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Horizontal mouse wheel: renamed io.MouseHorizWheel to io.MouseWheelH. Reorganized the code in NewFrame(). Examples: Updated GLFW+GL and SDL+GL accordingly. (#1463)

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This commit is contained in:
omar
2018-01-20 12:36:16 +01:00
parent 6f6b6194b2
commit 0b1fecb792
6 changed files with 59 additions and 73 deletions
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60
imgui.cpp
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@ -2483,47 +2483,45 @@ void ImGui::NewFrame()
if (!mouse_avail_to_imgui && !mouse_dragging_extern_payload)
g.HoveredWindow = g.HoveredRootWindow = NULL;
// Scale & Scrolling
if (g.HoveredWindow && g.IO.MouseWheel != 0.0f && !g.HoveredWindow->Collapsed)
// Mouse wheel scrolling, scale
if (g.HoveredWindow && !g.HoveredWindow->Collapsed && (g.IO.MouseWheel != 0.0f || g.IO.MouseWheelH != 0.0f))
{
// If a child window has the ImGuiWindowFlags_NoScrollWithMouse flag, we give a chance to scroll its parent (unless either ImGuiWindowFlags_NoInputs or ImGuiWindowFlags_NoScrollbar are also set).
ImGuiWindow* window = g.HoveredWindow;
if (g.IO.KeyCtrl && g.IO.FontAllowUserScaling)
{
// Zoom / Scale window
const float new_font_scale = ImClamp(window->FontWindowScale + g.IO.MouseWheel * 0.10f, 0.50f, 2.50f);
const float scale = new_font_scale / window->FontWindowScale;
window->FontWindowScale = new_font_scale;
ImGuiWindow* scroll_window = window;
while ((scroll_window->Flags & ImGuiWindowFlags_ChildWindow) && (scroll_window->Flags & ImGuiWindowFlags_NoScrollWithMouse) && !(scroll_window->Flags & ImGuiWindowFlags_NoScrollbar) && !(scroll_window->Flags & ImGuiWindowFlags_NoInputs) && scroll_window->ParentWindow)
scroll_window = scroll_window->ParentWindow;
const bool scroll_allowed = !(scroll_window->Flags & ImGuiWindowFlags_NoScrollWithMouse) && !(scroll_window->Flags & ImGuiWindowFlags_NoInputs);
const ImVec2 offset = window->Size * (1.0f - scale) * (g.IO.MousePos - window->Pos) / window->Size;
window->Pos += offset;
window->PosFloat += offset;
window->Size *= scale;
window->SizeFull *= scale;
}
else if (!g.IO.KeyCtrl)
if (g.IO.MouseWheel != 0.0f)
{
// Mouse wheel Scrolling
// If a child window has the ImGuiWindowFlags_NoScrollWithMouse flag, we give a chance to scroll its parent (unless either ImGuiWindowFlags_NoInputs or ImGuiWindowFlags_NoScrollbar are also set).
ImGuiWindow* scroll_window = window;
while ((scroll_window->Flags & ImGuiWindowFlags_ChildWindow) && (scroll_window->Flags & ImGuiWindowFlags_NoScrollWithMouse) && !(scroll_window->Flags & ImGuiWindowFlags_NoScrollbar) && !(scroll_window->Flags & ImGuiWindowFlags_NoInputs) && scroll_window->ParentWindow)
scroll_window = scroll_window->ParentWindow;
if (!(scroll_window->Flags & ImGuiWindowFlags_NoScrollWithMouse) && !(scroll_window->Flags & ImGuiWindowFlags_NoInputs))
if (g.IO.KeyCtrl && g.IO.FontAllowUserScaling)
{
// Zoom / Scale window
const float new_font_scale = ImClamp(window->FontWindowScale + g.IO.MouseWheel * 0.10f, 0.50f, 2.50f);
const float scale = new_font_scale / window->FontWindowScale;
window->FontWindowScale = new_font_scale;
const ImVec2 offset = window->Size * (1.0f - scale) * (g.IO.MousePos - window->Pos) / window->Size;
window->Pos += offset;
window->PosFloat += offset;
window->Size *= scale;
window->SizeFull *= scale;
}
else if (!g.IO.KeyCtrl && scroll_allowed)
{
// Mouse wheel vertical scrolling
float scroll_amount = 5 * scroll_window->CalcFontSize();
scroll_amount = (float)(int)ImMin(scroll_amount, (scroll_window->ContentsRegionRect.GetHeight() + scroll_window->WindowPadding.y * 2.0f) * 0.67f);
SetWindowScrollY(scroll_window, scroll_window->Scroll.y - g.IO.MouseWheel * scroll_amount);
}
}
}
// Horizontal wheel scrolling; for consistency, only allowed if Ctrl is not pressed.
if (g.HoveredWindow && g.IO.MouseHorizWheel != 0.0f && !g.HoveredWindow->Collapsed)
{
ImGuiWindow* window = g.HoveredWindow;
if (!g.IO.KeyCtrl && !(window->Flags & ImGuiWindowFlags_NoScrollWithMouse))
if (g.IO.MouseWheelH != 0.0f && scroll_allowed)
{
SetWindowScrollX(window, window->Scroll.x - g.IO.MouseHorizWheel * 10.f);
// Mouse wheel horizontal scrolling (for hardware that supports it)
float scroll_amount = scroll_window->CalcFontSize();
if (!g.IO.KeyCtrl && !(window->Flags & ImGuiWindowFlags_NoScrollWithMouse))
SetWindowScrollX(window, window->Scroll.x - g.IO.MouseWheelH * scroll_amount);
}
}
@ -3040,7 +3038,7 @@ void ImGui::EndFrame()
g.Windows.swap(g.WindowsSortBuffer);
// Clear Input data for next frame
g.IO.MouseWheel = 0.0f;
g.IO.MouseWheel = g.IO.MouseWheelH = 0.0f;
memset(g.IO.InputCharacters, 0, sizeof(g.IO.InputCharacters));
g.FrameCountEnded = g.FrameCount;