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Added GetKeyPressedAmount() (from Nav branch) to be able to measure fast repeat rate accurately. Added internal CalcTypematicPressedRepeatAmount() function.

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This commit is contained in:
omar
2017-08-29 16:13:17 +08:00
parent 1f1e63f705
commit 358e7a194e
3 changed files with 23 additions and 6 deletions
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26
imgui.cpp
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@ -3154,6 +3154,25 @@ bool ImGui::IsKeyDown(int user_key_index)
return GImGui->IO.KeysDown[user_key_index];
}
int ImGui::CalcTypematicPressedRepeatAmount(float t, float t_prev, float repeat_delay, float repeat_rate)
{
if (t == 0.0f)
return 1;
if (t <= repeat_delay || repeat_rate <= 0.0f)
return 0;
const int count = (int)((t - repeat_delay) / repeat_rate) - (int)((t_prev - repeat_delay) / repeat_rate);
return (count > 0) ? count : 0;
}
int ImGui::GetKeyPressedAmount(int key_index, float repeat_delay, float repeat_rate)
{
ImGuiContext& g = *GImGui;
if (key_index < 0) return false;
IM_ASSERT(key_index >= 0 && key_index < IM_ARRAYSIZE(g.IO.KeysDown));
const float t = g.IO.KeysDownDuration[key_index];
return CalcTypematicPressedRepeatAmount(t, t - g.IO.DeltaTime, repeat_delay, repeat_rate);
}
bool ImGui::IsKeyPressed(int user_key_index, bool repeat)
{
ImGuiContext& g = *GImGui;
@ -3162,13 +3181,8 @@ bool ImGui::IsKeyPressed(int user_key_index, bool repeat)
const float t = g.IO.KeysDownDuration[user_key_index];
if (t == 0.0f)
return true;
if (repeat && t > g.IO.KeyRepeatDelay)
{
float delay = g.IO.KeyRepeatDelay, rate = g.IO.KeyRepeatRate;
if ((fmodf(t - delay, rate) > rate*0.5f) != (fmodf(t - delay - g.IO.DeltaTime, rate) > rate*0.5f))
return true;
}
return GetKeyPressedAmount(user_key_index, g.IO.KeyRepeatDelay, g.IO.KeyRepeatRate) > 0;
return false;
}