[Change] Render terminal conte in UI window.

client/src/main.cpp

@@ -68,6 +68,7 @@ int main(int argc, char** argv) {
 
   /* Create terminal. */
   Terminal* term = new Terminal();
+  test_window->set_content(term);
 
   bool running = true;
   while(running) {
@@ -83,8 +84,7 @@ int main(int argc, char** argv) {
     glClearColor(0.1f, 0.1f, 0.1, 1.0f);
     glClear(GL_COLOR_BUFFER_BIT);
 
-    test_window->render(shape_renderer_instance, txt_render_instance);
-    term->render(txt_render_instance);
+    test_window->render(shape_renderer_instance, txt_render_instance, SCREEN_HEIGHT);
 
     /* It's really odd to call it SwapWindow now, rather than SwapBuffer. */
     SDL_GL_SwapWindow(window);

client/src/terminal.cpp

@@ -1,8 +1,9 @@
 #include <cstdio>
+#include <SDL3/SDL.h>
+#include <GL/glew.h>
+
 #include "gfx/txt_renderer.h"
 #include "terminal.h"
-#include <SDL3/SDL_events.h>
-#include <SDL3/SDL_keycode.h>
 
 Terminal::Terminal(void) {
   /* Placeholder welcome message to history. */
@@ -41,17 +42,27 @@ void Terminal::handle_input(SDL_Event* event) {
   }
 }
 
-void Terminal::render(TextRenderer* renderer) {
+void Terminal::render(TextRenderer* renderer, int x, int y, int width, int height) {
   float white[]     = { 1.0f, 1.0f, 1.0f };
   float green[]     = { 0.2f, 1.0f, 0.2f };
-  float line_height = 28.0f;
+  float line_height = 20.0f;
+  float padding     = 5.0f;
+
+  /* Enable scissor test to clip rendering to the window content area. */
+  glEnable(GL_SCISSOR_TEST);
+  glScissor(x, y, width, height);
 
   /* Draw history. */
   for(size_t i = 0; i < _history.size(); ++i) {
-    renderer->render_text(_history[i].c_str(), 25.0f, 720.0f-50.0f-(i*line_height), 1.0f, white);
+    float y_pos = (y+height) - padding - line_height - (i*line_height);
+    renderer->render_text(_history[i].c_str(), x+padding, y_pos, 1.0f, white);
   }
 
   /* Draw current input line. */
   std::string prompt = "> " + _input_buffer;
-  renderer->render_text(prompt.c_str(), 25.0f, 720.0f-50.0f-(_history.size()*line_height), 1.0f, green);
+  float prompt_y_pos = (y+height) - padding - line_height - (_history.size()*line_height);
+  renderer->render_text(prompt.c_str(), x+padding, prompt_y_pos, 1.0f, green);
+
+  /* Disable scissor test. */
+  glDisable(GL_SCISSOR_TEST);
 }

client/src/terminal.h

@@ -10,7 +10,7 @@ public:
   Terminal(void);
 
   void handle_input(SDL_Event* event);
-  void render(TextRenderer* renderer);
+  void render(TextRenderer* renderer, int x, int y, int width, int height);
 
 private:
   void _on_ret_press(void);

client/src/ui/ui_window.cpp

@@ -6,11 +6,17 @@ UIWindow::UIWindow(const char* title, int x, int y, int width, int height) {
   _title = title;
   _x = x;
   _y = y;
-  _width = width;
-  _height = height;
+  _width   = width;
+  _height  = height;
+  _content = nullptr;
 }
 
-void UIWindow::render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer) {
+void UIWindow::set_content(Terminal* term) {
+  _content = term;
+}
+
+void UIWindow::render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer,
+                      int screen_height) {
   int title_bar_height = 30;
 
   /* Define colours. */
@@ -18,15 +24,24 @@ void UIWindow::render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer)
   float title_bar_color[]   = { 0.15f, 0.15f, 0.2f  };
   float title_text_color[]  = { 0.9f,  0.9f,  0.9f  };
 
+  /* Convert top-left coords to bottom-left for OpenGL. */
+  int y_gl = screen_height - _y - _height;
+
   /* Draw main window frame/background. */
-  shape_renderer->draw_rect(_x, _y, _width, _height, frame_color);
+  shape_renderer->draw_rect(_x, y_gl, _width, _height, frame_color);
 
   /* Draw title bar. */
-  shape_renderer->draw_rect(_x, _y+_height-title_bar_height, _width,
-                            title_bar_height, title_bar_color);
+  shape_renderer->draw_rect(_x, y_gl+_height-title_bar_height, _width, title_bar_height,
+                            title_bar_color);
 
   /* Draw title text. */
-  txt_renderer->render_text(_title.c_str(), _x+5, _y+_height-title_bar_height+8,
+  txt_renderer->render_text(_title.c_str(), _x+5, y_gl+_height-title_bar_height+8,
                             1.0f, title_text_color);
+
+  if(_content) {
+    int content_y_gl = y_gl;
+    int content_height_gl = _height - title_bar_height;
+    _content->render(txt_renderer, _x, content_y_gl, _width, content_height_gl);
+  }
 }
 

client/src/ui/ui_window.h

@@ -4,15 +4,18 @@
 
 #include "gfx/shape_renderer.h"
 #include "gfx/txt_renderer.h"
+#include "terminal.h"
 
 class UIWindow {
 public:
   UIWindow(const char* title, int x, int y, int width, int height);
 
-  void render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer);
+  void render(ShapeRenderer* shape_renderer, TextRenderer* txt_renderer, int screen_height);
+  void set_content(Terminal* term);
 
 private:
   int _x, _y, _width, _height;
   std::string _title;
+  Terminal* _content;
 };