1 files changed, 194 insertions, 0 deletions
diff --git a/src/ui.c b/src/ui.c
new file mode 100644
index 0000000..72956a5
--- /dev/null
+++ b/src/ui.c
@@ -0,0 +1,194 @@
+#include "ui.h"
+
+FloatingWindow createFloatingWindow()
+{
+  return (FloatingWindow){
+    .rect = (Rectangle){0.0, 0.0, 100.0, 100.0},
+    .minimized = false,
+    .moving = false,
+    .resizing = false,
+    .callback = NULL,
+    .contentSize = Vector2Zero(),
+    .scroll = Vector2Zero()
+  };
+}
+
+void updateFloatingWindow(FloatingWindow* window, const char* title)
+{
+#ifndef RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT
+#define RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT 24
+#endif
+
+#ifndef RAYGUI_WINDOW_CLOSEBUTTON_SIZE
+#define RAYGUI_WINDOW_CLOSEBUTTON_SIZE 18
+#endif
+
+  int closeTitleSizeDeltaHalf = (RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT -
+                                 RAYGUI_WINDOW_CLOSEBUTTON_SIZE) / 2;
+
+  // Window movement and resize input and collision check.
+  if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON) && !window->moving
+      && !window->resizing)
+  {
+    Vector2 mousePosition = GetMousePosition();
+
+    Rectangle titleCollisionRect = (Rectangle){
+      window->rect.x,
+      window->rect.y,
+      window->rect.width - (RAYGUI_WINDOW_CLOSEBUTTON_SIZE
+                            + closeTitleSizeDeltaHalf),
+      RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT
+    };
+
+    Rectangle resizeCollisionRect = (Rectangle){
+      window->rect.x + window->rect.width - 20,
+      window->rect.y + window->rect.height - 20,
+      20,
+      20
+    };
+
+    if (CheckCollisionPointRec(mousePosition, titleCollisionRect))
+    {
+      window->moving = true;
+    }
+    else if (!window->minimized
+             && CheckCollisionPointRec(mousePosition, resizeCollisionRect))
+    {
+      window->resizing = true;
+    }
+  }
+
+  // Window movement and resize update.
+  if (window->moving)
+  {
+    Vector2 mouseDelta = GetMouseDelta();
+    window->rect.x += mouseDelta.x;
+    window->rect.y += mouseDelta.y;
+
+    if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON))
+    {
+      window->moving = false;
+
+      // Clamp window position keep it inside the application area.
+      if (window->rect.x < 0)
+      {
+        window->rect.x = 0;
+      }
+      else if (window->rect.x > GetScreenWidth() - window->rect.width)
+      {
+        window->rect.x = GetScreenWidth() - window->rect.width;
+      }
+      
+      if (window->rect.y < 0)
+      {
+        window->rect.y = 0;
+      }
+      else if (window->rect.y > GetScreenHeight())
+      {
+        window->rect.y = GetScreenHeight() - RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT;
+      }
+    }
+  }
+  else if (window->resizing)
+  {
+    Vector2 mousePosition = GetMousePosition();
+    
+    if (mousePosition.x > window->rect.x)
+    {
+      window->rect.width = mousePosition.x - window->rect.x;
+    }
+    if (mousePosition.y > window->rect.y)
+    {
+      window->rect.height = mousePosition.y - window->rect.y;
+    }
+
+    // Clamp window size to an arbitrary minimum value and the window size as
+    // the maximum.
+    if (window->rect.width < 100)
+    {
+      window->rect.width = 100;
+    }
+    else if (window->rect.width > GetScreenWidth())
+    {
+      window->rect.width = GetScreenWidth();
+    }
+    
+    if (window->rect.height < 100)
+    {
+      window->rect.height = 100;
+    }
+    else if (window->rect.height > GetScreenHeight())
+    {
+      window->rect.height = GetScreenHeight();
+    }
+
+    if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON))
+    {
+      window->resizing = false;
+    }
+  }
+
+  // window and content drawing with scissor and scroll area
+  if(window->minimized)
+  {
+    GuiStatusBar(
+      (Rectangle){window->rect.x, window->rect.y,
+                  window->rect.width, RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT},
+      title);
+
+    if (GuiButton(
+          (Rectangle){window->rect.x + window->rect.width
+                      - RAYGUI_WINDOW_CLOSEBUTTON_SIZE
+                      - closeTitleSizeDeltaHalf,
+                      window->rect.y + closeTitleSizeDeltaHalf,
+                      RAYGUI_WINDOW_CLOSEBUTTON_SIZE,
+                      RAYGUI_WINDOW_CLOSEBUTTON_SIZE},
+          "#120#"))
+    {
+      window->minimized = false;
+    }
+
+  } else {
+    window->minimized = GuiWindowBox(
+      (Rectangle){window->rect.x, window->rect.y, window->rect.width,
+                  window->rect.height}, title);
+
+    // Scissor and draw content within a scroll panel.
+    if (window->callback != NULL)
+    {
+      Rectangle scissor;
+      
+      GuiScrollPanel(
+        (Rectangle){
+          window->rect.x, window->rect.y + RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT,
+          window->rect.width,
+          window->rect.height - RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT},
+        NULL,
+        (Rectangle){
+          window->rect.x, window->rect.y,
+          window->contentSize.x, window->contentSize.y},
+        &window->scroll,
+        &scissor);
+
+      bool requireScissor = window->rect.width < window->contentSize.x
+        || window->rect.height < window->contentSize.x;
+
+      if (requireScissor)
+      {
+        BeginScissorMode(scissor.x, scissor.y, scissor.width, scissor.height);
+      }
+
+      window->callback((Vector2){window->rect.x, window->rect.y},
+                       window->scroll);
+
+      if (requireScissor)
+      {
+        EndScissorMode();
+      }
+    }
+
+    // Draw the resize button/icon.
+    GuiDrawIcon(71, window->rect.x + window->rect.width - 20,
+                window->rect.y + window->rect.height - 20, 1, GREEN);
+  }
+}