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Added resizable window class #40

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Added resizable window class #40

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38 changes: 35 additions & 3 deletions include/nanogui/window.h
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ NAMESPACE_BEGIN(nanogui)
class NANOGUI_EXPORT Window : public Widget {
friend class Popup;
public:
Window(Widget *parent, const std::string &title = "Untitled");
Window(Widget *parent, const std::string &title = "Window");

/// Return the window title
const std::string &title() const { return m_title; }
Expand All @@ -45,8 +45,14 @@ class NANOGUI_EXPORT Window : public Widget {
/// Center the window in the current \ref Screen
void center();

/// Draw the window
virtual void draw(NVGcontext *ctx) override;
/// Draw the window frame
virtual void drawWindowFrame(NVGcontext* ctx);
/// Draw the window shadow
virtual void drawWindowShadow(NVGcontext* ctx);
/// Draw the window title bar
virtual void drawTitleBar(NVGcontext* ctx);
/// Draw the window
virtual void draw(NVGcontext* ctx) override;
/// Handle mouse enter/leave events
virtual bool mouse_enter_event(const Vector2i &p, bool enter) override;
/// Handle window drag events
Expand All @@ -69,4 +75,30 @@ class NANOGUI_EXPORT Window : public Widget {
bool m_drag;
};

/**
* \class Window window.h nanogui/window.h
*
* \brief Top-level window widget.
*/
class NANOGUI_EXPORT ResizableWindow : public Window {
public:
ResizableWindow(Widget* parent, const std::string& title = "Resizable window", bool enforceMinHeight = true);
/// Draw the window
virtual void draw(NVGcontext* ctx) override;
bool mouse_button_event(const Vector2i& p, int button, bool down, int modifiers) override;
bool mouse_motion_event(const Vector2i& p, const Vector2i& rel, int button, int modifiers) override;
/// Accept scroll events and scroll in the window, or propagate them to the widget under the mouse cursor
virtual bool scroll_event(const Vector2i& p, const Vector2f& rel) override;
/// Invoke the associated layout generator to properly place child widgets, if any
virtual void perform_layout(NVGcontext* ctx) override;
private:
bool m_resizing;
bool m_draggingScrollbar;
bool m_layoutChanged;
Vector2i m_downPos;
Vector2i m_preferred;
bool m_enforceMinHeight;
float m_scroll;
};

NAMESPACE_END(nanogui)
109 changes: 61 additions & 48 deletions src/example1.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@
#include <nanogui/renderpass.h>
#include <iostream>
#include <memory>
#define STB_IMAGE_IMPLEMENTATION
#include <stb_image.h>

using namespace nanogui;
Expand All @@ -46,38 +47,38 @@ class ExampleApplication : public Screen {
public:
ExampleApplication() : Screen(Vector2i(1024, 768), "NanoGUI Test") {
inc_ref();
Window *window = new Window(this, "Button demo");
window->set_position(Vector2i(15, 15));
window->set_layout(new GroupLayout());

/* No need to store a pointer, the data structure will be automatically
freed when the parent window is deleted */
new Label(window, "Push buttons", "sans-bold");

Button *b = new Button(window, "Plain button");

ResizableWindow *resizableWindow = new ResizableWindow(this, "Button demo");
resizableWindow->set_position(Vector2i(15, 15));
resizableWindow->set_layout(new GroupLayout());

// No need to store a pointer, the data structure will be automatically freed when the parent window is deleted
new Label(resizableWindow, "Push buttons", "sans-bold");

Button* b = new Button(resizableWindow, "Plain button");
b->set_callback([] { std::cout << "pushed!" << std::endl; });
b->set_tooltip("short tooltip");

/* Alternative construction notation using variadic template */
b = window->add<Button>("Styled", FA_ROCKET);
// Alternative construction notation using variadic template
b = resizableWindow->add<Button>("Styled", FA_ROCKET);
b->set_background_color(Color(0, 0, 255, 25));
b->set_callback([] { std::cout << "pushed!" << std::endl; });
b->set_tooltip("This button has a fairly long tooltip. It is so long, in "
"fact, that the shown text will span several lines.");

new Label(window, "Toggle buttons", "sans-bold");
b = new Button(window, "Toggle me");
new Label(resizableWindow, "Toggle buttons", "sans-bold");
b = new Button(resizableWindow, "Toggle me");
b->set_flags(Button::ToggleButton);
b->set_change_callback([](bool state) { std::cout << "Toggle button state: " << state << std::endl; });

new Label(window, "Radio buttons", "sans-bold");
b = new Button(window, "Radio button 1");
new Label(resizableWindow, "Radio buttons", "sans-bold");
b = new Button(resizableWindow, "Radio button 1");
b->set_flags(Button::RadioButton);
b = new Button(window, "Radio button 2");
b = new Button(resizableWindow, "Radio button 2");
b->set_flags(Button::RadioButton);

new Label(window, "A tool palette", "sans-bold");
Widget *tools = new Widget(window);
new Label(resizableWindow, "A tool palette", "sans-bold");
Widget* tools = new Widget(resizableWindow);
tools->set_layout(new BoxLayout(Orientation::Horizontal,
Alignment::Middle, 0, 6));

Expand All @@ -86,8 +87,8 @@ class ExampleApplication : public Screen {
b = new ToolButton(tools, FA_COMPASS);
b = new ToolButton(tools, FA_UTENSILS);

new Label(window, "Popup buttons", "sans-bold");
PopupButton *popup_btn = new PopupButton(window, "Popup", FA_FLASK);
new Label(resizableWindow, "Popup buttons", "sans-bold");
PopupButton *popup_btn = new PopupButton(resizableWindow, "Popup", FA_FLASK);
Popup *popup = popup_btn->popup();
popup->set_layout(new GroupLayout());
new Label(popup, "Arbitrary widgets can be placed here");
Expand All @@ -103,34 +104,44 @@ class ExampleApplication : public Screen {
Popup *popup_left = popup_btn->popup();
popup_left->set_layout(new GroupLayout());
new CheckBox(popup_left, "Another check box");

resizableWindow = new ResizableWindow(this, "Scrollable resizableWindow");
resizableWindow->set_position(Vector2i(15, 500));
resizableWindow->set_layout(new GroupLayout());

window = new Window(this, "Basic widgets");
window->set_position(Vector2i(200, 15));
window->set_layout(new GroupLayout());

new Label(window, "Message dialog", "sans-bold");
tools = new Widget(window);
new Label(resizableWindow, "Message dialog", "sans-bold");
tools = new Widget(resizableWindow);
tools->set_layout(new BoxLayout(Orientation::Horizontal,
Alignment::Middle, 0, 6));
Alignment::Middle, 0, 6));
b = new Button(tools, "Info");
b->set_callback([&] {
auto dlg = new MessageDialog(this, MessageDialog::Type::Information, "Title", "This is an information message");
dlg->set_callback([](int result) { std::cout << "Dialog result: " << result << std::endl; });
});
});
b = new Button(tools, "Warn");
b->set_callback([&] {
auto dlg = new MessageDialog(this, MessageDialog::Type::Warning, "Title", "This is a warning message");
dlg->set_callback([](int result) { std::cout << "Dialog result: " << result << std::endl; });
});
});
b = new Button(tools, "Ask");
b->set_callback([&] {
auto dlg = new MessageDialog(this, MessageDialog::Type::Warning, "Title", "This is a question message", "Yes", "No", true);
dlg->set_callback([](int result) { std::cout << "Dialog result: " << result << std::endl; });
});
});
popup_btn = new PopupButton(resizableWindow, "Popup", FA_FLASK);
popup = popup_btn->popup();
popup->set_layout(new GroupLayout());
new Label(popup, "Arbitrary widgets can be placed here");
new CheckBox(popup, "A check box");

resizableWindow = new ResizableWindow(this, "Basic widgets", false);
resizableWindow->set_position(Vector2i(200, 15));
resizableWindow->set_layout(new GroupLayout());

#if defined(_WIN32)
/// Executable is in the Debug/Release/.. subdirectory
std::string resources_folder_path("../icons");
std::string resources_folder_path("../../../Resources/icons");
#else
std::string resources_folder_path("./icons");
#endif
Expand All @@ -144,8 +155,8 @@ class ExampleApplication : public Screen {
}
#endif

new Label(window, "Image panel & scroll panel", "sans-bold");
PopupButton *image_panel_btn = new PopupButton(window, "Image Panel");
new Label(resizableWindow, "Image panel & scroll panel", "sans-bold");
PopupButton *image_panel_btn = new PopupButton(resizableWindow, "Image Panel");
image_panel_btn->set_icon(FA_IMAGES);
popup = image_panel_btn->popup();
VScrollPanel *vscroll = new VScrollPanel(popup);
Expand Down Expand Up @@ -201,8 +212,8 @@ class ExampleApplication : public Screen {
}
);

new Label(window, "File dialog", "sans-bold");
tools = new Widget(window);
new Label(resizableWindow, "File dialog", "sans-bold");
tools = new Widget(resizableWindow);
tools->set_layout(new BoxLayout(Orientation::Horizontal,
Alignment::Middle, 0, 6));
b = new Button(tools, "Open");
Expand All @@ -216,22 +227,22 @@ class ExampleApplication : public Screen {
{ {"png", "Portable Network Graphics"}, {"txt", "Text file"} }, true) << std::endl;
});

new Label(window, "Combo box", "sans-bold");
new ComboBox(window, { "Combo box item 1", "Combo box item 2", "Combo box item 3"});
new Label(window, "Check box", "sans-bold");
CheckBox *cb = new CheckBox(window, "Flag 1",
new Label(resizableWindow, "Combo box", "sans-bold");
new ComboBox(resizableWindow, { "Combo box item 1", "Combo box item 2", "Combo box item 3"});
new Label(resizableWindow, "Check box", "sans-bold");
CheckBox *cb = new CheckBox(resizableWindow, "Flag 1",
[](bool state) { std::cout << "Check box 1 state: " << state << std::endl; }
);
cb->set_checked(true);
cb = new CheckBox(window, "Flag 2",
cb = new CheckBox(resizableWindow, "Flag 2",
[](bool state) { std::cout << "Check box 2 state: " << state << std::endl; }
);
new Label(window, "Progress bar", "sans-bold");
m_progress = new ProgressBar(window);
new Label(resizableWindow, "Progress bar", "sans-bold");
m_progress = new ProgressBar(resizableWindow);

new Label(window, "Slider and text box", "sans-bold");
new Label(resizableWindow, "Slider and text box", "sans-bold");

Widget *panel = new Widget(window);
Widget *panel = new Widget(resizableWindow);
panel->set_layout(new BoxLayout(Orientation::Horizontal,
Alignment::Middle, 0, 20));

Expand All @@ -253,7 +264,7 @@ class ExampleApplication : public Screen {
text_box->set_font_size(20);
text_box->set_alignment(TextBox::Alignment::Right);

window = new Window(this, "Misc. widgets");
Window *window = new Window(this, "Misc. widgets");
window->set_position(Vector2i(425,15));
window->set_layout(new GroupLayout());

Expand Down Expand Up @@ -343,7 +354,8 @@ class ExampleApplication : public Screen {
layout->set_spacing(0, 10);
window->set_layout(layout);

/* FP widget */ {
// FP widget
{
new Label(window, "Floating point :", "sans-bold");
text_box = new TextBox(window);
text_box->set_editable(true);
Expand All @@ -355,7 +367,8 @@ class ExampleApplication : public Screen {
text_box->set_format("[-]?[0-9]*\\.?[0-9]+");
}

/* Positive integer widget */ {
// Positive integer widget
{
new Label(window, "Positive integer :", "sans-bold");
auto int_box = new IntBox<int>(window);
int_box->set_editable(true);
Expand All @@ -370,7 +383,8 @@ class ExampleApplication : public Screen {
int_box->set_value_increment(2);
}

/* Checkbox widget */ {
// Checkbox widget
{
new Label(window, "Checkbox :", "sans-bold");

cb = new CheckBox(window, "Check me");
Expand Down Expand Up @@ -430,7 +444,6 @@ class ExampleApplication : public Screen {
int alpha = (int) (c.w() * 255.0f);
alpha_int_box->set_value(alpha);
});

perform_layout();

/* All NanoGUI widgets are initialized at this point. Now
Expand Down
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