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TreeNode: The collapsing arrow accepts click even if modifier keys are being held, facilitating interactions with multi-select patterns. (#2886, #1896, #1861)

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omar
2019-11-08 15:13:21 +01:00
parent 037126ee0e
commit 011d475532
3 changed files with 15 additions and 7 deletions
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18
imgui_widgets.cpp
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@ -5269,7 +5269,7 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
// - OpenOnDoubleClick .............. double-click anywhere to open
// - OpenOnArrow .................... single-click on arrow to open
// - OpenOnDoubleClick|OpenOnArrow .. single-click on arrow or double-click anywhere to open
ImGuiButtonFlags button_flags = ImGuiButtonFlags_NoKeyModifiers;
ImGuiButtonFlags button_flags = 0;
if (flags & ImGuiTreeNodeFlags_AllowItemOverlap)
button_flags |= ImGuiButtonFlags_AllowItemOverlap;
if (flags & ImGuiTreeNodeFlags_OpenOnDoubleClick)
@ -5277,6 +5277,15 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
if (!is_leaf)
button_flags |= ImGuiButtonFlags_PressedOnDragDropHold;
// We allow clicking on the arrow section with keyboard modifiers held, in order to easily
// allow browsing a tree while preserving selection with code implementing multi-selection patterns.
// When clicking on the rest of the tree node we always disallow keyboard modifiers.
const float hit_padding_x = style.TouchExtraPadding.x;
const float arrow_hit_x1 = (text_pos.x - text_offset_x) - hit_padding_x;
const float arrow_hit_x2 = (text_pos.x - text_offset_x) + (g.FontSize + padding.x * 2.0f) + hit_padding_x;
if (window != g.HoveredWindow || !(g.IO.MousePos.x >= arrow_hit_x1 && g.IO.MousePos.x < arrow_hit_x2))
button_flags |= ImGuiButtonFlags_NoKeyModifiers;
bool selected = (flags & ImGuiTreeNodeFlags_Selected) != 0;
const bool was_selected = selected;
@ -5287,13 +5296,10 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
{
if (pressed)
{
const float hit_padding_x = style.TouchExtraPadding.x;
const float arrow_hit_x1 = (text_pos.x - text_offset_x) - hit_padding_x;
const float arrow_hit_x2 = (text_pos.x - text_offset_x) + (g.FontSize + padding.x * 2.0f) + hit_padding_x;
if (flags & ImGuiTreeNodeFlags_OpenOnArrow)
toggled |= (g.IO.MousePos.x >= arrow_hit_x1 && g.IO.MousePos.x < arrow_hit_x2) && (!g.NavDisableMouseHover); // Lightweight equivalent of IsMouseHoveringRect() since ButtonBehavior() already did the job
if ((flags & (ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick)) == 0 || (g.NavActivateId == id))
toggled = true;
if (flags & ImGuiTreeNodeFlags_OpenOnArrow)
toggled |= (g.IO.MousePos.x >= arrow_hit_x1 && g.IO.MousePos.x < arrow_hit_x2) && (!g.NavDisableMouseHover); // Lightweight equivalent of IsMouseHoveringRect() since ButtonBehavior() already did the job
if ((flags & ImGuiTreeNodeFlags_OpenOnDoubleClick) && g.IO.MouseDoubleClicked[0])
toggled = true;
if (g.DragDropActive && is_open) // When using Drag and Drop "hold to open" we keep the node highlighted after opening, but never close it again.