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Internals: Storing ScrollMax into a member. Mostly to facilitate debugging. Also locking down window->Scroll slightly lower in the Begin function.

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This commit is contained in:
omar 2019-06-03 18:51:12 +02:00
parent d6df777ff2
commit 06f1d2c101
2 changed files with 25 additions and 24 deletions
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46
imgui.cpp
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@ -4747,16 +4747,6 @@ ImVec2 ImGui::CalcWindowExpectedSize(ImGuiWindow* window)
return CalcSizeAfterConstraint(window, CalcSizeAutoFit(window, size_contents));
}
float ImGui::GetWindowScrollMaxX(ImGuiWindow* window)
{
return ImMax(0.0f, window->ContentSize.x + window->WindowPadding.x * 2.0f - window->InnerRect.GetWidth());
}
float ImGui::GetWindowScrollMaxY(ImGuiWindow* window)
{
return ImMax(0.0f, window->ContentSize.y + window->WindowPadding.y * 2.0f - window->InnerRect.GetHeight());
}
static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window, bool snap_on_edges)
{
ImGuiContext& g = *GImGui;
@ -4780,8 +4770,8 @@ static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window, bool s
scroll = ImMax(scroll, ImVec2(0.0f, 0.0f));
if (!window->Collapsed && !window->SkipItems)
{
scroll.x = ImMin(scroll.x, ImGui::GetWindowScrollMaxX(window));
scroll.y = ImMin(scroll.y, ImGui::GetWindowScrollMaxY(window));
scroll.x = ImMin(scroll.x, window->ScrollMax.x);
scroll.y = ImMin(scroll.y, window->ScrollMax.y);
}
return scroll;
}
@ -5470,10 +5460,6 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// Lock window rounding for the frame (so that altering them doesn't cause inconsistencies)
window->WindowRounding = (flags & ImGuiWindowFlags_ChildWindow) ? style.ChildRounding : ((flags & ImGuiWindowFlags_Popup) && !(flags & ImGuiWindowFlags_Modal)) ? style.PopupRounding : style.WindowRounding;
// Apply scrolling
window->Scroll = CalcNextScrollFromScrollTargetAndClamp(window, true);
window->ScrollTarget = ImVec2(FLT_MAX, FLT_MAX);
// Apply window focus (new and reactivated windows are moved to front)
bool want_focus = false;
if (window_just_activated_by_user && !(flags & ImGuiWindowFlags_NoFocusOnAppearing))
@ -5538,6 +5524,18 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window->InnerClipRect.Max.y = ImFloor(0.5f + window->InnerRect.Max.y - window->WindowBorderSize);
window->InnerClipRect.ClipWithFull(host_rect);
// SCROLLING
// Lock down maximum scrolling
// The value of ScrollMax are ahead from ScrollbarX/ScrollbarY which is intentionally using InnerRect from previous rect in order to accommodate
// for right/bottom aligned items without creating a scrollbar.
window->ScrollMax.x = ImMax(0.0f, window->ContentSize.x + window->WindowPadding.x * 2.0f - window->InnerRect.GetWidth());
window->ScrollMax.y = ImMax(0.0f, window->ContentSize.y + window->WindowPadding.y * 2.0f - window->InnerRect.GetHeight());
// Apply scrolling
window->Scroll = CalcNextScrollFromScrollTargetAndClamp(window, true);
window->ScrollTarget = ImVec2(FLT_MAX, FLT_MAX);
// DRAWING
// Setup draw list and outer clipping rectangle
@ -5619,7 +5617,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
window->DC.CurrLineSize = window->DC.PrevLineSize = ImVec2(0.0f, 0.0f);
window->DC.CurrLineTextBaseOffset = window->DC.PrevLineTextBaseOffset = 0.0f;
window->DC.NavHideHighlightOneFrame = false;
window->DC.NavHasScroll = (GetWindowScrollMaxY(window) > 0.0f);
window->DC.NavHasScroll = (window->ScrollMax.y > 0.0f);
window->DC.NavLayerActiveMask = window->DC.NavLayerActiveMaskNext;
window->DC.NavLayerActiveMaskNext = 0x00;
window->DC.MenuBarAppending = false;
@ -6687,22 +6685,26 @@ void ImGui::SetCursorScreenPos(const ImVec2& pos)
float ImGui::GetScrollX()
{
return GImGui->CurrentWindow->Scroll.x;
ImGuiWindow* window = GImGui->CurrentWindow;
return window->Scroll.x;
}
float ImGui::GetScrollY()
{
return GImGui->CurrentWindow->Scroll.y;
ImGuiWindow* window = GImGui->CurrentWindow;
return window->Scroll.y;
}
float ImGui::GetScrollMaxX()
{
return GetWindowScrollMaxX(GImGui->CurrentWindow);
ImGuiWindow* window = GImGui->CurrentWindow;
return window->ScrollMax.x;
}
float ImGui::GetScrollMaxY()
{
return GetWindowScrollMaxY(GImGui->CurrentWindow);
ImGuiWindow* window = GImGui->CurrentWindow;
return window->ScrollMax.y;
}
void ImGui::SetScrollX(float scroll_x)
@ -9906,7 +9908,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
(flags & ImGuiWindowFlags_ChildWindow) ? "Child " : "", (flags & ImGuiWindowFlags_Tooltip) ? "Tooltip " : "", (flags & ImGuiWindowFlags_Popup) ? "Popup " : "",
(flags & ImGuiWindowFlags_Modal) ? "Modal " : "", (flags & ImGuiWindowFlags_ChildMenu) ? "ChildMenu " : "", (flags & ImGuiWindowFlags_NoSavedSettings) ? "NoSavedSettings " : "",
(flags & ImGuiWindowFlags_NoMouseInputs)? "NoMouseInputs":"", (flags & ImGuiWindowFlags_NoNavInputs) ? "NoNavInputs" : "", (flags & ImGuiWindowFlags_AlwaysAutoResize) ? "AlwaysAutoResize" : "");
ImGui::BulletText("Scroll: (%.2f/%.2f,%.2f/%.2f)", window->Scroll.x, GetWindowScrollMaxX(window), window->Scroll.y, GetWindowScrollMaxY(window));
ImGui::BulletText("Scroll: (%.2f/%.2f,%.2f/%.2f)", window->Scroll.x, window->ScrollMax.x, window->Scroll.y, window->ScrollMax.y);
ImGui::BulletText("Active: %d/%d, WriteAccessed: %d, BeginOrderWithinContext: %d", window->Active, window->WasActive, window->WriteAccessed, (window->Active || window->WasActive) ? window->BeginOrderWithinContext : -1);
ImGui::BulletText("Appearing: %d, Hidden: %d (CanSkip %d Cannot %d), SkipItems: %d", window->Appearing, window->Hidden, window->HiddenFramesCanSkipItems, window->HiddenFramesCannotSkipItems, window->SkipItems);
ImGui::BulletText("NavLastIds: 0x%08X,0x%08X, NavLayerActiveMask: %X", window->NavLastIds[0], window->NavLastIds[1], window->DC.NavLayerActiveMask);

3
imgui_internal.h
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@ -1262,6 +1262,7 @@ struct IMGUI_API ImGuiWindow
ImGuiID MoveId; // == window->GetID("#MOVE")
ImGuiID ChildId; // ID of corresponding item in parent window (for navigation to return from child window to parent window)
ImVec2 Scroll;
ImVec2 ScrollMax;
ImVec2 ScrollTarget; // target scroll position. stored as cursor position with scrolling canceled out, so the highest point is always 0.0f. (FLT_MAX for no change)
ImVec2 ScrollTargetCenterRatio; // 0.0f = scroll so that target position is at top, 0.5f = scroll so that target position is centered
ImVec2 ScrollbarSizes; // Size taken by scrollbars on each axis
@ -1450,8 +1451,6 @@ namespace ImGui
IMGUI_API bool IsWindowNavFocusable(ImGuiWindow* window);
IMGUI_API void SetWindowScrollX(ImGuiWindow* window, float new_scroll_x);
IMGUI_API void SetWindowScrollY(ImGuiWindow* window, float new_scroll_y);
IMGUI_API float GetWindowScrollMaxX(ImGuiWindow* window);
IMGUI_API float GetWindowScrollMaxY(ImGuiWindow* window);
IMGUI_API ImRect GetWindowAllowedExtentRect(ImGuiWindow* window);
IMGUI_API void SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond = 0);
IMGUI_API void SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond = 0);