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Tab Bar: Do not display a tooltip if the name already fits over a giv…
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…en tab. (#3521)
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ocornut committed Oct 19, 2020
1 parent fbe74ed commit e6b99a4
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Showing 3 changed files with 23 additions and 6 deletions.
1 change: 1 addition & 0 deletions docs/CHANGELOG.txt
Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,7 @@ Other Changes:

- Tab Bar: Made it possible to append to an existing tab bar by calling BeginTabBar()/EndTabBar() again.
- Tab Bar: Fixed using more than 128 tabs in a tab bar (scrolling policy recommended).
- Tab Bar: Do not display a tooltip if the name already fits over a given tab. (#3521)
- Drag and Drop: Fix drag and drop to tie same-size drop targets by choosen the later one. Fixes dragging
into a full-window-sized dockspace inside a zero-padded window. (#3519, #2717) [@Black-Cat]
- Backends: OpenGL: use glGetString(GL_VERSION) query instead of glGetIntegerv(GL_MAJOR_VERSION, ...)
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2 changes: 1 addition & 1 deletion imgui_internal.h
Original file line number Diff line number Diff line change
Expand Up @@ -1971,7 +1971,7 @@ namespace ImGui
IMGUI_API bool TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open, ImGuiTabItemFlags flags);
IMGUI_API ImVec2 TabItemCalcSize(const char* label, bool has_close_button);
IMGUI_API void TabItemBackground(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImU32 col);
IMGUI_API bool TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, const char* label, ImGuiID tab_id, ImGuiID close_button_id, bool is_contents_visible);
IMGUI_API void TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, const char* label, ImGuiID tab_id, ImGuiID close_button_id, bool is_contents_visible, bool* out_just_closed, bool* out_text_clipped);

// Render helpers
// AVOID USING OUTSIDE OF IMGUI.CPP! NOT FOR PUBLIC CONSUMPTION. THOSE FUNCTIONS ARE A MESS. THEIR SIGNATURE AND BEHAVIOR WILL CHANGE, THEY NEED TO BE REFACTORED INTO SOMETHING DECENT.
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26 changes: 21 additions & 5 deletions imgui_widgets.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -7677,7 +7677,9 @@ bool ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,

// Render tab label, process close button
const ImGuiID close_button_id = p_open ? GetIDWithSeed("#CLOSE", NULL, id) : 0;
bool just_closed = TabItemLabelAndCloseButton(display_draw_list, bb, flags, tab_bar->FramePadding, label, id, close_button_id, tab_contents_visible);
bool just_closed;
bool text_clipped;
TabItemLabelAndCloseButton(display_draw_list, bb, flags, tab_bar->FramePadding, label, id, close_button_id, tab_contents_visible, &just_closed, &text_clipped);
if (just_closed && p_open != NULL)
{
*p_open = false;
Expand All @@ -7691,7 +7693,7 @@ bool ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,

// Tooltip (FIXME: Won't work over the close button because ItemOverlap systems messes up with HoveredIdTimer)
// We test IsItemHovered() to discard e.g. when another item is active or drag and drop over the tab bar (which g.HoveredId ignores)
if (g.HoveredId == id && !held && g.HoveredIdNotActiveTimer > 0.50f && IsItemHovered())
if (text_clipped && g.HoveredId == id && !held && g.HoveredIdNotActiveTimer > 0.50f && IsItemHovered())
if (!(tab_bar->Flags & ImGuiTabBarFlags_NoTooltip) && !(tab->Flags & ImGuiTabItemFlags_NoTooltip))
SetTooltip("%.*s", (int)(FindRenderedTextEnd(label) - label), label);

Expand Down Expand Up @@ -7756,12 +7758,18 @@ void ImGui::TabItemBackground(ImDrawList* draw_list, const ImRect& bb, ImGuiTabI

// Render text label (with custom clipping) + Unsaved Document marker + Close Button logic
// We tend to lock style.FramePadding for a given tab-bar, hence the 'frame_padding' parameter.
bool ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, const char* label, ImGuiID tab_id, ImGuiID close_button_id, bool is_contents_visible)
void ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb, ImGuiTabItemFlags flags, ImVec2 frame_padding, const char* label, ImGuiID tab_id, ImGuiID close_button_id, bool is_contents_visible, bool* out_just_closed, bool* out_text_clipped)
{
ImGuiContext& g = *GImGui;
ImVec2 label_size = CalcTextSize(label, NULL, true);

if (out_just_closed)
*out_just_closed = false;
if (out_text_clipped)
*out_text_clipped = false;

if (bb.GetWidth() <= 1.0f)
return false;
return;

// In Style V2 we'll have full override of all colors per state (e.g. focused, selected)
// But right now if you want to alter text color of tabs this is what you need to do.
Expand All @@ -7782,6 +7790,13 @@ bool ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb,
}
ImRect text_ellipsis_clip_bb = text_pixel_clip_bb;

// Return clipped state ignoring the close button
if (out_text_clipped)
{
*out_text_clipped = (text_ellipsis_clip_bb.Min.x + label_size.x) > text_pixel_clip_bb.Max.x;
//draw_list->AddCircle(text_ellipsis_clip_bb.Min, 3.0f, *out_text_clipped ? IM_COL32(255, 0, 0, 255) : IM_COL32(0, 255, 0, 255));
}

// Close Button
// We are relying on a subtle and confusing distinction between 'hovered' and 'g.HoveredId' which happens because we are using ImGuiButtonFlags_AllowOverlapMode + SetItemAllowOverlap()
// 'hovered' will be true when hovering the Tab but NOT when hovering the close button
Expand Down Expand Up @@ -7819,7 +7834,8 @@ bool ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb,
g.Style.Alpha = backup_alpha;
#endif

return close_button_pressed;
if (out_just_closed)
*out_just_closed = close_button_pressed;
}


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