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IO: moved fields to put more focus on the new functions + update misc docs/references + update main.mm in Apple+Metal example (#4858)
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ocornut
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@ -222,7 +222,7 @@ If you are interested in using Cmake to build and links examples, see:
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**About mouse cursor latency**
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Dear ImGui has no particular extra lag for most behaviors,
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e.g. the value of 'io.MousePos' provided at the time of NewFrame() will result in windows being moved
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e.g. the last value passed to 'io.AddMousePosEvent()' before NewFrame() will result in windows being moved
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to the right spot at the time of EndFrame()/Render(). At 60 FPS your experience should be pleasant.
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However, consider that OS mouse cursors are typically drawn through a very specific hardware accelerated
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@ -114,7 +114,7 @@ void MyLowLevelMouseButtonHandler(int button, bool down)
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{
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// (1) ALWAYS forward mouse data to ImGui! This is automatic with default backends. With your own backend:
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ImGuiIO& io = ImGui::GetIO();
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io.MouseDown[button] = down;
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io.AddMouseButtonEvent(button, down);
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// (2) ONLY forward mouse data to your underlying app/game.
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if (!io.WantCaptureMouse)
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@ -238,7 +238,7 @@
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UITouch *anyTouch = event.allTouches.anyObject;
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CGPoint touchLocation = [anyTouch locationInView:self.view];
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ImGuiIO &io = ImGui::GetIO();
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io.MousePos = ImVec2(touchLocation.x, touchLocation.y);
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io.AddMousePosEvent(touchLocation.x, touchLocation.y);
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BOOL hasActiveTouch = NO;
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for (UITouch *touch in event.allTouches)
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@ -249,7 +249,7 @@
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break;
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}
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}
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io.MouseDown[0] = hasActiveTouch;
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io.AddMouseButtonEvent(0, hasActiveTouch);
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}
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-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self updateIOWithTouchEvent:event]; }
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40
imgui.cpp
40
imgui.cpp
@ -255,9 +255,9 @@ CODE
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io.DeltaTime = 1.0f/60.0f; // set the time elapsed since the previous frame (in seconds)
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io.DisplaySize.x = 1920.0f; // set the current display width
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io.DisplaySize.y = 1280.0f; // set the current display height here
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io.MousePos = my_mouse_pos; // set the mouse position
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io.MouseDown[0] = my_mouse_buttons[0]; // set the mouse button states
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io.MouseDown[1] = my_mouse_buttons[1];
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io.AddMousePosEvent(mouse_x, mouse_y); // update mouse position
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io.AddMouseButtonEvent(0, mouse_b[0]); // update mouse button states
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io.AddMouseButtonEvent(1, mouse_b[1]); // update mouse button states
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// Call NewFrame(), after this point you can use ImGui::* functions anytime
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// (So you want to try calling NewFrame() as early as you can in your main loop to be able to use Dear ImGui everywhere)
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@ -386,6 +386,11 @@ CODE
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When you are not sure about an old symbol or function name, try using the Search/Find function of your IDE to look for comments or references in all imgui files.
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You can read releases logs https://github.com/ocornut/imgui/releases for more details.
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- 2022/01/17 (1.87) - inputs: reworked mouse IO.
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- Backend writing to io.MousePos -> backend should call io.AddMousePosEvent()
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- Backend writing to io.MouseDown[] -> backend should call io.AddMouseButtonEvent()
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- Backend writing to io.MouseWheel -> backend should call io.AddMouseWheelEvent()
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- Backend writing to io.MouseHoveredViewpot -> backend should call io.AddMouseViewportEvent() [Docking branch only]
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- 2022/01/10 (1.87) - inputs: reworked keyboard IO. Removed io.KeyMap[], io.KeysDown[] in favor of calling io.AddKeyEvent(). Removed GetKeyIndex(), now unecessary. All IsKeyXXX() functions now take ImGuiKey values. All features are still functional until IMGUI_DISABLE_OBSOLETE_KEYIO is defined. Read Changelog and Release Notes for details.
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- IsKeyPressed(MY_NATIVE_KEY_XXX) -> use IsKeyPressed(ImGuiKey_XXX)
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- IsKeyPressed(GetKeyIndex(ImGuiKey_XXX)) -> use IsKeyPressed(ImGuiKey_XXX)
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@ -1325,6 +1330,21 @@ void ImGuiIO::AddMousePosEvent(float x, float y)
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g.InputEventsQueue.push_back(e);
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}
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void ImGuiIO::AddMouseButtonEvent(int mouse_button, bool down)
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{
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ImGuiContext& g = *GImGui;
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IM_ASSERT(&g.IO == this && "Can only add events to current context.");
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IM_ASSERT(mouse_button >= 0 && mouse_button < ImGuiMouseButton_COUNT);
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ImGuiInputEvent e;
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e.Type = ImGuiInputEventType_MouseButton;
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e.Source = ImGuiInputSource_Mouse;
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e.MouseButton.Button = mouse_button;
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e.MouseButton.Down = down;
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g.InputEventsQueue.push_back(e);
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}
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// Queue a mouse wheel event (most mouse/API will only have a Y component)
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void ImGuiIO::AddMouseWheelEvent(float wheel_x, float wheel_y)
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{
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ImGuiContext& g = *GImGui;
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@ -1340,20 +1360,6 @@ void ImGuiIO::AddMouseWheelEvent(float wheel_x, float wheel_y)
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g.InputEventsQueue.push_back(e);
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}
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void ImGuiIO::AddMouseButtonEvent(int mouse_button, bool down)
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{
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ImGuiContext& g = *GImGui;
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IM_ASSERT(&g.IO == this && "Can only add events to current context.");
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IM_ASSERT(mouse_button >= 0 && mouse_button < ImGuiMouseButton_COUNT);
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ImGuiInputEvent e;
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e.Type = ImGuiInputEventType_MouseButton;
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e.Source = ImGuiInputSource_Mouse;
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e.MouseButton.Button = mouse_button;
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e.MouseButton.Down = down;
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g.InputEventsQueue.push_back(e);
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}
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void ImGuiIO::AddFocusEvent(bool focused)
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{
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ImGuiContext& g = *GImGui;
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35
imgui.h
35
imgui.h
@ -1979,29 +1979,19 @@ struct ImGuiIO
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#endif
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//------------------------------------------------------------------
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// Input - Fill before calling NewFrame()
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// Input - Call before calling NewFrame()
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//------------------------------------------------------------------
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ImVec2 MousePos; // Mouse position, in pixels. Set to ImVec2(-FLT_MAX, -FLT_MAX) if mouse is unavailable (on another screen, etc.)
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bool MouseDown[5]; // Mouse buttons: 0=left, 1=right, 2=middle + extras (ImGuiMouseButton_COUNT == 5). Dear ImGui mostly uses left and right buttons. Others buttons allows us to track if the mouse is being used by your application + available to user as a convenience via IsMouse** API.
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float MouseWheel; // Mouse wheel Vertical: 1 unit scrolls about 5 lines text.
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float MouseWheelH; // Mouse wheel Horizontal. Most users don't have a mouse with an horizontal wheel, may not be filled by all backends.
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bool KeyCtrl; // Keyboard modifier down: Control
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bool KeyShift; // Keyboard modifier down: Shift
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bool KeyAlt; // Keyboard modifier down: Alt
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bool KeySuper; // Keyboard modifier down: Cmd/Super/Windows
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float NavInputs[ImGuiNavInput_COUNT]; // Gamepad inputs. Cleared back to zero by EndFrame(). Keyboard keys will be auto-mapped and be written here by NewFrame().
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// Input Functions
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IMGUI_API void AddKeyEvent(ImGuiKey key, bool down); // Queue a new key down/up event. Key should be "translated" (as in, generally ImGuiKey_A matches the key end-user would use to emit an 'A' character)
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IMGUI_API void AddKeyModsEvent(ImGuiKeyModFlags modifiers);// Queue a change of Ctrl/Shift/Alt/Super modifiers
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IMGUI_API void AddMousePosEvent(float x, float y); // Queue a mouse position update. Use -FLT_MAX,-FLT_MAX to signify no mouse (e.g. app not focused and not hovered)
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IMGUI_API void AddMouseButtonEvent(int button, bool down); // Queue a mouse button change
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IMGUI_API void AddMouseWheelEvent(float wh_x, float wh_y); // Queue a mouse wheel update
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IMGUI_API void AddFocusEvent(bool focused); // Queue an hosting application/platform windows gain or loss of focus
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IMGUI_API void AddInputCharacter(unsigned int c); // Queue new character input
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IMGUI_API void AddInputCharacterUTF16(ImWchar16 c); // Queue new character input from an UTF-16 character, it can be a surrogate
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IMGUI_API void AddInputCharactersUTF8(const char* str); // Queue new characters input from an UTF-8 string
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IMGUI_API void AddFocusEvent(bool focused); // Queue a gain/loss of focus for the application (generally based on OS/platform focus of your window)
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IMGUI_API void AddInputCharacter(unsigned int c); // Queue a new character input
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IMGUI_API void AddInputCharacterUTF16(ImWchar16 c); // Queue a new character input from an UTF-16 character, it can be a surrogate
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IMGUI_API void AddInputCharactersUTF8(const char* str); // Queue a new characters input from an UTF-8 string
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IMGUI_API void ClearInputCharacters(); // [Internal] Clear the text input buffer manually
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IMGUI_API void ClearInputKeys(); // [Internal] Release all keys
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@ -2039,10 +2029,23 @@ struct ImGuiIO
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// [Internal] Dear ImGui will maintain those fields. Forward compatibility not guaranteed!
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//------------------------------------------------------------------
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// Main Input State
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// (this block used to be written by backend, since 1.87 it is best to NOT write to those directly, call the AddXXX functions above instead)
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// (reading from those variables is fair game, as they are extremely unlikely to be moving anywhere)
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ImVec2 MousePos; // Mouse position, in pixels. Set to ImVec2(-FLT_MAX, -FLT_MAX) if mouse is unavailable (on another screen, etc.)
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bool MouseDown[5]; // Mouse buttons: 0=left, 1=right, 2=middle + extras (ImGuiMouseButton_COUNT == 5). Dear ImGui mostly uses left and right buttons. Others buttons allows us to track if the mouse is being used by your application + available to user as a convenience via IsMouse** API.
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float MouseWheel; // Mouse wheel Vertical: 1 unit scrolls about 5 lines text.
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float MouseWheelH; // Mouse wheel Horizontal. Most users don't have a mouse with an horizontal wheel, may not be filled by all backends.
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bool KeyCtrl; // Keyboard modifier down: Control
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bool KeyShift; // Keyboard modifier down: Shift
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bool KeyAlt; // Keyboard modifier down: Alt
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bool KeySuper; // Keyboard modifier down: Cmd/Super/Windows
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float NavInputs[ImGuiNavInput_COUNT]; // Gamepad inputs. Cleared back to zero by EndFrame(). Keyboard keys will be auto-mapped and be written here by NewFrame().
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// Other state maintained from data above + IO function calls
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ImGuiKeyModFlags KeyMods; // Key mods flags (same as io.KeyCtrl/KeyShift/KeyAlt/KeySuper but merged into flags), updated by NewFrame()
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ImGuiKeyModFlags KeyModsPrev; // Key mods flags (from previous frame)
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ImGuiKeyData KeysData[ImGuiKey_KeysData_SIZE]; // Key state for all known keys. Use IsKeyXXX() functions to access this.
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bool WantCaptureMouseUnlessPopupClose; // Alternative to WantCaptureMouse: (WantCaptureMouse == true && WantCaptureMouseUnlessPopupClose == false) when a click over void is expected to close a popup.
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ImVec2 MousePosPrev; // Previous mouse position (note that MouseDelta is not necessary == MousePos-MousePosPrev, in case either position is invalid)
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ImVec2 MouseClickedPos[5]; // Position at time of clicking
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