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Merge pull request #92 from memononen/master

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Smoother mouse wheel scrolling
This commit is contained in:
omar
2014-11-30 12:25:21 +00:00
parent a31e44b99a 54ea495207
commit 31654958f9
3 changed files with 6 additions and 7 deletions
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2
examples/opengl_example/main.cpp
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@@ -131,7 +131,7 @@ static void glfw_mouse_button_callback(GLFWwindow* window, int button, int actio
static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset) static void glfw_scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
io.MouseWheel = (yoffset != 0.0f) ? yoffset > 0.0f ? 1 : - 1 : 0; // Mouse wheel: -1,0,+1 io.MouseWheel = yoffset; // Use fractional mouse wheel, 1.0 unit 3 lines.
} }
static void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) static void glfw_key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)

9
imgui.cpp
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@@ -1433,16 +1433,15 @@ void ImGui::NewFrame()
g.IO.WantCaptureKeyboard = (g.ActiveId != 0); g.IO.WantCaptureKeyboard = (g.ActiveId != 0);
// Scale & Scrolling // Scale & Scrolling
if (g.HoveredWindow && g.IO.MouseWheel != 0) if (g.HoveredWindow && g.IO.MouseWheel != 0.0f)
{ {
ImGuiWindow* window = g.HoveredWindow; ImGuiWindow* window = g.HoveredWindow;
const int mouse_wheel_dir = g.IO.MouseWheel > 0 ? +1 : -1;
if (g.IO.KeyCtrl) if (g.IO.KeyCtrl)
{ {
if (g.IO.FontAllowUserScaling) if (g.IO.FontAllowUserScaling)
{ {
// Zoom / Scale window // Zoom / Scale window
float new_font_scale = ImClamp(window->FontWindowScale + mouse_wheel_dir * 0.10f, 0.50f, 2.50f); float new_font_scale = ImClamp(window->FontWindowScale + g.IO.MouseWheel * 0.10f, 0.50f, 2.50f);
float scale = new_font_scale / window->FontWindowScale; float scale = new_font_scale / window->FontWindowScale;
window->FontWindowScale = new_font_scale; window->FontWindowScale = new_font_scale;
@@ -1457,7 +1456,7 @@ void ImGui::NewFrame()
{ {
// Scroll // Scroll
const int scroll_lines = (window->Flags & ImGuiWindowFlags_ComboBox) ? 3 : 5; const int scroll_lines = (window->Flags & ImGuiWindowFlags_ComboBox) ? 3 : 5;
window->NextScrollY -= mouse_wheel_dir * window->FontSize() * scroll_lines; window->NextScrollY -= g.IO.MouseWheel * window->FontSize() * scroll_lines;
} }
} }
@@ -1607,7 +1606,7 @@ void ImGui::Render()
g.Windows.swap(sorted_windows); g.Windows.swap(sorted_windows);
// Clear data for next frame // Clear data for next frame
g.IO.MouseWheel = 0; g.IO.MouseWheel = 0.0f;
memset(g.IO.InputCharacters, 0, sizeof(g.IO.InputCharacters)); memset(g.IO.InputCharacters, 0, sizeof(g.IO.InputCharacters));
} }

2
imgui.h
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@@ -488,7 +488,7 @@ struct ImGuiIO
ImVec2 MousePos; // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.) ImVec2 MousePos; // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
bool MouseDown[5]; // Mouse buttons. ImGui itself only uses button 0 (left button) but you can use others as storage for convenience. bool MouseDown[5]; // Mouse buttons. ImGui itself only uses button 0 (left button) but you can use others as storage for convenience.
int MouseWheel; // Mouse wheel: -1,0,+1 float MouseWheel; // Mouse wheel: 1 unit scrolls about 3 lines text.
bool KeyCtrl; // Keyboard modifier pressed: Control bool KeyCtrl; // Keyboard modifier pressed: Control
bool KeyShift; // Keyboard modifier pressed: Shift bool KeyShift; // Keyboard modifier pressed: Shift
bool KeysDown[512]; // Keyboard keys that are pressed (in whatever order user naturally has access to keyboard data) bool KeysDown[512]; // Keyboard keys that are pressed (in whatever order user naturally has access to keyboard data)