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RangeSelect/MultiSelect: Box-Select: added scroll support.

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features/range_select
ocornut ago%!(EXTRA string=2 years)
parent b642c88a30
commit de8a6d0722
4 changed files with 38 additions and 9 deletions
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  1. 1
      imgui.h
  2. 3
      imgui_demo.cpp
  3. 1
      imgui_internal.h
  4. 42
      imgui_widgets.cpp

1
imgui.h
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@ -2671,6 +2671,7 @@ enum ImGuiMultiSelectFlags_
ImGuiMultiSelectFlags_SingleSelect = 1 << 0, // Disable selecting more than one item. This is available to allow single-selection code to use same code/logic is desired, but may not be very useful.
ImGuiMultiSelectFlags_NoSelectAll = 1 << 1, // Disable CTRL+A shortcut to set RequestSelectAll
ImGuiMultiSelectFlags_BoxSelect = 1 << 2, // Enable box-selection. Box-selection works better with little bit of spacing between items hit-box in order to be able to aim at empty space.
ImGuiMultiSelectFlags_NoBoxSelectScroll = 1 << 3, // Disable scrolling when box-selecting near edges of scope.
ImGuiMultiSelectFlags_ClearOnEscape = 1 << 4, // Clear selection when pressing Escape while scope is focused.
ImGuiMultiSelectFlags_ClearOnClickVoid = 1 << 5, // Clear selection when clicking on empty location within scope.
ImGuiMultiSelectFlags_ScopeWindow = 1 << 6, // Scope for _ClearOnClickVoid and _BoxSelect is whole window (Default). Use if (use if BeginMultiSelect() covers a whole window.

3
imgui_demo.cpp
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@ -3342,6 +3342,7 @@ static void ShowDemoWindowMultiSelect()
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_SingleSelect", &flags, ImGuiMultiSelectFlags_SingleSelect);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoSelectAll", &flags, ImGuiMultiSelectFlags_NoSelectAll);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_BoxSelect", &flags, ImGuiMultiSelectFlags_BoxSelect);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_NoBoxSelectScroll", &flags, ImGuiMultiSelectFlags_NoBoxSelectScroll);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_ClearOnEscape", &flags, ImGuiMultiSelectFlags_ClearOnEscape);
ImGui::CheckboxFlags("ImGuiMultiSelectFlags_ClearOnClickVoid", &flags, ImGuiMultiSelectFlags_ClearOnClickVoid);
if (ImGui::CheckboxFlags("ImGuiMultiSelectFlags_ScopeWindow", &flags, ImGuiMultiSelectFlags_ScopeWindow) && (flags & ImGuiMultiSelectFlags_ScopeWindow))
@ -3352,7 +3353,7 @@ static void ShowDemoWindowMultiSelect()
flags &= ~ImGuiMultiSelectFlags_SelectOnClickRelease;
if (ImGui::CheckboxFlags("ImGuiMultiSelectFlags_SelectOnClickRelease", &flags, ImGuiMultiSelectFlags_SelectOnClickRelease) && (flags & ImGuiMultiSelectFlags_SelectOnClickRelease))
flags &= ~ImGuiMultiSelectFlags_SelectOnClick;
ImGui::SameLine(); HelpMarker("Allow dragging an unselected item without altering selection.");
ImGui::SameLine(); HelpMarker("Allow dragging an unselected item without altering selection.");
// Initialize default list with 1000 items.
static ImVector<int> items;

1
imgui_internal.h
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@ -491,6 +491,7 @@ static inline int ImModPositive(int a, int b)
static inline float ImDot(const ImVec2& a, const ImVec2& b) { return a.x * b.x + a.y * b.y; }
static inline ImVec2 ImRotate(const ImVec2& v, float cos_a, float sin_a) { return ImVec2(v.x * cos_a - v.y * sin_a, v.x * sin_a + v.y * cos_a); }
static inline float ImLinearSweep(float current, float target, float speed) { if (current < target) return ImMin(current + speed, target); if (current > target) return ImMax(current - speed, target); return current; }
static inline float ImLinearRemapClamp(float s0, float s1, float d0, float d1, float x) { return ImSaturate((x - s0) / (s1 - s0)) * (d1 - d0) + d0; }
static inline ImVec2 ImMul(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x * rhs.x, lhs.y * rhs.y); }
static inline bool ImIsFloatAboveGuaranteedIntegerPrecision(float f) { return f <= -16777216 || f >= 16777216; }
static inline float ImExponentialMovingAverage(float avg, float sample, int n) { avg -= avg / n; avg += sample / n; return avg; }

42
imgui_widgets.cpp
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@ -6988,6 +6988,7 @@ void ImGui::DebugNodeTypingSelectState(ImGuiTypingSelectState* data)
//-------------------------------------------------------------------------
// - DebugLogMultiSelectRequests() [Internal]
// - BoxSelectStart() [Internal]
// - BoxSelectScrollWithMouseDrag() [Internal]
// - BeginMultiSelect()
// - EndMultiSelect()
// - SetNextItemSelectionUserData()
@ -7016,6 +7017,23 @@ static void BoxSelectStart(ImGuiMultiSelectState* storage, ImGuiSelectionUserDat
storage->BoxSelectStartPosRel = storage->BoxSelectEndPosRel = ImGui::WindowPosAbsToRel(g.CurrentWindow, g.IO.MousePos);
}
static void BoxSelectScrollWithMouseDrag(ImGuiWindow* window, const ImRect& r)
{
ImGuiContext& g = *GImGui;
for (int n = 0; n < 2; n++)
{
float dist = (g.IO.MousePos[n] > r.Max[n]) ? g.IO.MousePos[n] - r.Max[n] : (g.IO.MousePos[n] < r.Min[n]) ? g.IO.MousePos[n] - r.Min[n] : 0.0f;
if (dist == 0.0f || (dist < 0.0f && window->Scroll[n] < 0.0f) || (dist > 0.0f && window->Scroll[n] >= window->ScrollMax[n]))
continue;
float speed_multiplier = ImLinearRemapClamp(g.FontSize, g.FontSize * 5.0f, 1.0f, 4.0f, ImAbs(dist)); // x1 to x4 depending on distance
float scroll_step = IM_ROUND(g.FontSize * 35.0f * speed_multiplier * ImSign(dist) * g.IO.DeltaTime);
if (n == 0)
ImGui::SetScrollX(window, window->Scroll[n] + scroll_step);
else
ImGui::SetScrollY(window, window->Scroll[n] + scroll_step);
}
}
// Return ImGuiMultiSelectIO structure. Lifetime: valid until corresponding call to EndMultiSelect().
ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
{
@ -7025,6 +7043,8 @@ ImGuiMultiSelectIO* ImGui::BeginMultiSelect(ImGuiMultiSelectFlags flags)
IM_ASSERT(g.CurrentMultiSelect == NULL); // No recursion allowed yet (we could allow it if we deem it useful)
IM_STATIC_ASSERT(offsetof(ImGuiMultiSelectTempData, IO) == 0); // Clear() relies on that.
g.CurrentMultiSelect = ms;
if ((flags & (ImGuiMultiSelectFlags_ScopeWindow | ImGuiMultiSelectFlags_ScopeRect)) == 0)
flags |= ImGuiMultiSelectFlags_ScopeWindow;
// FIXME: BeginFocusScope()
const ImGuiID id = window->IDStack.back();
@ -7140,6 +7160,7 @@ ImGuiMultiSelectIO* ImGui::EndMultiSelect()
IM_ASSERT(ms->FocusScopeId == g.CurrentFocusScopeId);
IM_ASSERT(g.CurrentMultiSelect != NULL && storage->Window == g.CurrentWindow);
const ImRect scope_rect = (ms->Flags & ImGuiMultiSelectFlags_ScopeRect) ? ImRect(ms->ScopeRectMin, ImMax(window->DC.CursorMaxPos, ms->ScopeRectMin)) : window->InnerClipRect;
if (ms->IsFocused)
{
// We currently don't allow user code to modify RangeSrcItem by writing to BeginIO's version, but that would be an easy change here.
@ -7155,25 +7176,30 @@ ImGuiMultiSelectIO* ImGui::EndMultiSelect()
storage->NavIdSelected = -1;
}
// Box-select: render selection rectangle
// FIXME-MULTISELECT: Scroll on box-select
if ((ms->Flags & ImGuiMultiSelectFlags_BoxSelect) && storage->BoxSelectActive)
{
// Box-select: render selection rectangle
ms->Storage->BoxSelectEndPosRel = WindowPosAbsToRel(window, g.IO.MousePos);
window->DrawList->AddRectFilled(ms->BoxSelectRectCurr.Min, ms->BoxSelectRectCurr.Max, GetColorU32(ImGuiCol_SeparatorHovered, 0.30f)); // FIXME-MULTISELECT: Styling
window->DrawList->AddRect(ms->BoxSelectRectCurr.Min, ms->BoxSelectRectCurr.Max, GetColorU32(ImGuiCol_NavHighlight)); // FIXME-MULTISELECT: Styling
ImRect box_select_r = ms->BoxSelectRectCurr;
box_select_r.ClipWith(scope_rect);
window->DrawList->AddRectFilled(box_select_r.Min, box_select_r.Max, GetColorU32(ImGuiCol_SeparatorHovered, 0.30f)); // FIXME-MULTISELECT: Styling
window->DrawList->AddRect(box_select_r.Min, box_select_r.Max, GetColorU32(ImGuiCol_NavHighlight)); // FIXME-MULTISELECT: Styling
// Box-select: scroll
ImRect scroll_r = scope_rect;
scroll_r.Expand(g.Style.FramePadding);
if ((ms->Flags & ImGuiMultiSelectFlags_ScopeWindow) && (ms->Flags & ImGuiMultiSelectFlags_NoBoxSelectScroll) == 0 && !scroll_r.Contains(g.IO.MousePos))
BoxSelectScrollWithMouseDrag(window, scroll_r);
}
}
if (ms->IsEndIO == false)
ms->IO.Requests.resize(0);
const ImRect scope_rect(ms->ScopeRectMin, ImMax(window->DC.CursorMaxPos, ms->ScopeRectMin));
const bool scope_hovered = (ms->Flags & ImGuiMultiSelectFlags_ScopeRect) ? IsMouseHoveringRect(scope_rect.Min, scope_rect.Max) : IsWindowHovered();
// Clear selection when clicking void?
// We specifically test for IsMouseDragPastThreshold(0) == false to allow box-selection!
if (scope_hovered && g.HoveredId == 0)
const bool scope_hovered = (ms->Flags & ImGuiMultiSelectFlags_ScopeRect) ? scope_rect.Contains(g.IO.MousePos) : IsWindowHovered();
if (scope_hovered && g.HoveredId == 0 && g.ActiveId == 0)
{
if (ms->Flags & ImGuiMultiSelectFlags_BoxSelect)
if (!storage->BoxSelectActive && !storage->BoxSelectStarting && g.IO.MouseClickedCount[0] == 1)

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