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IsItemHovered: Added ImGuiHoveredFlags_DelayNormal, ImGuiHoveredFlags_DelayShort, ImGuiHoveredFlags_NoSharedDelay. (#1485)

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IsItemHovered() can't have a non-zero default, but higher-level tooltip helpers may enable a different default later.
This commit is contained in:
ocornut
2021-11-10 21:02:19 +01:00
parent b3b3a07133
commit e13913ed57
7 changed files with 107 additions and 25 deletions
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40
imgui.cpp
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@ -1147,6 +1147,8 @@ ImGuiIO::ImGuiIO()
#endif
KeyRepeatDelay = 0.275f;
KeyRepeatRate = 0.050f;
HoverDelayNormal = 0.30f;
HoverDelayShort = 0.10f;
UserData = NULL;
Fonts = NULL;
@ -3571,6 +3573,24 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
return false;
}
// Handle hover delay
// (some ideas: https://www.nngroup.com/articles/timing-exposing-content)
float delay;
if (flags & ImGuiHoveredFlags_DelayNormal)
delay = g.IO.HoverDelayNormal;
else if (flags & ImGuiHoveredFlags_DelayShort)
delay = g.IO.HoverDelayShort;
else
delay = 0.0f;
if (delay > 0.0f)
{
ImGuiID hover_delay_id = (g.LastItemData.ID != 0) ? g.LastItemData.ID : window->GetIDFromRectangle(g.LastItemData.Rect);
if ((flags & ImGuiHoveredFlags_NoSharedDelay) && (g.HoverDelayIdPreviousFrame != hover_delay_id))
g.HoverDelayTimer = 0.0f;
g.HoverDelayId = hover_delay_id;
return g.HoverDelayTimer >= delay;
}
return true;
}
@ -4466,6 +4486,23 @@ void ImGui::NewFrame()
}
#endif
// Update hover delay for IsItemHovered() with delays and tooltips
g.HoverDelayIdPreviousFrame = g.HoverDelayId;
if (g.HoverDelayId != 0)
{
//if (g.IO.MouseDelta.x == 0.0f && g.IO.MouseDelta.y == 0.0f) // Need design/flags
g.HoverDelayTimer += g.IO.DeltaTime;
g.HoverDelayClearTimer = 0.0f;
g.HoverDelayId = 0;
}
else if (g.HoverDelayTimer > 0.0f)
{
// This gives a little bit of leeway before clearing the hover timer, allowing mouse to cross gaps
g.HoverDelayClearTimer += g.IO.DeltaTime;
if (g.HoverDelayClearTimer >= ImMax(0.20f, g.IO.DeltaTime * 2.0f)) // ~6 frames at 30 Hz + allow for low framerate
g.HoverDelayTimer = g.HoverDelayClearTimer = 0.0f; // May want a decaying timer, in which case need to clamp at max first, based on max of caller last requested timer.
}
// Drag and drop
g.DragDropAcceptIdPrev = g.DragDropAcceptIdCurr;
g.DragDropAcceptIdCurr = 0;
@ -12381,7 +12418,7 @@ void ImGui::DebugTextEncoding(const char* str)
static void MetricsHelpMarker(const char* desc)
{
ImGui::TextDisabled("(?)");
if (ImGui::IsItemHovered())
if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayShort))
{
ImGui::BeginTooltip();
ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
@ -12756,6 +12793,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
active_id_using_key_input_count += g.ActiveIdUsingKeyInputMask[n] ? 1 : 0;
Text("ActiveIdUsing: NavDirMask: %X, KeyInputMask: %d key(s)", g.ActiveIdUsingNavDirMask, active_id_using_key_input_count);
Text("HoveredId: 0x%08X (%.2f sec), AllowOverlap: %d", g.HoveredIdPreviousFrame, g.HoveredIdTimer, g.HoveredIdAllowOverlap); // Not displaying g.HoveredId as it is update mid-frame
Text("HoverDelayId: 0x%08X, Timer: %.2f, ClearTimer: %.2f", g.HoverDelayId, g.HoverDelayTimer, g.HoverDelayClearTimer);
Text("DragDrop: %d, SourceId = 0x%08X, Payload \"%s\" (%d bytes)", g.DragDropActive, g.DragDropPayload.SourceId, g.DragDropPayload.DataType, g.DragDropPayload.DataSize);
Unindent();