	ImGui::InitDockContext();
 
 	// Timer
 	Timer timer;
@@ -169,6 +170,7 @@ int main(void)
 		// Start the imgui frame such that widgets can be submitted
 		handle_mouse();
 		glfwGetWindowSize(gWindow, &width, &height);
+
 		imguiBeginFrame (gGuiInputState->mouseX,
 				gGuiInputState->mouseY,
 				gGuiInputState->mouseButton,

src/modules/RenderModule.cc

@@ -127,10 +127,24 @@ static bool module_step(struct module_state *state, float dt) {
 	assert (gWindow != nullptr);
 	glfwGetWindowSize(gWindow, &width, &height);
 	state->renderer->updateShaders();
-	state->renderer->resize (width, height);
+
+	bgfx::reset (width, height);
+
+	int dock_top_offset = 20.0f;
+	int dock_width = 400;
+	ImGui::RootDock(
+			ImVec2(width - dock_width, dock_top_offset),
+			ImVec2(dock_width, height - dock_top_offset)
+			);
+//	ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4 (0.5f, 0.5f, 0.5f, 0.5f));
+
+	state->renderer->resize (0, 20.0f, width - dock_width, height - 20.0f);
+//	state->renderer->resize (0, 20.0f, width, height - 20.0f);
 
 	state->renderer->paintGL();
 
+//	ImGui::PopStyleColor();
+
 	return true;
 }
 
@@ -1165,14 +1179,14 @@ namespace bgfx {
 
 
 void Renderer::initialize(int width, int height) {
-	this->width = width;
+	this->view_width = width;
-	this->height = height;
+	this->view_height = height;
 
 	uint32_t debug = BGFX_DEBUG_TEXT;
 	uint32_t reset = BGFX_RESET_VSYNC;
 
 	reset = BGFX_RESET_VSYNC | BGFX_RESET_MAXANISOTROPY | BGFX_RESET_MSAA_X16;
-	bgfx::reset(width, height, reset);
+	bgfx::reset(view_width, view_height, reset);
 
 	bgfx::setViewClear(0
 			, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
@@ -1180,7 +1194,7 @@ void Renderer::initialize(int width, int height) {
 			, 1.0f
 			, 0
 			);
-	bgfx::setViewRect(0, 0, 0, width, height);
+	bgfx::setViewRect(0, view_offset_x, view_offset_y, view_width, view_height);
 
 	bgfx::RendererType::Enum renderer = bgfx::getRendererType();
 	flipV = false
@@ -1206,7 +1220,7 @@ void Renderer::initialize(int width, int height) {
 	mCurrentLightProbe = LightProbe::Bolonga;
 
 	initialized = true;
-	resize (width, height);
+	resize (view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::frame();
 }
 
@@ -1264,12 +1278,12 @@ void Renderer::shutdown() {
 	cameras.clear();
 }
 
-void Renderer::resize (int width, int height) {
+void Renderer::resize (int x, int y, int width, int height) {
 	if (initialized) {
-		bgfx::reset (width, height);
+		this->view_offset_x = x;
-
+		this->view_offset_y = y;
-		this->width = width;
+		this->view_width = width;
-		this->height = height;
+		this->view_height = height;
 
 		for (uint32_t i = 0; i < cameras.size(); i++) {
 			cameras[i].width = static_cast<float>(width);
@@ -1280,7 +1294,7 @@ void Renderer::resize (int width, int height) {
 
 void Renderer::paintGLSimple() {
 	// Set view 0 default viewport.
-	bgfx::setViewRect(0, 0, 0, width, height);
+	bgfx::setViewRect(0, view_offset_x, view_offset_y, view_width, view_height);
 
 	// This dummy draw call is here to make sure that view 0 is cleared
 	// if no other draw calls are submitted to view 0.
@@ -1319,7 +1333,7 @@ void Renderer::paintGL() {
 	bgfx::dbgTextClear();
 
 	// debug font is 8 pixels wide
-	int num_chars = width / 8;
+	int num_chars = view_width / 8;
 	bgfx::dbgTextPrintf(num_chars - 18, 0, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
 
 	// This dummy draw call is here to make sure that view 0 is cleared
@@ -1384,26 +1398,27 @@ void Renderer::paintGL() {
 	float proj[16];
 	bx::mtxIdentity(view);
 	bx::mtxOrthoRh(proj, 0.f, 1.f, 1.f, 0.f, 0.f, 100.0f);
-	bgfx::setViewRect(RenderState::Skybox, 0, 0, width, height);
+
+	bgfx::setViewRect(RenderState::Skybox, view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::setViewTransform(RenderState::Skybox, view, proj);
 	
 	bgfx::setViewRect(RenderState::ShadowMap, 0, 0, lights[0].shadowMapSize, lights[0].shadowMapSize);
 	bgfx::setViewFrameBuffer(RenderState::ShadowMap, lights[0].shadowMapFB);
 	bgfx::setViewTransform(RenderState::ShadowMap, lights[0].mtxView, lights[0].mtxProj);
 
-	bgfx::setViewRect(RenderState::Scene, 0, 0, width, height);
+	bgfx::setViewRect(RenderState::Scene, view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::setViewTransform(RenderState::Scene, cameras[activeCameraIndex].mtxView, cameras[activeCameraIndex].mtxProj);
 
-	bgfx::setViewRect(RenderState::SceneTextured, 0, 0, width, height);
+	bgfx::setViewRect(RenderState::SceneTextured, view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::setViewTransform(RenderState::SceneTextured, cameras[activeCameraIndex].mtxView, cameras[activeCameraIndex].mtxProj);
 
-	bgfx::setViewRect(RenderState::Lines, 0, 0, width, height);
+	bgfx::setViewRect(RenderState::Lines, view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::setViewTransform(RenderState::Lines, cameras[activeCameraIndex].mtxView, cameras[activeCameraIndex].mtxProj);
 
-	bgfx::setViewRect(RenderState::LinesOccluded, 0, 0, width, height);
+	bgfx::setViewRect(RenderState::LinesOccluded, view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::setViewTransform(RenderState::LinesOccluded, cameras[activeCameraIndex].mtxView, cameras[activeCameraIndex].mtxProj);
 
-	bgfx::setViewRect(RenderState::Debug, 0, 0, width, height);
+	bgfx::setViewRect(RenderState::Debug, view_offset_x, view_offset_y, view_width, view_height);
 	bgfx::setViewTransform(RenderState::Debug, cameras[activeCameraIndex].mtxView, cameras[activeCameraIndex].mtxProj);
 
 
@@ -1641,7 +1656,7 @@ void Renderer::paintGL() {
 
 			float thickness = 0.143f;
 			float miter = 0.0f;
-			float aspect = static_cast<float>(width) / height;
+			float aspect = static_cast<float>(view_width) / static_cast<float>(view_height);
 
 			Vector4f params (thickness, miter, aspect, 0.0f);
 
@@ -1670,15 +1685,15 @@ void Renderer::paintGL() {
 	// process submitted rendering primitives.
 	bgfx::frame();
 
-	ImGui::SetNextWindowSize (ImVec2(400.f, 300.0f), ImGuiSetCond_Once);
+//	ImGui::SetNextWindowSize (ImVec2(400.f, 300.0f), ImGuiSetCond_Once);
-	ImGui::SetNextWindowPos (ImVec2(10.f, 300.0f), ImGuiSetCond_Once);
+//	ImGui::SetNextWindowPos (ImVec2(10.f, 300.0f), ImGuiSetCond_Once);
+//
+	if (ImGui::BeginDock("Render Settings")) {
 
-	ImGui::Begin("Render Settings");
+		if(ImGui::DragFloat3 ("Light0 Pos", lights[0].pos.data(), 1.0f, -10.0f, 10.0f)) {
-
-	if(ImGui::DragFloat3 ("Light0 Pos", lights[0].pos, 1.0f, -10.0f, 10.0f)) {
 		}
 
-	if(ImGui::DragFloat3 ("Light0 Dir", lights[0].dir, 1.0f, -10.0f, 10.0f)) {
+		if(ImGui::DragFloat3 ("Light0 Dir", lights[0].dir.data(), 1.0f, -10.0f, 10.0f)) {
 		}
 
 		float light_at[3];
@@ -1705,8 +1720,9 @@ void Renderer::paintGL() {
 					0.10f
 					);
 		}
+	}
 
-	ImGui::End();
+	ImGui::EndDock();
 
 	// clear debug commands as they have to be issued every frame
 	debugCommands.clear();

src/modules/RenderModule.h

@@ -332,8 +332,10 @@ struct Renderer {
 	bool drawDebug;
 	bool drawFloor = true;
 	bool drawSkybox = true;
-	uint32_t width;
+	uint32_t view_offset_x = 0;
-	uint32_t height;
+	uint32_t view_offset_y = 0;
+	uint32_t view_width = 1;
+	uint32_t view_height = 1;
 
 	bgfx::UniformHandle sceneDefaultTextureSampler;
 	bgfx::TextureHandle sceneDefaultTexture;
@@ -372,7 +374,7 @@ struct Renderer {
 	void shutdown();
 	void paintGL();
 	void paintGLSimple();
-	void resize (int width, int height);
+	void resize (int x, int y, int width, int height);
 
 	// check whether shader files were modified and reload them. Returns
 	// true on success, otherwise false

src/modules/TestModule.cc

@@ -231,11 +231,10 @@ static void module_unload(struct module_state *state, void* write_serializer) {
 }
 
 void ShowModulesWindow(struct module_state *state) {
-	ImGui::SetNextWindowSize (ImVec2(400.f, 300.0f), ImGuiSetCond_Once);
+//	ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4 (0.5f, 0.5f, 0.5f, 0.8f));
-	ImGui::SetNextWindowPos (ImVec2(400.f, 16.0f), ImGuiSetCond_Once);
+	if (ImGui::BeginDock("Modules")) {
-	ImGui::Begin("Modules");
+		ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4 (0.5f, 0.0f, 0.0f, 1.f));
-
+		//	ImGui::Columns(2);
-//	ImGui::Columns(2);
 		int selected = state->modules_window_selected_index;
 		for (int i = 0; i < gModuleManager->mModules.size(); i++) {
 			ImGuiTreeNodeFlags node_flags = 
@@ -274,16 +273,21 @@ void ShowModulesWindow(struct module_state *state) {
 			ImGui::LabelText("mtime", "%ld", selected_module->mtime);
 			ImGui::LabelText("mtimensec", "%ld", selected_module->mtimensec);
 
-//		ImGui::LabelText("mtime", "%s", ctime((time_t*)&selected_module->mtime));
+			//		ImGui::LabelText("mtime", "%s", ctime((time_t*)&selected_module->mtime));
-//		cout << "time_buf = " << ctime((time_t*)&selected_module->mtime) << endl;
+			//		cout << "time_buf = " << ctime((time_t*)&selected_module->mtime) << endl;
 
 			if (ImGui::Button ("Force Reload")) {
 				selected_module->mtime = 0;
 				selected_module->id = 0;
 			}
 		}
+	}
+
+	ImGui::PopStyleColor();
+	ImGui::EndDock();
+
+//		ImGui::PopStyleColor ();
 
-	ImGui::End();
 }
 
 static bool module_step(struct module_state *state, float dt) {