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# Conflicts:
#	imgui_demo.cpp
This commit is contained in:
omar 2017-10-17 16:20:35 +02:00
commit d96b6ecf88
4 changed files with 79 additions and 41 deletions
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1
README.md
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@ -80,6 +80,7 @@ Frameworks:
- openFrameworks (ofxImGui): https://github.com/jvcleave/ofxImGui
- LÖVE: https://github.com/slages/love-imgui
- NanoRT (software raytraced) https://github.com/syoyo/imgui/tree/nanort/examples/raytrace_example
- Qt3d https://github.com/alpqr/imgui-qt3d
- Unreal Engine 4: https://github.com/segross/UnrealImGui or https://github.com/sronsse/UnrealEngine_ImGui
- SFML: https://github.com/EliasD/imgui-sfml or https://github.com/Mischa-Alff/imgui-backends

104
imgui.cpp
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@ -240,6 +240,7 @@
Here is a change-log of API breaking changes, if you are using one of the functions listed, expect to have to fix some code.
Also read releases logs https://github.com/ocornut/imgui/releases for more details.
- 2017/10/17 (1.52) - marked the old 5-parameters version of Begin() as obsolete (still available). Use SetNextWindowSize()+Begin() instead!
- 2017/10/11 (1.52) - renamed AlignFirstTextHeightToWidgets() to AlignTextToFramePadding(). Kept inline redirection function (will obsolete).
- 2017/09/25 (1.52) - removed SetNextWindowPosCenter() because SetNextWindowPos() now has the optional pivot information to do the same and more. Kept redirection function (will obsolete).
- 2017/08/25 (1.52) - io.MousePos needs to be set to ImVec2(-FLT_MAX,-FLT_MAX) when mouse is unavailable/missing. Previously ImVec2(-1,-1) was enough but we now accept negative mouse coordinates. In your binding if you need to support unavailable mouse, make sure to replace "io.MousePos = ImVec2(-1,-1)" with "io.MousePos = ImVec2(-FLT_MAX,-FLT_MAX)".
@ -2310,8 +2311,9 @@ bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg)
return true;
}
// This is roughly matching the behavior of internal-facing ItemHoverable() which is
// This is roughly matching the behavior of internal-facing ItemHoverable()
// - we allow hovering to be true when ActiveId==window->MoveID, so that clicking on non-interactive items such as a Text() item still returns true with IsItemHovered())
// - this should work even for non-interactive items that have no ID, so we cannot use LastItemId
bool ImGui::IsItemHovered()
{
ImGuiContext& g = *GImGui;
@ -2322,7 +2324,11 @@ bool ImGui::IsItemHovered()
if (!window->DC.LastItemRectHoveredRect)
return false;
if (g.HoveredWindow != window)
// [2017/10/16] Reverted commit 344d48be3 and testing RootWindow instead. I believe it is correct to NOT test for RootWindow but this leaves us unable to use IsItemHovered() after EndChild() itself.
// Until a solution is found I believe reverting to the test from 2017/09/27 is safe since this was the test that has been running for a long while.
//if (g.HoveredWindow != window)
// return false;
if (g.HoveredRootWindow != window->RootWindow)
return false;
if (g.ActiveId != 0 && g.ActiveId != window->DC.LastItemId && !g.ActiveIdAllowOverlap && g.ActiveId != window->MoveId)
return false;
@ -4570,38 +4576,43 @@ void ImGui::EndPopup()
PopStyleVar();
}
// This is a helper to handle the most simple case of associating one named popup to one given widget.
// This is a helper to handle the simplest case of associating one named popup to one given widget.
// 1. If you have many possible popups (for different "instances" of a same widget, or for wholly different widgets), you may be better off handling
// this yourself so you can store data relative to the widget that opened the popup instead of choosing different popup identifiers.
// 2. If you want right-clicking on the same item to reopen the popup at new location, use the same code replacing IsItemHovered() with IsItemRectHovered()
// and passing true to the OpenPopupEx().
// Because: hovering an item in a window below the popup won't normally trigger is hovering behavior/coloring. The pattern of ignoring the fact that
// the item can be interacted with (because it is blocked by the active popup) may useful in some situation when e.g. large canvas as one item, content of menu
// driven by click position.
// This is because hovering an item in a window below the popup won't work. IsItemRectHovered() skips this test.
// The pattern of ignoring the fact that the item can be interacted with (because it is blocked by the active popup) may useful in some situation
// when e.g. large canvas where the content of menu driven by click position.
bool ImGui::BeginPopupContextItem(const char* str_id, int mouse_button)
{
ImGuiWindow* window = GImGui->CurrentWindow;
ImGuiID id = str_id ? window->GetID(str_id) : window->DC.LastItemId; // If user hasn't passed an ID, we can use the LastItemID. Using LastItemID as a Popup ID won't conflict!
IM_ASSERT(id != 0); // However, you cannot pass a NULL str_id if the last item has no identifier (e.g. a Text() item)
if (IsItemHovered() && IsMouseClicked(mouse_button))
OpenPopupEx(GImGui->CurrentWindow->GetID(str_id), false);
return BeginPopup(str_id);
OpenPopupEx(id, false);
return BeginPopupEx(id, 0);
}
bool ImGui::BeginPopupContextWindow(const char* str_id, int mouse_button, bool also_over_items)
{
if (!str_id)
str_id = "window_context";
ImGuiID id = GImGui->CurrentWindow->GetID(str_id);
if (IsWindowRectHovered() && IsMouseClicked(mouse_button))
if (also_over_items || !IsAnyItemHovered())
OpenPopupEx(GImGui->CurrentWindow->GetID(str_id), true);
return BeginPopup(str_id);
OpenPopupEx(id, true);
return BeginPopupEx(id, 0);
}
bool ImGui::BeginPopupContextVoid(const char* str_id, int mouse_button)
{
if (!str_id)
str_id = "void_context";
ImGuiID id = GImGui->CurrentWindow->GetID(str_id);
if (!IsAnyWindowHovered() && IsMouseClicked(mouse_button))
OpenPopupEx(GImGui->CurrentWindow->GetID(str_id), true);
return BeginPopup(str_id);
OpenPopupEx(id, true);
return BeginPopupEx(id, 0);
}
static bool BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, bool border, ImGuiWindowFlags extra_flags)
@ -4627,7 +4638,8 @@ static bool BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, b
else
ImFormatString(title, IM_ARRAYSIZE(title), "%s/%08X", parent_window->Name, id);
bool ret = ImGui::Begin(title, NULL, size, -1.0f, flags);
ImGui::SetNextWindowSize(size);
bool ret = ImGui::Begin(title, NULL, flags);
ImGuiWindow* child_window = ImGui::GetCurrentWindow();
child_window->ChildId = id;
child_window->AutoFitChildAxises = auto_fit_axises;
@ -4898,21 +4910,25 @@ static ImVec2 CalcNextScrollFromScrollTargetAndClamp(ImGuiWindow* window)
return scroll;
}
static ImGuiCol GetWindowBgColorIdxFromFlags(ImGuiWindowFlags flags)
{
if (flags & ImGuiWindowFlags_ComboBox)
return ImGuiCol_ComboBg;
if (flags & (ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_Popup))
return ImGuiCol_PopupBg;
if (flags & ImGuiWindowFlags_ChildWindow)
return ImGuiCol_ChildWindowBg;
return ImGuiCol_WindowBg;
}
// Push a new ImGui window to add widgets to.
// - A default window called "Debug" is automatically stacked at the beginning of every frame so you can use widgets without explicitly calling a Begin/End pair.
// - Begin/End can be called multiple times during the frame with the same window name to append content.
// - 'size_on_first_use' for a regular window denote the initial size for first-time creation (no saved data) and isn't that useful. Use SetNextWindowSize() prior to calling Begin() for more flexible window manipulation.
// - The window name is used as a unique identifier to preserve window information across frames (and save rudimentary information to the .ini file).
// You can use the "##" or "###" markers to use the same label with different id, or same id with different label. See documentation at the top of this file.
// - Return false when window is collapsed, so you can early out in your code. You always need to call ImGui::End() even if false is returned.
// - Passing 'bool* p_open' displays a Close button on the upper-right corner of the window, the pointed value will be set to false when the button is pressed.
// - Passing non-zero 'size' is roughly equivalent to calling SetNextWindowSize(size, ImGuiCond_FirstUseEver) prior to calling Begin().
bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
{
return ImGui::Begin(name, p_open, ImVec2(0.f, 0.f), -1.0f, flags);
}
bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_use, float bg_alpha, ImGuiWindowFlags flags)
{
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
@ -4931,6 +4947,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
ImGuiWindow* window = FindWindowByName(name);
if (!window)
{
ImVec2 size_on_first_use = (g.SetNextWindowSizeCond != 0) ? g.SetNextWindowSizeVal : ImVec2(0.0f, 0.0f); // Any condition flag will do since we are creating a new window here.
window = CreateNewWindow(name, size_on_first_use, flags);
window_is_new = true;
}
@ -5141,8 +5158,9 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
}
if ((flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_Popup))
{
IM_ASSERT(window_size_set_by_api); // Submitted by BeginChild()
window->Pos = window->PosFloat = parent_window->DC.CursorPos;
window->Size = window->SizeFull = size_on_first_use; // NB: argument name 'size_on_first_use' misleading here, it's really just 'size' as provided by user passed via BeginChild()->Begin().
window->Size = window->SizeFull;
}
const bool window_pos_with_pivot = (window->SetWindowPosVal.x != FLT_MAX && window->HiddenFrames == 0);
@ -5297,19 +5315,8 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
window->BorderSize = (flags & ImGuiWindowFlags_ShowBorders) ? 1.0f : 0.0f;
// Window background, Default Alpha
ImGuiCol bg_color_idx = ImGuiCol_WindowBg;
if ((flags & ImGuiWindowFlags_ComboBox) != 0)
bg_color_idx = ImGuiCol_ComboBg;
else if ((flags & ImGuiWindowFlags_Tooltip) != 0 || (flags & ImGuiWindowFlags_Popup) != 0)
bg_color_idx = ImGuiCol_PopupBg;
else if ((flags & ImGuiWindowFlags_ChildWindow) != 0)
bg_color_idx = ImGuiCol_ChildWindowBg;
ImVec4 bg_color = style.Colors[bg_color_idx]; // We don't use GetColorU32() because bg_alpha is assigned (not multiplied) below
if (bg_alpha >= 0.0f)
bg_color.w = bg_alpha;
bg_color.w *= style.Alpha;
if (bg_color.w > 0.0f)
window->DrawList->AddRectFilled(window->Pos+ImVec2(0,window->TitleBarHeight()), window->Pos+window->Size, ColorConvertFloat4ToU32(bg_color), window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? ImGuiCorner_All : ImGuiCorner_BotLeft|ImGuiCorner_BotRight);
ImU32 bg_col = GetColorU32(GetWindowBgColorIdxFromFlags(flags));
window->DrawList->AddRectFilled(window->Pos+ImVec2(0,window->TitleBarHeight()), window->Pos+window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? ImGuiCorner_All : ImGuiCorner_BotLeft|ImGuiCorner_BotRight);
// Title bar
const bool is_focused = g.NavWindow && window->RootNonPopupWindow == g.NavWindow->RootNonPopupWindow;
@ -5523,6 +5530,32 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
return !window->SkipItems;
}
// Old Begin() API with 5 parameters, avoid calling this version directly! Use SetNextWindowSize()+Begin() instead.
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_use, float bg_alpha_override, ImGuiWindowFlags flags)
{
// Old API feature: we could pass the initial window size as a parameter, however this was very misleading because in most cases it would only affect the window when it didn't have storage in the .ini file.
if (size_on_first_use.x != 0.0f || size_on_first_use.y != 0.0f)
SetNextWindowSize(size_on_first_use, ImGuiCond_FirstUseEver);
// Old API feature: we could override the window background alpha with a parameter. This is actually tricky to reproduce manually because:
// (1) there are multiple variants of WindowBg (popup, tooltip, etc.) and (2) you can't call PushStyleColor before Begin and PopStyleColor just after Begin() because of how CheckStackSizes() behave.
// The user-side solution is to do backup = GetStyleColorVec4(ImGuiCol_xxxBG), PushStyleColor(ImGuiCol_xxxBg), Begin, PushStyleColor(ImGuiCol_xxxBg, backup), [...], PopStyleColor(), End(); PopStyleColor() - which is super awkward.
// The alpha override was rarely used but for now we'll leave the Begin() variant around for a bit. We may either lift the constraint on CheckStackSizes() either add a SetNextWindowBgAlpha() helper that does it magically.
ImGuiContext& g = *GImGui;
const ImGuiCol bg_color_idx = GetWindowBgColorIdxFromFlags(flags);
const ImVec4 bg_color_backup = g.Style.Colors[bg_color_idx];
if (bg_alpha_override >= 0.0f)
g.Style.Colors[bg_color_idx].w = bg_alpha_override;
bool ret = Begin(name, p_open, flags);
if (bg_alpha_override >= 0.0f)
g.Style.Colors[bg_color_idx] = bg_color_backup;
return ret;
}
#endif // IMGUI_DISABLE_OBSOLETE_FUNCTIONS
void ImGui::End()
{
ImGuiContext& g = *GImGui;
@ -6124,8 +6157,7 @@ void ImGui::SetWindowSize(const ImVec2& size, ImGuiCond cond)
void ImGui::SetWindowSize(const char* name, const ImVec2& size, ImGuiCond cond)
{
ImGuiWindow* window = FindWindowByName(name);
if (window)
if (ImGuiWindow* window = FindWindowByName(name))
SetWindowSize(window, size, cond);
}

4
imgui.h
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@ -133,7 +133,6 @@ namespace ImGui
// Window
IMGUI_API bool Begin(const char* name, bool* p_open = NULL, ImGuiWindowFlags flags = 0); // push window to the stack and start appending to it. see .cpp for details. return false when window is collapsed, so you can early out in your code. 'bool* p_open' creates a widget on the upper-right to close the window (which sets your bool to false).
IMGUI_API bool Begin(const char* name, bool* p_open, const ImVec2& size_on_first_use, float bg_alpha = -1.0f, ImGuiWindowFlags flags = 0); // OBSOLETE. this is the older/longer API. the extra parameters aren't very relevant. call SetNextWindowSize() instead if you want to set a window size. For regular windows, 'size_on_first_use' only applies to the first time EVER the window is created and probably not what you want! might obsolete this API eventually.
IMGUI_API void End(); // finish appending to current window, pop it off the window stack.
IMGUI_API bool BeginChild(const char* str_id, const ImVec2& size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0); // begin a scrolling region. size==0.0f: use remaining window size, size<0.0f: use remaining window size minus abs(size). size>0.0f: fixed size. each axis can use a different mode, e.g. ImVec2(0,400).
IMGUI_API bool BeginChild(ImGuiID id, const ImVec2& size = ImVec2(0,0), bool border = false, ImGuiWindowFlags extra_flags = 0); // "
@ -393,7 +392,7 @@ namespace ImGui
IMGUI_API void OpenPopup(const char* str_id); // call to mark popup as open (don't call every frame!). popups are closed when user click outside, or if CloseCurrentPopup() is called within a BeginPopup()/EndPopup() block. By default, Selectable()/MenuItem() are calling CloseCurrentPopup(). Popup identifiers are relative to the current ID-stack (so OpenPopup and BeginPopup needs to be at the same level).
IMGUI_API bool BeginPopup(const char* str_id); // return true if the popup is open, and you can start outputting to it. only call EndPopup() if BeginPopup() returned true!
IMGUI_API bool BeginPopupModal(const char* name, bool* p_open = NULL, ImGuiWindowFlags extra_flags = 0); // modal dialog (block interactions behind the modal window, can't close the modal window by clicking outside)
IMGUI_API bool BeginPopupContextItem(const char* str_id, int mouse_button = 1); // helper to open and begin popup when clicked on last item. read comments in .cpp!
IMGUI_API bool BeginPopupContextItem(const char* str_id = NULL, int mouse_button = 1); // helper to open and begin popup when clicked on last item. if you can pass a NULL str_id only if the previous item had an id. If you want to use that on a non-interactive item such as Text() you need to pass in an explicit ID here. read comments in .cpp!
IMGUI_API bool BeginPopupContextWindow(const char* str_id = NULL, int mouse_button = 1, bool also_over_items = true); // helper to open and begin popup when clicked on current window.
IMGUI_API bool BeginPopupContextVoid(const char* str_id = NULL, int mouse_button = 1); // helper to open and begin popup when clicked in void (no window).
IMGUI_API void EndPopup();
@ -498,6 +497,7 @@ namespace ImGui
// Obsolete functions (Will be removed! Also see 'API BREAKING CHANGES' section in imgui.cpp)
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
bool Begin(const char* name, bool* p_open, const ImVec2& size_on_first_use, float bg_alpha_override = -1.0f, ImGuiWindowFlags flags = 0); // OBSOLETE 1.52+. use SetNextWindowSize() instead if you want to set a window size.
static inline void AlignFirstTextHeightToWidgets() { AlignTextToFramePadding(); } // OBSOLETE 1.52+
void SetNextWindowPosCenter(ImGuiCond cond = 0); // OBSOLETE 1.52+
static inline bool IsItemHoveredRect() { return IsItemRectHovered(); } // OBSOLETE 1.51+

11
imgui_demo.cpp
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@ -1405,6 +1405,11 @@ void ImGui::ShowTestWindow(bool* p_open)
if (ImGui::TreeNode("Context menus"))
{
// BeginPopupContextItem() is a helper to provide common/simple popup behavior of essentially doing:
// if (IsItemHovered() && IsMouseClicked(0))
// OpenPopup(id);
// return BeginPopup(id);
// For more advanced uses you may want to replicate and cuztomize this code. This the comments inside BeginPopupContextItem() implementation.
static float value = 0.5f;
ImGui::Text("Value = %.3f (<-- right-click here)", value);
if (ImGui::BeginPopupContextItem("item context menu"))
@ -1416,9 +1421,9 @@ void ImGui::ShowTestWindow(bool* p_open)
}
static char name[32] = "Label1";
char buf[64]; sprintf(buf, "Button: %s###Button", name); // ### operator override ID ignoring the preceeding label
char buf[64]; sprintf(buf, "Button: %s###Button", name); // ### operator override ID ignoring the preceding label
ImGui::Button(buf);
if (ImGui::BeginPopupContextItem("rename context menu"))
if (ImGui::BeginPopupContextItem()) // When used after an item that has an ID (here the Button), we can skip providing an ID to BeginPopupContextItem().
{
ImGui::Text("Edit name:");
ImGui::InputText("##edit", name, IM_ARRAYSIZE(name));
@ -2163,7 +2168,7 @@ static void ShowExampleAppFixedOverlay(bool* p_open)
ImVec2 window_pos = ImVec2((corner & 1) ? ImGui::GetIO().DisplaySize.x - DISTANCE : DISTANCE, (corner & 2) ? ImGui::GetIO().DisplaySize.y - DISTANCE : DISTANCE);
ImVec2 window_pos_pivot = ImVec2((corner & 1) ? 1.0f : 0.0f, (corner & 2) ? 1.0f : 0.0f);
ImGui::SetNextWindowPos(window_pos, ImGuiCond_Always, window_pos_pivot);
ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(0.0f, 0.0f, 0.0f, 0.3f));
ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(0.0f, 0.0f, 0.0f, 0.3f)); // Transparent background
if (ImGui::Begin("Example: Fixed Overlay", p_open, ImGuiWindowFlags_NoTitleBar|ImGuiWindowFlags_NoResize|ImGuiWindowFlags_AlwaysAutoResize|ImGuiWindowFlags_NoMove|ImGuiWindowFlags_NoSavedSettings|ImGuiWindowFlags_NoFocusOnAppearing|ImGuiWindowFlags_NoNavFocus|ImGuiWindowFlags_NoNavInputs))
{
ImGui::Text("Simple overlay\nin the corner of the screen.\n(right-click to change position)");